/* Expand builtin functions.
- Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "machmode.h"
+#include "real.h"
#include "rtl.h"
#include "tree.h"
-#include "obstack.h"
+#include "gimple.h"
#include "flags.h"
#include "regs.h"
#include "hard-reg-set.h"
#include "predict.h"
#include "tm_p.h"
#include "target.h"
-
-#define CALLED_AS_BUILT_IN(NODE) \
- (!strncmp (IDENTIFIER_POINTER (DECL_NAME (NODE)), "__builtin_", 10))
-
-/* Register mappings for target machines without register windows. */
-#ifndef INCOMING_REGNO
-#define INCOMING_REGNO(OUT) (OUT)
-#endif
-#ifndef OUTGOING_REGNO
-#define OUTGOING_REGNO(IN) (IN)
+#include "langhooks.h"
+#include "basic-block.h"
+#include "tree-mudflap.h"
+#include "tree-flow.h"
+#include "value-prof.h"
+#include "diagnostic.h"
+
+#ifndef SLOW_UNALIGNED_ACCESS
+#define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) STRICT_ALIGNMENT
#endif
#ifndef PAD_VARARGS_DOWN
const char *const built_in_class_names[4]
= {"NOT_BUILT_IN", "BUILT_IN_FRONTEND", "BUILT_IN_MD", "BUILT_IN_NORMAL"};
-#define DEF_BUILTIN(X, N, C, T, LT, B, F, NA) STRINGX(X),
-const char *const built_in_names[(int) END_BUILTINS] =
+#define DEF_BUILTIN(X, N, C, T, LT, B, F, NA, AT, IM, COND) #X,
+const char * built_in_names[(int) END_BUILTINS] =
{
#include "builtins.def"
};
/* Setup an array of _DECL trees, make sure each element is
initialized to NULL_TREE. */
tree built_in_decls[(int) END_BUILTINS];
-
-tree (*lang_type_promotes_to) PARAMS ((tree));
-
-static int get_pointer_alignment PARAMS ((tree, unsigned int));
-static tree c_strlen PARAMS ((tree));
-static const char *c_getstr PARAMS ((tree));
-static rtx c_readstr PARAMS ((const char *,
- enum machine_mode));
-static int target_char_cast PARAMS ((tree, char *));
-static rtx get_memory_rtx PARAMS ((tree));
-static int apply_args_size PARAMS ((void));
-static int apply_result_size PARAMS ((void));
+/* Declarations used when constructing the builtin implicitly in the compiler.
+ It may be NULL_TREE when this is invalid (for instance runtime is not
+ required to implement the function call in all cases). */
+tree implicit_built_in_decls[(int) END_BUILTINS];
+
+static const char *c_getstr (tree);
+static rtx c_readstr (const char *, enum machine_mode);
+static int target_char_cast (tree, char *);
+static rtx get_memory_rtx (tree, tree);
+static int apply_args_size (void);
+static int apply_result_size (void);
#if defined (HAVE_untyped_call) || defined (HAVE_untyped_return)
-static rtx result_vector PARAMS ((int, rtx));
+static rtx result_vector (int, rtx);
+#endif
+static void expand_builtin_update_setjmp_buf (rtx);
+static void expand_builtin_prefetch (tree);
+static rtx expand_builtin_apply_args (void);
+static rtx expand_builtin_apply_args_1 (void);
+static rtx expand_builtin_apply (rtx, rtx, rtx);
+static void expand_builtin_return (rtx);
+static enum type_class type_to_class (tree);
+static rtx expand_builtin_classify_type (tree);
+static void expand_errno_check (tree, rtx);
+static rtx expand_builtin_mathfn (tree, rtx, rtx);
+static rtx expand_builtin_mathfn_2 (tree, rtx, rtx);
+static rtx expand_builtin_mathfn_3 (tree, rtx, rtx);
+static rtx expand_builtin_interclass_mathfn (tree, rtx, rtx);
+static rtx expand_builtin_sincos (tree);
+static rtx expand_builtin_cexpi (tree, rtx, rtx);
+static rtx expand_builtin_int_roundingfn (tree, rtx);
+static rtx expand_builtin_int_roundingfn_2 (tree, rtx);
+static rtx expand_builtin_args_info (tree);
+static rtx expand_builtin_next_arg (void);
+static rtx expand_builtin_va_start (tree);
+static rtx expand_builtin_va_end (tree);
+static rtx expand_builtin_va_copy (tree);
+static rtx expand_builtin_memchr (tree, rtx, enum machine_mode);
+static rtx expand_builtin_memcmp (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strcmp (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strncmp (tree, rtx, enum machine_mode);
+static rtx builtin_memcpy_read_str (void *, HOST_WIDE_INT, enum machine_mode);
+static rtx expand_builtin_strcat (tree, tree, rtx, enum machine_mode);
+static rtx expand_builtin_strncat (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strspn (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strcspn (tree, rtx, enum machine_mode);
+static rtx expand_builtin_memcpy (tree, rtx, enum machine_mode);
+static rtx expand_builtin_mempcpy (tree, rtx, enum machine_mode);
+static rtx expand_builtin_mempcpy_args (tree, tree, tree, tree, rtx,
+ enum machine_mode, int);
+static rtx expand_builtin_memmove (tree, rtx, enum machine_mode, int);
+static rtx expand_builtin_memmove_args (tree, tree, tree, tree, rtx,
+ enum machine_mode, int);
+static rtx expand_builtin_bcopy (tree, int);
+static rtx expand_builtin_strcpy (tree, tree, rtx, enum machine_mode);
+static rtx expand_builtin_strcpy_args (tree, tree, tree, rtx, enum machine_mode);
+static rtx expand_builtin_stpcpy (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strncpy (tree, rtx, enum machine_mode);
+static rtx builtin_memset_gen_str (void *, HOST_WIDE_INT, enum machine_mode);
+static rtx expand_builtin_memset (tree, rtx, enum machine_mode);
+static rtx expand_builtin_memset_args (tree, tree, tree, rtx, enum machine_mode, tree);
+static rtx expand_builtin_bzero (tree);
+static rtx expand_builtin_strlen (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strstr (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strpbrk (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strchr (tree, rtx, enum machine_mode);
+static rtx expand_builtin_strrchr (tree, rtx, enum machine_mode);
+static rtx expand_builtin_alloca (tree, rtx);
+static rtx expand_builtin_unop (enum machine_mode, tree, rtx, rtx, optab);
+static rtx expand_builtin_frame_address (tree, tree);
+static rtx expand_builtin_fputs (tree, rtx, bool);
+static rtx expand_builtin_printf (tree, rtx, enum machine_mode, bool);
+static rtx expand_builtin_fprintf (tree, rtx, enum machine_mode, bool);
+static rtx expand_builtin_sprintf (tree, rtx, enum machine_mode);
+static tree stabilize_va_list (tree, int);
+static rtx expand_builtin_expect (tree, rtx);
+static tree fold_builtin_constant_p (tree);
+static tree fold_builtin_expect (tree, tree);
+static tree fold_builtin_classify_type (tree);
+static tree fold_builtin_strlen (tree, tree);
+static tree fold_builtin_inf (tree, int);
+static tree fold_builtin_nan (tree, tree, int);
+static tree rewrite_call_expr (tree, int, tree, int, ...);
+static bool validate_arg (const_tree, enum tree_code code);
+static bool integer_valued_real_p (tree);
+static tree fold_trunc_transparent_mathfn (tree, tree);
+static bool readonly_data_expr (tree);
+static rtx expand_builtin_fabs (tree, rtx, rtx);
+static rtx expand_builtin_signbit (tree, rtx);
+static tree fold_builtin_sqrt (tree, tree);
+static tree fold_builtin_cbrt (tree, tree);
+static tree fold_builtin_pow (tree, tree, tree, tree);
+static tree fold_builtin_powi (tree, tree, tree, tree);
+static tree fold_builtin_cos (tree, tree, tree);
+static tree fold_builtin_cosh (tree, tree, tree);
+static tree fold_builtin_tan (tree, tree);
+static tree fold_builtin_trunc (tree, tree);
+static tree fold_builtin_floor (tree, tree);
+static tree fold_builtin_ceil (tree, tree);
+static tree fold_builtin_round (tree, tree);
+static tree fold_builtin_int_roundingfn (tree, tree);
+static tree fold_builtin_bitop (tree, tree);
+static tree fold_builtin_memory_op (tree, tree, tree, tree, bool, int);
+static tree fold_builtin_strchr (tree, tree, tree);
+static tree fold_builtin_memchr (tree, tree, tree, tree);
+static tree fold_builtin_memcmp (tree, tree, tree);
+static tree fold_builtin_strcmp (tree, tree);
+static tree fold_builtin_strncmp (tree, tree, tree);
+static tree fold_builtin_signbit (tree, tree);
+static tree fold_builtin_copysign (tree, tree, tree, tree);
+static tree fold_builtin_isascii (tree);
+static tree fold_builtin_toascii (tree);
+static tree fold_builtin_isdigit (tree);
+static tree fold_builtin_fabs (tree, tree);
+static tree fold_builtin_abs (tree, tree);
+static tree fold_builtin_unordered_cmp (tree, tree, tree, enum tree_code,
+ enum tree_code);
+static tree fold_builtin_n (tree, tree *, int, bool);
+static tree fold_builtin_0 (tree, bool);
+static tree fold_builtin_1 (tree, tree, bool);
+static tree fold_builtin_2 (tree, tree, tree, bool);
+static tree fold_builtin_3 (tree, tree, tree, tree, bool);
+static tree fold_builtin_4 (tree, tree, tree, tree, tree, bool);
+static tree fold_builtin_varargs (tree, tree, bool);
+
+static tree fold_builtin_strpbrk (tree, tree, tree);
+static tree fold_builtin_strstr (tree, tree, tree);
+static tree fold_builtin_strrchr (tree, tree, tree);
+static tree fold_builtin_strcat (tree, tree);
+static tree fold_builtin_strncat (tree, tree, tree);
+static tree fold_builtin_strspn (tree, tree);
+static tree fold_builtin_strcspn (tree, tree);
+static tree fold_builtin_sprintf (tree, tree, tree, int);
+
+static rtx expand_builtin_object_size (tree);
+static rtx expand_builtin_memory_chk (tree, rtx, enum machine_mode,
+ enum built_in_function);
+static void maybe_emit_chk_warning (tree, enum built_in_function);
+static void maybe_emit_sprintf_chk_warning (tree, enum built_in_function);
+static void maybe_emit_free_warning (tree);
+static tree fold_builtin_object_size (tree, tree);
+static tree fold_builtin_strcat_chk (tree, tree, tree, tree);
+static tree fold_builtin_strncat_chk (tree, tree, tree, tree, tree);
+static tree fold_builtin_sprintf_chk (tree, enum built_in_function);
+static tree fold_builtin_printf (tree, tree, tree, bool, enum built_in_function);
+static tree fold_builtin_fprintf (tree, tree, tree, tree, bool,
+ enum built_in_function);
+static bool init_target_chars (void);
+
+static unsigned HOST_WIDE_INT target_newline;
+static unsigned HOST_WIDE_INT target_percent;
+static unsigned HOST_WIDE_INT target_c;
+static unsigned HOST_WIDE_INT target_s;
+static char target_percent_c[3];
+static char target_percent_s[3];
+static char target_percent_s_newline[4];
+static tree do_mpfr_arg1 (tree, tree, int (*)(mpfr_ptr, mpfr_srcptr, mp_rnd_t),
+ const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, bool);
+static tree do_mpfr_arg2 (tree, tree, tree,
+ int (*)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t));
+static tree do_mpfr_arg3 (tree, tree, tree, tree,
+ int (*)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t));
+static tree do_mpfr_sincos (tree, tree, tree);
+static tree do_mpfr_bessel_n (tree, tree, tree,
+ int (*)(mpfr_ptr, long, mpfr_srcptr, mp_rnd_t),
+ const REAL_VALUE_TYPE *, bool);
+static tree do_mpfr_remquo (tree, tree, tree);
+static tree do_mpfr_lgamma_r (tree, tree, tree);
+
+/* Return true if NODE should be considered for inline expansion regardless
+ of the optimization level. This means whenever a function is invoked with
+ its "internal" name, which normally contains the prefix "__builtin". */
+
+static bool called_as_built_in (tree node)
+{
+ const char *name = IDENTIFIER_POINTER (DECL_NAME (node));
+ if (strncmp (name, "__builtin_", 10) == 0)
+ return true;
+ if (strncmp (name, "__sync_", 7) == 0)
+ return true;
+ return false;
+}
+
+/* Return the alignment in bits of EXP, an object.
+ Don't return more than MAX_ALIGN no matter what, ALIGN is the inital
+ guessed alignment e.g. from type alignment. */
+
+int
+get_object_alignment (tree exp, unsigned int align, unsigned int max_align)
+{
+ unsigned int inner;
+
+ inner = max_align;
+ if (handled_component_p (exp))
+ {
+ HOST_WIDE_INT bitsize, bitpos;
+ tree offset;
+ enum machine_mode mode;
+ int unsignedp, volatilep;
+
+ exp = get_inner_reference (exp, &bitsize, &bitpos, &offset,
+ &mode, &unsignedp, &volatilep, true);
+ if (bitpos)
+ inner = MIN (inner, (unsigned) (bitpos & -bitpos));
+ while (offset)
+ {
+ tree next_offset;
+
+ if (TREE_CODE (offset) == PLUS_EXPR)
+ {
+ next_offset = TREE_OPERAND (offset, 0);
+ offset = TREE_OPERAND (offset, 1);
+ }
+ else
+ next_offset = NULL;
+ if (host_integerp (offset, 1))
+ {
+ /* Any overflow in calculating offset_bits won't change
+ the alignment. */
+ unsigned offset_bits
+ = ((unsigned) tree_low_cst (offset, 1) * BITS_PER_UNIT);
+
+ if (offset_bits)
+ inner = MIN (inner, (offset_bits & -offset_bits));
+ }
+ else if (TREE_CODE (offset) == MULT_EXPR
+ && host_integerp (TREE_OPERAND (offset, 1), 1))
+ {
+ /* Any overflow in calculating offset_factor won't change
+ the alignment. */
+ unsigned offset_factor
+ = ((unsigned) tree_low_cst (TREE_OPERAND (offset, 1), 1)
+ * BITS_PER_UNIT);
+
+ if (offset_factor)
+ inner = MIN (inner, (offset_factor & -offset_factor));
+ }
+ else
+ {
+ inner = MIN (inner, BITS_PER_UNIT);
+ break;
+ }
+ offset = next_offset;
+ }
+ }
+ if (DECL_P (exp))
+ align = MIN (inner, DECL_ALIGN (exp));
+#ifdef CONSTANT_ALIGNMENT
+ else if (CONSTANT_CLASS_P (exp))
+ align = MIN (inner, (unsigned)CONSTANT_ALIGNMENT (exp, align));
#endif
-static rtx expand_builtin_setjmp PARAMS ((tree, rtx));
-static void expand_builtin_prefetch PARAMS ((tree));
-static rtx expand_builtin_apply_args PARAMS ((void));
-static rtx expand_builtin_apply_args_1 PARAMS ((void));
-static rtx expand_builtin_apply PARAMS ((rtx, rtx, rtx));
-static void expand_builtin_return PARAMS ((rtx));
-static enum type_class type_to_class PARAMS ((tree));
-static rtx expand_builtin_classify_type PARAMS ((tree));
-static rtx expand_builtin_mathfn PARAMS ((tree, rtx, rtx));
-static rtx expand_builtin_constant_p PARAMS ((tree));
-static rtx expand_builtin_args_info PARAMS ((tree));
-static rtx expand_builtin_next_arg PARAMS ((tree));
-static rtx expand_builtin_va_start PARAMS ((int, tree));
-static rtx expand_builtin_va_end PARAMS ((tree));
-static rtx expand_builtin_va_copy PARAMS ((tree));
-static rtx expand_builtin_memcmp PARAMS ((tree, tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strcmp PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strncmp PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx builtin_memcpy_read_str PARAMS ((PTR, HOST_WIDE_INT,
- enum machine_mode));
-static rtx expand_builtin_strcat PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strncat PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strspn PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strcspn PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_memcpy PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strcpy PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx builtin_strncpy_read_str PARAMS ((PTR, HOST_WIDE_INT,
- enum machine_mode));
-static rtx expand_builtin_strncpy PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx builtin_memset_read_str PARAMS ((PTR, HOST_WIDE_INT,
- enum machine_mode));
-static rtx expand_builtin_memset PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_bzero PARAMS ((tree));
-static rtx expand_builtin_strlen PARAMS ((tree, rtx));
-static rtx expand_builtin_strstr PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strpbrk PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strchr PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_strrchr PARAMS ((tree, rtx,
- enum machine_mode));
-static rtx expand_builtin_alloca PARAMS ((tree, rtx));
-static rtx expand_builtin_ffs PARAMS ((tree, rtx, rtx));
-static rtx expand_builtin_frame_address PARAMS ((tree));
-static rtx expand_builtin_fputs PARAMS ((tree, int, int));
-static tree stabilize_va_list PARAMS ((tree, int));
-static rtx expand_builtin_expect PARAMS ((tree, rtx));
-static tree fold_builtin_constant_p PARAMS ((tree));
-static tree fold_builtin_classify_type PARAMS ((tree));
-static tree build_function_call_expr PARAMS ((tree, tree));
-static int validate_arglist PARAMS ((tree, ...));
+ else if (TREE_CODE (exp) == VIEW_CONVERT_EXPR
+ || TREE_CODE (exp) == INDIRECT_REF)
+ align = MIN (TYPE_ALIGN (TREE_TYPE (exp)), inner);
+ else
+ align = MIN (align, inner);
+ return MIN (align, max_align);
+}
/* Return the alignment in bits of EXP, a pointer valued expression.
But don't return more than MAX_ALIGN no matter what.
Otherwise, look at the expression to see if we can do better, i.e., if the
expression is actually pointing at an object whose alignment is tighter. */
-static int
-get_pointer_alignment (exp, max_align)
- tree exp;
- unsigned int max_align;
+int
+get_pointer_alignment (tree exp, unsigned int max_align)
{
unsigned int align, inner;
- if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE)
+ /* We rely on TER to compute accurate alignment information. */
+ if (!(optimize && flag_tree_ter))
+ return 0;
+
+ if (!POINTER_TYPE_P (TREE_TYPE (exp)))
return 0;
align = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
{
switch (TREE_CODE (exp))
{
- case NOP_EXPR:
- case CONVERT_EXPR:
- case NON_LVALUE_EXPR:
+ CASE_CONVERT:
exp = TREE_OPERAND (exp, 0);
- if (TREE_CODE (TREE_TYPE (exp)) != POINTER_TYPE)
+ if (! POINTER_TYPE_P (TREE_TYPE (exp)))
return align;
inner = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (exp)));
align = MIN (inner, max_align);
break;
- case PLUS_EXPR:
+ case POINTER_PLUS_EXPR:
/* If sum of pointer + int, restrict our maximum alignment to that
imposed by the integer. If not, we can't do any better than
ALIGN. */
case ADDR_EXPR:
/* See what we are pointing at and look at its alignment. */
- exp = TREE_OPERAND (exp, 0);
- if (TREE_CODE (exp) == FUNCTION_DECL)
- align = FUNCTION_BOUNDARY;
- else if (DECL_P (exp))
- align = DECL_ALIGN (exp);
-#ifdef CONSTANT_ALIGNMENT
- else if (TREE_CODE_CLASS (TREE_CODE (exp)) == 'c')
- align = CONSTANT_ALIGNMENT (exp, align);
-#endif
- return MIN (align, max_align);
+ return get_object_alignment (TREE_OPERAND (exp, 0), align, max_align);
default:
return align;
way, because it could contain a zero byte in the middle.
TREE_STRING_LENGTH is the size of the character array, not the string.
+ ONLY_VALUE should be nonzero if the result is not going to be emitted
+ into the instruction stream and zero if it is going to be expanded.
+ E.g. with i++ ? "foo" : "bar", if ONLY_VALUE is nonzero, constant 3
+ is returned, otherwise NULL, since
+ len = c_strlen (src, 1); if (len) expand_expr (len, ...); would not
+ evaluate the side-effects.
+
The value returned is of type `ssizetype'.
Unfortunately, string_constant can't access the values of const char
arrays with initializers, so neither can we do so here. */
-static tree
-c_strlen (src)
- tree src;
+tree
+c_strlen (tree src, int only_value)
{
tree offset_node;
HOST_WIDE_INT offset;
int max;
const char *ptr;
+ STRIP_NOPS (src);
+ if (TREE_CODE (src) == COND_EXPR
+ && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0))))
+ {
+ tree len1, len2;
+
+ len1 = c_strlen (TREE_OPERAND (src, 1), only_value);
+ len2 = c_strlen (TREE_OPERAND (src, 2), only_value);
+ if (tree_int_cst_equal (len1, len2))
+ return len1;
+ }
+
+ if (TREE_CODE (src) == COMPOUND_EXPR
+ && (only_value || !TREE_SIDE_EFFECTS (TREE_OPERAND (src, 0))))
+ return c_strlen (TREE_OPERAND (src, 1), only_value);
+
src = string_constant (src, &offset_node);
if (src == 0)
- return 0;
+ return NULL_TREE;
max = TREE_STRING_LENGTH (src) - 1;
ptr = TREE_STRING_POINTER (src);
for (i = 0; i < max; i++)
if (ptr[i] == 0)
- return 0;
+ return NULL_TREE;
/* We don't know the starting offset, but we do know that the string
has no internal zero bytes. We can assume that the offset falls
runtime. */
if (offset < 0 || offset > max)
{
- warning ("offset outside bounds of constant string");
- return 0;
+ /* Suppress multiple warnings for propagated constant strings. */
+ if (! TREE_NO_WARNING (src))
+ {
+ warning (0, "offset outside bounds of constant string");
+ TREE_NO_WARNING (src) = 1;
+ }
+ return NULL_TREE;
}
/* Use strlen to search for the first zero byte. Since any strings
or sum of string constant and integer constant. */
static const char *
-c_getstr (src)
- tree src;
+c_getstr (tree src)
{
tree offset_node;
GET_MODE_BITSIZE (MODE) bits from string constant STR. */
static rtx
-c_readstr (str, mode)
- const char *str;
- enum machine_mode mode;
+c_readstr (const char *str, enum machine_mode mode)
{
HOST_WIDE_INT c[2];
HOST_WIDE_INT ch;
unsigned int i, j;
- if (GET_MODE_CLASS (mode) != MODE_INT)
- abort ();
+ gcc_assert (GET_MODE_CLASS (mode) == MODE_INT);
+
c[0] = 0;
c[1] = 0;
ch = 1;
&& GET_MODE_SIZE (mode) > UNITS_PER_WORD)
j = j + UNITS_PER_WORD - 2 * (j % UNITS_PER_WORD) - 1;
j *= BITS_PER_UNIT;
- if (j > 2 * HOST_BITS_PER_WIDE_INT)
- abort ();
+ gcc_assert (j <= 2 * HOST_BITS_PER_WIDE_INT);
+
if (ch)
ch = (unsigned char) str[i];
c[j / HOST_BITS_PER_WIDE_INT] |= ch << (j % HOST_BITS_PER_WIDE_INT);
}
/* Cast a target constant CST to target CHAR and if that value fits into
- host char type, return zero and put that value into variable pointed by
+ host char type, return zero and put that value into variable pointed to by
P. */
static int
-target_char_cast (cst, p)
- tree cst;
- char *p;
+target_char_cast (tree cst, char *p)
{
unsigned HOST_WIDE_INT val, hostval;
return 0;
}
+/* Similar to save_expr, but assumes that arbitrary code is not executed
+ in between the multiple evaluations. In particular, we assume that a
+ non-addressable local variable will not be modified. */
+
+static tree
+builtin_save_expr (tree exp)
+{
+ if (TREE_ADDRESSABLE (exp) == 0
+ && (TREE_CODE (exp) == PARM_DECL
+ || (TREE_CODE (exp) == VAR_DECL && !TREE_STATIC (exp))))
+ return exp;
+
+ return save_expr (exp);
+}
+
/* Given TEM, a pointer to a stack frame, follow the dynamic chain COUNT
times to get the address of either a higher stack frame, or a return
address located within it (depending on FNDECL_CODE). */
-rtx
-expand_builtin_return_addr (fndecl_code, count, tem)
- enum built_in_function fndecl_code;
- int count;
- rtx tem;
+static rtx
+expand_builtin_return_addr (enum built_in_function fndecl_code, int count)
{
int i;
+#ifdef INITIAL_FRAME_ADDRESS_RTX
+ rtx tem = INITIAL_FRAME_ADDRESS_RTX;
+#else
+ rtx tem;
+
+ /* For a zero count with __builtin_return_address, we don't care what
+ frame address we return, because target-specific definitions will
+ override us. Therefore frame pointer elimination is OK, and using
+ the soft frame pointer is OK.
+
+ For a nonzero count, or a zero count with __builtin_frame_address,
+ we require a stable offset from the current frame pointer to the
+ previous one, so we must use the hard frame pointer, and
+ we must disable frame pointer elimination. */
+ if (count == 0 && fndecl_code == BUILT_IN_RETURN_ADDRESS)
+ tem = frame_pointer_rtx;
+ else
+ {
+ tem = hard_frame_pointer_rtx;
+
+ /* Tell reload not to eliminate the frame pointer. */
+ crtl->accesses_prior_frames = 1;
+ }
+#endif
+
/* Some machines need special handling before we can access
- arbitrary frames. For example, on the sparc, we must first flush
+ arbitrary frames. For example, on the SPARC, we must first flush
all register windows to the stack. */
#ifdef SETUP_FRAME_ADDRESSES
if (count > 0)
SETUP_FRAME_ADDRESSES ();
#endif
- /* On the sparc, the return address is not in the frame, it is in a
+ /* On the SPARC, the return address is not in the frame, it is in a
register. There is no way to access it off of the current frame
pointer, but it can be accessed off the previous frame pointer by
reading the value from the register window save area. */
tem = DYNAMIC_CHAIN_ADDRESS (tem);
#endif
tem = memory_address (Pmode, tem);
- tem = gen_rtx_MEM (Pmode, tem);
- set_mem_alias_set (tem, get_frame_alias_set ());
+ tem = gen_frame_mem (Pmode, tem);
tem = copy_to_reg (tem);
}
- /* For __builtin_frame_address, return what we've got. */
+ /* For __builtin_frame_address, return what we've got. But, on
+ the SPARC for example, we may have to add a bias. */
if (fndecl_code == BUILT_IN_FRAME_ADDRESS)
+#ifdef FRAME_ADDR_RTX
+ return FRAME_ADDR_RTX (tem);
+#else
return tem;
+#endif
- /* For __builtin_return_address, Get the return address from that
- frame. */
+ /* For __builtin_return_address, get the return address from that frame. */
#ifdef RETURN_ADDR_RTX
tem = RETURN_ADDR_RTX (count, tem);
#else
tem = memory_address (Pmode,
plus_constant (tem, GET_MODE_SIZE (Pmode)));
- tem = gen_rtx_MEM (Pmode, tem);
- set_mem_alias_set (tem, get_frame_alias_set ());
+ tem = gen_frame_mem (Pmode, tem);
#endif
return tem;
}
/* Alias set used for setjmp buffer. */
-static HOST_WIDE_INT setjmp_alias_set = -1;
+static alias_set_type setjmp_alias_set = -1;
/* Construct the leading half of a __builtin_setjmp call. Control will
- return to RECEIVER_LABEL. This is used directly by sjlj exception
- handling code. */
+ return to RECEIVER_LABEL. This is also called directly by the SJLJ
+ exception handling code. */
void
-expand_builtin_setjmp_setup (buf_addr, receiver_label)
- rtx buf_addr;
- rtx receiver_label;
+expand_builtin_setjmp_setup (rtx buf_addr, rtx receiver_label)
{
enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
rtx stack_save;
if (setjmp_alias_set == -1)
setjmp_alias_set = new_alias_set ();
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (buf_addr) != Pmode)
- buf_addr = convert_memory_address (Pmode, buf_addr);
-#endif
+ buf_addr = convert_memory_address (Pmode, buf_addr);
buf_addr = force_reg (Pmode, force_operand (buf_addr, NULL_RTX));
- emit_queue ();
-
/* We store the frame pointer and the address of receiver_label in
the buffer and use the rest of it for the stack save area, which
is machine-dependent. */
-#ifndef BUILTIN_SETJMP_FRAME_VALUE
-#define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx
-#endif
-
mem = gen_rtx_MEM (Pmode, buf_addr);
set_mem_alias_set (mem, setjmp_alias_set);
- emit_move_insn (mem, BUILTIN_SETJMP_FRAME_VALUE);
+ emit_move_insn (mem, targetm.builtin_setjmp_frame_value ());
mem = gen_rtx_MEM (Pmode, plus_constant (buf_addr, GET_MODE_SIZE (Pmode))),
set_mem_alias_set (mem, setjmp_alias_set);
/* Tell optimize_save_area_alloca that extra work is going to
need to go on during alloca. */
- current_function_calls_setjmp = 1;
+ cfun->calls_setjmp = 1;
- /* Set this so all the registers get saved in our frame; we need to be
- able to copy the saved values for any registers from frames we unwind. */
- current_function_has_nonlocal_label = 1;
+ /* We have a nonlocal label. */
+ cfun->has_nonlocal_label = 1;
}
-/* Construct the trailing part of a __builtin_setjmp call.
- This is used directly by sjlj exception handling code. */
+/* Construct the trailing part of a __builtin_setjmp call. This is
+ also called directly by the SJLJ exception handling code. */
void
-expand_builtin_setjmp_receiver (receiver_label)
- rtx receiver_label ATTRIBUTE_UNUSED;
+expand_builtin_setjmp_receiver (rtx receiver_label ATTRIBUTE_UNUSED)
{
/* Clobber the FP when we get here, so we have to make sure it's
marked as used by this function. */
- emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
+ emit_use (hard_frame_pointer_rtx);
/* Mark the static chain as clobbered here so life information
doesn't get messed up for it. */
- emit_insn (gen_rtx_CLOBBER (VOIDmode, static_chain_rtx));
+ emit_clobber (static_chain_rtx);
/* Now put in the code to restore the frame pointer, and argument
- pointer, if needed. The code below is from expand_end_bindings
- in stmt.c; see detailed documentation there. */
+ pointer, if needed. */
#ifdef HAVE_nonlocal_goto
if (! HAVE_nonlocal_goto)
#endif
- emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx);
+ {
+ emit_move_insn (virtual_stack_vars_rtx, hard_frame_pointer_rtx);
+ /* This might change the hard frame pointer in ways that aren't
+ apparent to early optimization passes, so force a clobber. */
+ emit_clobber (hard_frame_pointer_rtx);
+ }
#if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
if (fixed_regs[ARG_POINTER_REGNUM])
{
/* Now restore our arg pointer from the address at which it
was saved in our stack frame. */
- emit_move_insn (virtual_incoming_args_rtx,
- copy_to_reg (get_arg_pointer_save_area (cfun)));
+ emit_move_insn (crtl->args.internal_arg_pointer,
+ copy_to_reg (get_arg_pointer_save_area ()));
}
}
#endif
#endif
{ /* Nothing */ }
- /* @@@ This is a kludge. Not all machine descriptions define a blockage
- insn, but we must not allow the code we just generated to be reordered
- by scheduling. Specifically, the update of the frame pointer must
- happen immediately, not later. So emit an ASM_INPUT to act as blockage
- insn. */
- emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
-}
-
-/* __builtin_setjmp is passed a pointer to an array of five words (not
- all will be used on all machines). It operates similarly to the C
- library function of the same name, but is more efficient. Much of
- the code below (and for longjmp) is copied from the handling of
- non-local gotos.
-
- NOTE: This is intended for use by GNAT and the exception handling
- scheme in the compiler and will only work in the method used by
- them. */
-
-static rtx
-expand_builtin_setjmp (arglist, target)
- tree arglist;
- rtx target;
-{
- rtx buf_addr, next_lab, cont_lab;
-
- if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
- return NULL_RTX;
-
- if (target == 0 || GET_CODE (target) != REG
- || REGNO (target) < FIRST_PSEUDO_REGISTER)
- target = gen_reg_rtx (TYPE_MODE (integer_type_node));
-
- buf_addr = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
-
- next_lab = gen_label_rtx ();
- cont_lab = gen_label_rtx ();
-
- expand_builtin_setjmp_setup (buf_addr, next_lab);
-
- /* Set TARGET to zero and branch to the continue label. */
- emit_move_insn (target, const0_rtx);
- emit_jump_insn (gen_jump (cont_lab));
- emit_barrier ();
- emit_label (next_lab);
-
- expand_builtin_setjmp_receiver (next_lab);
-
- /* Set TARGET to one. */
- emit_move_insn (target, const1_rtx);
- emit_label (cont_lab);
-
- /* Tell flow about the strange goings on. Putting `next_lab' on
- `nonlocal_goto_handler_labels' to indicates that function
- calls may traverse the arc back to this label. */
-
- current_function_has_nonlocal_label = 1;
- nonlocal_goto_handler_labels
- = gen_rtx_EXPR_LIST (VOIDmode, next_lab, nonlocal_goto_handler_labels);
-
- return target;
+ /* We must not allow the code we just generated to be reordered by
+ scheduling. Specifically, the update of the frame pointer must
+ happen immediately, not later. */
+ emit_insn (gen_blockage ());
}
/* __builtin_longjmp is passed a pointer to an array of five words (not
all will be used on all machines). It operates similarly to the C
library function of the same name, but is more efficient. Much of
- the code below is copied from the handling of non-local gotos.
+ the code below is copied from the handling of non-local gotos. */
- NOTE: This is intended for use by GNAT and the exception handling
- scheme in the compiler and will only work in the method used by
- them. */
-
-void
-expand_builtin_longjmp (buf_addr, value)
- rtx buf_addr, value;
+static void
+expand_builtin_longjmp (rtx buf_addr, rtx value)
{
- rtx fp, lab, stack, insn;
+ rtx fp, lab, stack, insn, last;
enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
+ /* DRAP is needed for stack realign if longjmp is expanded to current
+ function */
+ if (SUPPORTS_STACK_ALIGNMENT)
+ crtl->need_drap = true;
+
if (setjmp_alias_set == -1)
setjmp_alias_set = new_alias_set ();
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (buf_addr) != Pmode)
- buf_addr = convert_memory_address (Pmode, buf_addr);
-#endif
+ buf_addr = convert_memory_address (Pmode, buf_addr);
buf_addr = force_reg (Pmode, buf_addr);
a second argument of 1, because that is what builtin_setjmp will
return. This also makes EH slightly more efficient, since we are no
longer copying around a value that we don't care about. */
- if (value != const1_rtx)
- abort ();
-
- current_function_calls_longjmp = 1;
+ gcc_assert (value == const1_rtx);
+ last = get_last_insn ();
#ifdef HAVE_builtin_longjmp
if (HAVE_builtin_longjmp)
emit_insn (gen_builtin_longjmp (buf_addr));
/* Pick up FP, label, and SP from the block and jump. This code is
from expand_goto in stmt.c; see there for detailed comments. */
-#if HAVE_nonlocal_goto
+#ifdef HAVE_nonlocal_goto
if (HAVE_nonlocal_goto)
/* We have to pass a value to the nonlocal_goto pattern that will
get copied into the static_chain pointer, but it does not matter
{
lab = copy_to_reg (lab);
+ emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)));
+ emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx));
+
emit_move_insn (hard_frame_pointer_rtx, fp);
emit_stack_restore (SAVE_NONLOCAL, stack, NULL_RTX);
- emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
- emit_insn (gen_rtx_USE (VOIDmode, stack_pointer_rtx));
+ emit_use (hard_frame_pointer_rtx);
+ emit_use (stack_pointer_rtx);
emit_indirect_jump (lab);
}
}
internal exception handling use only. */
for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
{
- if (GET_CODE (insn) == JUMP_INSN)
+ gcc_assert (insn != last);
+
+ if (JUMP_P (insn))
+ {
+ add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
+ break;
+ }
+ else if (CALL_P (insn))
+ break;
+ }
+}
+
+/* Expand a call to __builtin_nonlocal_goto. We're passed the target label
+ and the address of the save area. */
+
+static rtx
+expand_builtin_nonlocal_goto (tree exp)
+{
+ tree t_label, t_save_area;
+ rtx r_label, r_save_area, r_fp, r_sp, insn;
+
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ t_label = CALL_EXPR_ARG (exp, 0);
+ t_save_area = CALL_EXPR_ARG (exp, 1);
+
+ r_label = expand_normal (t_label);
+ r_label = convert_memory_address (Pmode, r_label);
+ r_save_area = expand_normal (t_save_area);
+ r_save_area = convert_memory_address (Pmode, r_save_area);
+ /* Copy the address of the save location to a register just in case it was based
+ on the frame pointer. */
+ r_save_area = copy_to_reg (r_save_area);
+ r_fp = gen_rtx_MEM (Pmode, r_save_area);
+ r_sp = gen_rtx_MEM (STACK_SAVEAREA_MODE (SAVE_NONLOCAL),
+ plus_constant (r_save_area, GET_MODE_SIZE (Pmode)));
+
+ crtl->has_nonlocal_goto = 1;
+
+#ifdef HAVE_nonlocal_goto
+ /* ??? We no longer need to pass the static chain value, afaik. */
+ if (HAVE_nonlocal_goto)
+ emit_insn (gen_nonlocal_goto (const0_rtx, r_label, r_sp, r_fp));
+ else
+#endif
+ {
+ r_label = copy_to_reg (r_label);
+
+ emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode)));
+ emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx));
+
+ /* Restore frame pointer for containing function.
+ This sets the actual hard register used for the frame pointer
+ to the location of the function's incoming static chain info.
+ The non-local goto handler will then adjust it to contain the
+ proper value and reload the argument pointer, if needed. */
+ emit_move_insn (hard_frame_pointer_rtx, r_fp);
+ emit_stack_restore (SAVE_NONLOCAL, r_sp, NULL_RTX);
+
+ /* USE of hard_frame_pointer_rtx added for consistency;
+ not clear if really needed. */
+ emit_use (hard_frame_pointer_rtx);
+ emit_use (stack_pointer_rtx);
+
+ /* If the architecture is using a GP register, we must
+ conservatively assume that the target function makes use of it.
+ The prologue of functions with nonlocal gotos must therefore
+ initialize the GP register to the appropriate value, and we
+ must then make sure that this value is live at the point
+ of the jump. (Note that this doesn't necessarily apply
+ to targets with a nonlocal_goto pattern; they are free
+ to implement it in their own way. Note also that this is
+ a no-op if the GP register is a global invariant.) */
+ if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM
+ && fixed_regs[PIC_OFFSET_TABLE_REGNUM])
+ emit_use (pic_offset_table_rtx);
+
+ emit_indirect_jump (r_label);
+ }
+
+ /* Search backwards to the jump insn and mark it as a
+ non-local goto. */
+ for (insn = get_last_insn (); insn; insn = PREV_INSN (insn))
+ {
+ if (JUMP_P (insn))
{
- REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx,
- REG_NOTES (insn));
+ add_reg_note (insn, REG_NON_LOCAL_GOTO, const0_rtx);
break;
}
- else if (GET_CODE (insn) == CALL_INSN)
- break;
+ else if (CALL_P (insn))
+ break;
}
+
+ return const0_rtx;
+}
+
+/* __builtin_update_setjmp_buf is passed a pointer to an array of five words
+ (not all will be used on all machines) that was passed to __builtin_setjmp.
+ It updates the stack pointer in that block to correspond to the current
+ stack pointer. */
+
+static void
+expand_builtin_update_setjmp_buf (rtx buf_addr)
+{
+ enum machine_mode sa_mode = Pmode;
+ rtx stack_save;
+
+
+#ifdef HAVE_save_stack_nonlocal
+ if (HAVE_save_stack_nonlocal)
+ sa_mode = insn_data[(int) CODE_FOR_save_stack_nonlocal].operand[0].mode;
+#endif
+#ifdef STACK_SAVEAREA_MODE
+ sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
+#endif
+
+ stack_save
+ = gen_rtx_MEM (sa_mode,
+ memory_address
+ (sa_mode,
+ plus_constant (buf_addr, 2 * GET_MODE_SIZE (Pmode))));
+
+#ifdef HAVE_setjmp
+ if (HAVE_setjmp)
+ emit_insn (gen_setjmp ());
+#endif
+
+ emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
}
/* Expand a call to __builtin_prefetch. For a target that does not support
effects. */
static void
-expand_builtin_prefetch (arglist)
- tree arglist;
+expand_builtin_prefetch (tree exp)
{
tree arg0, arg1, arg2;
+ int nargs;
rtx op0, op1, op2;
- if (!validate_arglist (arglist, POINTER_TYPE, 0))
+ if (!validate_arglist (exp, POINTER_TYPE, 0))
return;
- arg0 = TREE_VALUE (arglist);
+ arg0 = CALL_EXPR_ARG (exp, 0);
+
/* Arguments 1 and 2 are optional; argument 1 (read/write) defaults to
zero (read) and argument 2 (locality) defaults to 3 (high degree of
locality). */
- if (TREE_CHAIN (arglist))
- {
- arg1 = TREE_VALUE (TREE_CHAIN (arglist));
- if (TREE_CHAIN (TREE_CHAIN (arglist)))
- arg2 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- else
- arg2 = build_int_2 (3, 0);
- }
+ nargs = call_expr_nargs (exp);
+ if (nargs > 1)
+ arg1 = CALL_EXPR_ARG (exp, 1);
else
- {
- arg1 = integer_zero_node;
- arg2 = build_int_2 (3, 0);
- }
+ arg1 = integer_zero_node;
+ if (nargs > 2)
+ arg2 = CALL_EXPR_ARG (exp, 2);
+ else
+ arg2 = build_int_cst (NULL_TREE, 3);
/* Argument 0 is an address. */
op0 = expand_expr (arg0, NULL_RTX, Pmode, EXPAND_NORMAL);
/* Argument 1 (read/write flag) must be a compile-time constant int. */
if (TREE_CODE (arg1) != INTEGER_CST)
{
- error ("second arg to `__builtin_prefetch' must be a constant");
- arg1 = integer_zero_node;
+ error ("second argument to %<__builtin_prefetch%> must be a constant");
+ arg1 = integer_zero_node;
}
- op1 = expand_expr (arg1, NULL_RTX, VOIDmode, 0);
+ op1 = expand_normal (arg1);
/* Argument 1 must be either zero or one. */
if (INTVAL (op1) != 0 && INTVAL (op1) != 1)
{
- warning ("invalid second arg to __builtin_prefetch; using zero");
+ warning (0, "invalid second argument to %<__builtin_prefetch%>;"
+ " using zero");
op1 = const0_rtx;
}
/* Argument 2 (locality) must be a compile-time constant int. */
if (TREE_CODE (arg2) != INTEGER_CST)
{
- error ("third arg to `__builtin_prefetch' must be a constant");
+ error ("third argument to %<__builtin_prefetch%> must be a constant");
arg2 = integer_zero_node;
}
- op2 = expand_expr (arg2, NULL_RTX, VOIDmode, 0);
+ op2 = expand_normal (arg2);
/* Argument 2 must be 0, 1, 2, or 3. */
if (INTVAL (op2) < 0 || INTVAL (op2) > 3)
{
- warning ("invalid third arg to __builtin_prefetch; using zero");
+ warning (0, "invalid third argument to %<__builtin_prefetch%>; using zero");
op2 = const0_rtx;
}
#ifdef HAVE_prefetch
if (HAVE_prefetch)
{
- if (! (*insn_data[(int)CODE_FOR_prefetch].operand[0].predicate)
- (op0,
- insn_data[(int)CODE_FOR_prefetch].operand[0].mode))
- op0 = force_reg (Pmode, op0);
+ if ((! (*insn_data[(int) CODE_FOR_prefetch].operand[0].predicate)
+ (op0,
+ insn_data[(int) CODE_FOR_prefetch].operand[0].mode))
+ || (GET_MODE (op0) != Pmode))
+ {
+ op0 = convert_memory_address (Pmode, op0);
+ op0 = force_reg (Pmode, op0);
+ }
emit_insn (gen_prefetch (op0, op1, op2));
}
- else
#endif
- op0 = protect_from_queue (op0, 0);
- /* Don't do anything with direct references to volatile memory, but
- generate code to handle other side effects. */
- if (GET_CODE (op0) != MEM && side_effects_p (op0))
- emit_insn (op0);
+
+ /* Don't do anything with direct references to volatile memory, but
+ generate code to handle other side effects. */
+ if (!MEM_P (op0) && side_effects_p (op0))
+ emit_insn (op0);
}
/* Get a MEM rtx for expression EXP which is the address of an operand
- to be used to be used in a string instruction (cmpstrsi, movstrsi, ..). */
+ to be used in a string instruction (cmpstrsi, movmemsi, ..). LEN is
+ the maximum length of the block of memory that might be accessed or
+ NULL if unknown. */
static rtx
-get_memory_rtx (exp)
- tree exp;
+get_memory_rtx (tree exp, tree len)
{
- rtx addr = expand_expr (exp, NULL_RTX, ptr_mode, EXPAND_SUM);
- rtx mem;
+ tree orig_exp = exp;
+ rtx addr, mem;
+ HOST_WIDE_INT off;
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (addr) != Pmode)
- addr = convert_memory_address (Pmode, addr);
-#endif
+ /* When EXP is not resolved SAVE_EXPR, MEM_ATTRS can be still derived
+ from its expression, for expr->a.b only <variable>.a.b is recorded. */
+ if (TREE_CODE (exp) == SAVE_EXPR && !SAVE_EXPR_RESOLVED_P (exp))
+ exp = TREE_OPERAND (exp, 0);
+ addr = expand_expr (orig_exp, NULL_RTX, ptr_mode, EXPAND_NORMAL);
mem = gen_rtx_MEM (BLKmode, memory_address (BLKmode, addr));
/* Get an expression we can use to find the attributes to assign to MEM.
If it is an ADDR_EXPR, use the operand. Otherwise, dereference it if
we can. First remove any nops. */
- while ((TREE_CODE (exp) == NOP_EXPR || TREE_CODE (exp) == CONVERT_EXPR
- || TREE_CODE (exp) == NON_LVALUE_EXPR)
+ while (CONVERT_EXPR_P (exp)
&& POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (exp, 0))))
exp = TREE_OPERAND (exp, 0);
- if (TREE_CODE (exp) == ADDR_EXPR)
- {
- exp = TREE_OPERAND (exp, 0);
- set_mem_attributes (mem, exp, 0);
- }
+ off = 0;
+ if (TREE_CODE (exp) == POINTER_PLUS_EXPR
+ && TREE_CODE (TREE_OPERAND (exp, 0)) == ADDR_EXPR
+ && host_integerp (TREE_OPERAND (exp, 1), 0)
+ && (off = tree_low_cst (TREE_OPERAND (exp, 1), 0)) > 0)
+ exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
+ else if (TREE_CODE (exp) == ADDR_EXPR)
+ exp = TREE_OPERAND (exp, 0);
else if (POINTER_TYPE_P (TREE_TYPE (exp)))
+ exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
+ else
+ exp = NULL;
+
+ /* Honor attributes derived from exp, except for the alias set
+ (as builtin stringops may alias with anything) and the size
+ (as stringops may access multiple array elements). */
+ if (exp)
{
- exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp);
- /* memcpy, memset and other builtin stringops can alias with anything. */
+ set_mem_attributes (mem, exp, 0);
+
+ if (off)
+ mem = adjust_automodify_address_nv (mem, BLKmode, NULL, off);
+
+ /* Allow the string and memory builtins to overflow from one
+ field into another, see http://gcc.gnu.org/PR23561.
+ Thus avoid COMPONENT_REFs in MEM_EXPR unless we know the whole
+ memory accessed by the string or memory builtin will fit
+ within the field. */
+ if (MEM_EXPR (mem) && TREE_CODE (MEM_EXPR (mem)) == COMPONENT_REF)
+ {
+ tree mem_expr = MEM_EXPR (mem);
+ HOST_WIDE_INT offset = -1, length = -1;
+ tree inner = exp;
+
+ while (TREE_CODE (inner) == ARRAY_REF
+ || CONVERT_EXPR_P (inner)
+ || TREE_CODE (inner) == VIEW_CONVERT_EXPR
+ || TREE_CODE (inner) == SAVE_EXPR)
+ inner = TREE_OPERAND (inner, 0);
+
+ gcc_assert (TREE_CODE (inner) == COMPONENT_REF);
+
+ if (MEM_OFFSET (mem)
+ && GET_CODE (MEM_OFFSET (mem)) == CONST_INT)
+ offset = INTVAL (MEM_OFFSET (mem));
+
+ if (offset >= 0 && len && host_integerp (len, 0))
+ length = tree_low_cst (len, 0);
+
+ while (TREE_CODE (inner) == COMPONENT_REF)
+ {
+ tree field = TREE_OPERAND (inner, 1);
+ gcc_assert (TREE_CODE (mem_expr) == COMPONENT_REF);
+ gcc_assert (field == TREE_OPERAND (mem_expr, 1));
+
+ /* Bitfields are generally not byte-addressable. */
+ gcc_assert (!DECL_BIT_FIELD (field)
+ || ((tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
+ % BITS_PER_UNIT) == 0
+ && host_integerp (DECL_SIZE (field), 0)
+ && (TREE_INT_CST_LOW (DECL_SIZE (field))
+ % BITS_PER_UNIT) == 0));
+
+ /* If we can prove that the memory starting at XEXP (mem, 0) and
+ ending at XEXP (mem, 0) + LENGTH will fit into this field, we
+ can keep the COMPONENT_REF in MEM_EXPR. But be careful with
+ fields without DECL_SIZE_UNIT like flexible array members. */
+ if (length >= 0
+ && DECL_SIZE_UNIT (field)
+ && host_integerp (DECL_SIZE_UNIT (field), 0))
+ {
+ HOST_WIDE_INT size
+ = TREE_INT_CST_LOW (DECL_SIZE_UNIT (field));
+ if (offset <= size
+ && length <= size
+ && offset + length <= size)
+ break;
+ }
+
+ if (offset >= 0
+ && host_integerp (DECL_FIELD_OFFSET (field), 0))
+ offset += TREE_INT_CST_LOW (DECL_FIELD_OFFSET (field))
+ + tree_low_cst (DECL_FIELD_BIT_OFFSET (field), 1)
+ / BITS_PER_UNIT;
+ else
+ {
+ offset = -1;
+ length = -1;
+ }
+
+ mem_expr = TREE_OPERAND (mem_expr, 0);
+ inner = TREE_OPERAND (inner, 0);
+ }
+
+ if (mem_expr == NULL)
+ offset = -1;
+ if (mem_expr != MEM_EXPR (mem))
+ {
+ set_mem_expr (mem, mem_expr);
+ set_mem_offset (mem, offset >= 0 ? GEN_INT (offset) : NULL_RTX);
+ }
+ }
set_mem_alias_set (mem, 0);
+ set_mem_size (mem, NULL_RTX);
}
return mem;
used for calling a function. */
static int apply_args_reg_offset[FIRST_PSEUDO_REGISTER];
-/* Return the offset of register REGNO into the block returned by
- __builtin_apply_args. This is not declared static, since it is
- needed in objc-act.c. */
-
-int
-apply_args_register_offset (regno)
- int regno;
-{
- apply_args_size ();
-
- /* Arguments are always put in outgoing registers (in the argument
- block) if such make sense. */
-#ifdef OUTGOING_REGNO
- regno = OUTGOING_REGNO(regno);
-#endif
- return apply_args_reg_offset[regno];
-}
-
/* Return the size required for the block returned by __builtin_apply_args,
and initialize apply_args_mode. */
static int
-apply_args_size ()
+apply_args_size (void)
{
static int size = -1;
int align;
/* The second value is the structure value address unless this is
passed as an "invisible" first argument. */
- if (struct_value_rtx)
+ if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0))
size += GET_MODE_SIZE (Pmode);
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (FUNCTION_ARG_REGNO_P (regno))
{
- /* Search for the proper mode for copying this register's
- value. I'm not sure this is right, but it works so far. */
- enum machine_mode best_mode = VOIDmode;
-
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && HARD_REGNO_NREGS (regno, mode) == 1)
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- mode = best_mode;
- if (mode == VOIDmode)
- abort ();
+ mode = reg_raw_mode[regno];
+
+ gcc_assert (mode != VOIDmode);
align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
if (size % align != 0)
and initialize apply_result_mode. */
static int
-apply_result_size ()
+apply_result_size (void)
{
static int size = -1;
int align, regno;
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if (FUNCTION_VALUE_REGNO_P (regno))
{
- /* Search for the proper mode for copying this register's
- value. I'm not sure this is right, but it works so far. */
- enum machine_mode best_mode = VOIDmode;
-
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
- mode != TImode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_FLOAT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- if (best_mode == VOIDmode)
- for (mode = GET_CLASS_NARROWEST_MODE (MODE_VECTOR_INT);
- mode != VOIDmode;
- mode = GET_MODE_WIDER_MODE (mode))
- if (HARD_REGNO_MODE_OK (regno, mode)
- && have_insn_for (SET, mode))
- best_mode = mode;
-
- mode = best_mode;
- if (mode == VOIDmode)
- abort ();
+ mode = reg_raw_mode[regno];
+
+ gcc_assert (mode != VOIDmode);
align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
if (size % align != 0)
restore the values. */
static rtx
-result_vector (savep, result)
- int savep;
- rtx result;
+result_vector (int savep, rtx result)
{
int regno, size, align, nelts;
enum machine_mode mode;
rtx reg, mem;
- rtx *savevec = (rtx *) alloca (FIRST_PSEUDO_REGISTER * sizeof (rtx));
+ rtx *savevec = XALLOCAVEC (rtx, FIRST_PSEUDO_REGISTER);
size = nelts = 0;
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
arguments as were passed to the current function. */
static rtx
-expand_builtin_apply_args_1 ()
+expand_builtin_apply_args_1 (void)
{
- rtx registers;
+ rtx registers, tem;
int size, align, regno;
enum machine_mode mode;
+ rtx struct_incoming_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 1);
/* Create a block where the arg-pointer, structure value address,
and argument registers can be saved. */
/* Walk past the arg-pointer and structure value address. */
size = GET_MODE_SIZE (Pmode);
- if (struct_value_rtx)
+ if (targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0))
size += GET_MODE_SIZE (Pmode);
/* Save each register used in calling a function to the block. */
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if ((mode = apply_args_mode[regno]) != VOIDmode)
{
- rtx tem;
-
align = GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT;
if (size % align != 0)
size = CEIL (size, align) * align;
}
/* Save the arg pointer to the block. */
- emit_move_insn (adjust_address (registers, Pmode, 0),
- copy_to_reg (virtual_incoming_args_rtx));
+ tem = copy_to_reg (crtl->args.internal_arg_pointer);
+#ifdef STACK_GROWS_DOWNWARD
+ /* We need the pointer as the caller actually passed them to us, not
+ as we might have pretended they were passed. Make sure it's a valid
+ operand, as emit_move_insn isn't expected to handle a PLUS. */
+ tem
+ = force_operand (plus_constant (tem, crtl->args.pretend_args_size),
+ NULL_RTX);
+#endif
+ emit_move_insn (adjust_address (registers, Pmode, 0), tem);
+
size = GET_MODE_SIZE (Pmode);
/* Save the structure value address unless this is passed as an
"invisible" first argument. */
- if (struct_value_incoming_rtx)
+ if (struct_incoming_value)
{
emit_move_insn (adjust_address (registers, Pmode, size),
- copy_to_reg (struct_value_incoming_rtx));
+ copy_to_reg (struct_incoming_value));
size += GET_MODE_SIZE (Pmode);
}
saved. */
static rtx
-expand_builtin_apply_args ()
+expand_builtin_apply_args (void)
{
/* Don't do __builtin_apply_args more than once in a function.
Save the result of the first call and reuse it. */
apply_args_value = temp;
- /* Put the sequence after the NOTE that starts the function.
- If this is inside a SEQUENCE, make the outer-level insn
+ /* Put the insns after the NOTE that starts the function.
+ If this is inside a start_sequence, make the outer-level insn
chain current, so the code is placed at the start of the
- function. */
+ function. If internal_arg_pointer is a non-virtual pseudo,
+ it needs to be placed after the function that initializes
+ that pseudo. */
push_topmost_sequence ();
- emit_insns_before (seq, NEXT_INSN (get_insns ()));
+ if (REG_P (crtl->args.internal_arg_pointer)
+ && REGNO (crtl->args.internal_arg_pointer) > LAST_VIRTUAL_REGISTER)
+ emit_insn_before (seq, parm_birth_insn);
+ else
+ emit_insn_before (seq, NEXT_INSN (entry_of_function ()));
pop_topmost_sequence ();
return temp;
}
untyped return of whatever value was returned by the given function. */
static rtx
-expand_builtin_apply (function, arguments, argsize)
- rtx function, arguments, argsize;
+expand_builtin_apply (rtx function, rtx arguments, rtx argsize)
{
int size, align, regno;
enum machine_mode mode;
rtx incoming_args, result, reg, dest, src, call_insn;
rtx old_stack_level = 0;
rtx call_fusage = 0;
+ rtx struct_value = targetm.calls.struct_value_rtx (cfun ? TREE_TYPE (cfun->decl) : 0, 0);
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (arguments) != Pmode)
- arguments = convert_memory_address (Pmode, arguments);
-#endif
+ arguments = convert_memory_address (Pmode, arguments);
/* Create a block where the return registers can be saved. */
result = assign_stack_local (BLKmode, apply_result_size (), -1);
incoming_args, 0, OPTAB_LIB_WIDEN);
#endif
- /* Perform postincrements before actually calling the function. */
- emit_queue ();
-
/* Push a new argument block and copy the arguments. Do not allow
the (potential) memcpy call below to interfere with our stack
manipulations. */
do_pending_stack_adjust ();
NO_DEFER_POP;
- /* Save the stack with nonlocal if available */
+ /* Save the stack with nonlocal if available. */
#ifdef HAVE_save_stack_nonlocal
if (HAVE_save_stack_nonlocal)
emit_stack_save (SAVE_NONLOCAL, &old_stack_level, NULL_RTX);
#endif
emit_stack_save (SAVE_BLOCK, &old_stack_level, NULL_RTX);
- /* Push a block of memory onto the stack to store the memory arguments.
- Save the address in a register, and copy the memory arguments. ??? I
- haven't figured out how the calling convention macros effect this,
- but it's likely that the source and/or destination addresses in
- the block copy will need updating in machine specific ways. */
- dest = allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT);
+ /* Allocate a block of memory onto the stack and copy the memory
+ arguments to the outgoing arguments address. */
+ allocate_dynamic_stack_space (argsize, 0, BITS_PER_UNIT);
+
+ /* Set DRAP flag to true, even though allocate_dynamic_stack_space
+ may have already set current_function_calls_alloca to true.
+ current_function_calls_alloca won't be set if argsize is zero,
+ so we have to guarantee need_drap is true here. */
+ if (SUPPORTS_STACK_ALIGNMENT)
+ crtl->need_drap = true;
+
+ dest = virtual_outgoing_args_rtx;
+#ifndef STACK_GROWS_DOWNWARD
+ if (GET_CODE (argsize) == CONST_INT)
+ dest = plus_constant (dest, -INTVAL (argsize));
+ else
+ dest = gen_rtx_PLUS (Pmode, dest, negate_rtx (Pmode, argsize));
+#endif
dest = gen_rtx_MEM (BLKmode, dest);
set_mem_align (dest, PARM_BOUNDARY);
src = gen_rtx_MEM (BLKmode, incoming_args);
set_mem_align (src, PARM_BOUNDARY);
- emit_block_move (dest, src, argsize);
+ emit_block_move (dest, src, argsize, BLOCK_OP_NORMAL);
/* Refer to the argument block. */
apply_args_size ();
/* Walk past the arg-pointer and structure value address. */
size = GET_MODE_SIZE (Pmode);
- if (struct_value_rtx)
+ if (struct_value)
size += GET_MODE_SIZE (Pmode);
/* Restore each of the registers previously saved. Make USE insns
/* Restore the structure value address unless this is passed as an
"invisible" first argument. */
size = GET_MODE_SIZE (Pmode);
- if (struct_value_rtx)
+ if (struct_value)
{
rtx value = gen_reg_rtx (Pmode);
emit_move_insn (value, adjust_address (arguments, Pmode, size));
- emit_move_insn (struct_value_rtx, value);
- if (GET_CODE (struct_value_rtx) == REG)
- use_reg (&call_fusage, struct_value_rtx);
+ emit_move_insn (struct_value, value);
+ if (REG_P (struct_value))
+ use_reg (&call_fusage, struct_value);
size += GET_MODE_SIZE (Pmode);
}
/* All arguments and registers used for the call are set up by now! */
- function = prepare_call_address (function, NULL_TREE, &call_fusage, 0, 0);
+ function = prepare_call_address (function, NULL, &call_fusage, 0, 0);
/* Ensure address is valid. SYMBOL_REF is already valid, so no need,
and we don't want to load it into a register as an optimization,
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if ((mode = apply_result_mode[regno]) != VOIDmode)
{
- if (valreg)
- abort (); /* HAVE_untyped_call required. */
+ gcc_assert (!valreg); /* HAVE_untyped_call required. */
+
valreg = gen_rtx_REG (mode, regno);
}
}
else
#endif
- abort ();
-
- /* Find the CALL insn we just emitted. */
- for (call_insn = get_last_insn ();
- call_insn && GET_CODE (call_insn) != CALL_INSN;
- call_insn = PREV_INSN (call_insn))
- ;
-
- if (! call_insn)
- abort ();
-
- /* Put the register usage information on the CALL. If there is already
- some usage information, put ours at the end. */
- if (CALL_INSN_FUNCTION_USAGE (call_insn))
- {
- rtx link;
-
- for (link = CALL_INSN_FUNCTION_USAGE (call_insn); XEXP (link, 1) != 0;
- link = XEXP (link, 1))
- ;
+ gcc_unreachable ();
- XEXP (link, 1) = call_fusage;
- }
- else
- CALL_INSN_FUNCTION_USAGE (call_insn) = call_fusage;
+ /* Find the CALL insn we just emitted, and attach the register usage
+ information. */
+ call_insn = last_call_insn ();
+ add_function_usage_to (call_insn, call_fusage);
/* Restore the stack. */
#ifdef HAVE_save_stack_nonlocal
OK_DEFER_POP;
/* Return the address of the result block. */
- return copy_addr_to_reg (XEXP (result, 0));
+ result = copy_addr_to_reg (XEXP (result, 0));
+ return convert_memory_address (ptr_mode, result);
}
/* Perform an untyped return. */
static void
-expand_builtin_return (result)
- rtx result;
+expand_builtin_return (rtx result)
{
int size, align, regno;
enum machine_mode mode;
rtx reg;
rtx call_fusage = 0;
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (result) != Pmode)
- result = convert_memory_address (Pmode, result);
-#endif
+ result = convert_memory_address (Pmode, result);
apply_result_size ();
result = gen_rtx_MEM (BLKmode, result);
emit_move_insn (reg, adjust_address (result, mode, size));
push_to_sequence (call_fusage);
- emit_insn (gen_rtx_USE (VOIDmode, reg));
+ emit_use (reg);
call_fusage = get_insns ();
end_sequence ();
size += GET_MODE_SIZE (mode);
}
/* Put the USE insns before the return. */
- emit_insns (call_fusage);
+ emit_insn (call_fusage);
/* Return whatever values was restored by jumping directly to the end
of the function. */
- expand_null_return ();
+ expand_naked_return ();
}
/* Used by expand_builtin_classify_type and fold_builtin_classify_type. */
static enum type_class
-type_to_class (type)
- tree type;
+type_to_class (tree type)
{
switch (TREE_CODE (type))
{
case VOID_TYPE: return void_type_class;
case INTEGER_TYPE: return integer_type_class;
- case CHAR_TYPE: return char_type_class;
case ENUMERAL_TYPE: return enumeral_type_class;
case BOOLEAN_TYPE: return boolean_type_class;
case POINTER_TYPE: return pointer_type_class;
case QUAL_UNION_TYPE: return union_type_class;
case ARRAY_TYPE: return (TYPE_STRING_FLAG (type)
? string_type_class : array_type_class);
- case SET_TYPE: return set_type_class;
- case FILE_TYPE: return file_type_class;
case LANG_TYPE: return lang_type_class;
default: return no_type_class;
}
}
-/* Expand a call to __builtin_classify_type with arguments found in
- ARGLIST. */
+/* Expand a call EXP to __builtin_classify_type. */
static rtx
-expand_builtin_classify_type (arglist)
- tree arglist;
+expand_builtin_classify_type (tree exp)
{
- if (arglist != 0)
- return GEN_INT (type_to_class (TREE_TYPE (TREE_VALUE (arglist))));
+ if (call_expr_nargs (exp))
+ return GEN_INT (type_to_class (TREE_TYPE (CALL_EXPR_ARG (exp, 0))));
return GEN_INT (no_type_class);
}
-/* Expand expression EXP, which is a call to __builtin_constant_p. */
+/* This helper macro, meant to be used in mathfn_built_in below,
+ determines which among a set of three builtin math functions is
+ appropriate for a given type mode. The `F' and `L' cases are
+ automatically generated from the `double' case. */
+#define CASE_MATHFN(BUILT_IN_MATHFN) \
+ case BUILT_IN_MATHFN: case BUILT_IN_MATHFN##F: case BUILT_IN_MATHFN##L: \
+ fcode = BUILT_IN_MATHFN; fcodef = BUILT_IN_MATHFN##F ; \
+ fcodel = BUILT_IN_MATHFN##L ; break;
+/* Similar to above, but appends _R after any F/L suffix. */
+#define CASE_MATHFN_REENT(BUILT_IN_MATHFN) \
+ case BUILT_IN_MATHFN##_R: case BUILT_IN_MATHFN##F_R: case BUILT_IN_MATHFN##L_R: \
+ fcode = BUILT_IN_MATHFN##_R; fcodef = BUILT_IN_MATHFN##F_R ; \
+ fcodel = BUILT_IN_MATHFN##L_R ; break;
+
+/* Return mathematic function equivalent to FN but operating directly
+ on TYPE, if available. If IMPLICIT is true find the function in
+ implicit_built_in_decls[], otherwise use built_in_decls[]. If we
+ can't do the conversion, return zero. */
-static rtx
-expand_builtin_constant_p (exp)
- tree exp;
+static tree
+mathfn_built_in_1 (tree type, enum built_in_function fn, bool implicit)
{
- tree arglist = TREE_OPERAND (exp, 1);
- enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp));
- rtx tmp;
+ tree const *const fn_arr
+ = implicit ? implicit_built_in_decls : built_in_decls;
+ enum built_in_function fcode, fcodef, fcodel;
- if (arglist == 0)
- return const0_rtx;
- arglist = TREE_VALUE (arglist);
+ switch (fn)
+ {
+ CASE_MATHFN (BUILT_IN_ACOS)
+ CASE_MATHFN (BUILT_IN_ACOSH)
+ CASE_MATHFN (BUILT_IN_ASIN)
+ CASE_MATHFN (BUILT_IN_ASINH)
+ CASE_MATHFN (BUILT_IN_ATAN)
+ CASE_MATHFN (BUILT_IN_ATAN2)
+ CASE_MATHFN (BUILT_IN_ATANH)
+ CASE_MATHFN (BUILT_IN_CBRT)
+ CASE_MATHFN (BUILT_IN_CEIL)
+ CASE_MATHFN (BUILT_IN_CEXPI)
+ CASE_MATHFN (BUILT_IN_COPYSIGN)
+ CASE_MATHFN (BUILT_IN_COS)
+ CASE_MATHFN (BUILT_IN_COSH)
+ CASE_MATHFN (BUILT_IN_DREM)
+ CASE_MATHFN (BUILT_IN_ERF)
+ CASE_MATHFN (BUILT_IN_ERFC)
+ CASE_MATHFN (BUILT_IN_EXP)
+ CASE_MATHFN (BUILT_IN_EXP10)
+ CASE_MATHFN (BUILT_IN_EXP2)
+ CASE_MATHFN (BUILT_IN_EXPM1)
+ CASE_MATHFN (BUILT_IN_FABS)
+ CASE_MATHFN (BUILT_IN_FDIM)
+ CASE_MATHFN (BUILT_IN_FLOOR)
+ CASE_MATHFN (BUILT_IN_FMA)
+ CASE_MATHFN (BUILT_IN_FMAX)
+ CASE_MATHFN (BUILT_IN_FMIN)
+ CASE_MATHFN (BUILT_IN_FMOD)
+ CASE_MATHFN (BUILT_IN_FREXP)
+ CASE_MATHFN (BUILT_IN_GAMMA)
+ CASE_MATHFN_REENT (BUILT_IN_GAMMA) /* GAMMA_R */
+ CASE_MATHFN (BUILT_IN_HUGE_VAL)
+ CASE_MATHFN (BUILT_IN_HYPOT)
+ CASE_MATHFN (BUILT_IN_ILOGB)
+ CASE_MATHFN (BUILT_IN_INF)
+ CASE_MATHFN (BUILT_IN_ISINF)
+ CASE_MATHFN (BUILT_IN_J0)
+ CASE_MATHFN (BUILT_IN_J1)
+ CASE_MATHFN (BUILT_IN_JN)
+ CASE_MATHFN (BUILT_IN_LCEIL)
+ CASE_MATHFN (BUILT_IN_LDEXP)
+ CASE_MATHFN (BUILT_IN_LFLOOR)
+ CASE_MATHFN (BUILT_IN_LGAMMA)
+ CASE_MATHFN_REENT (BUILT_IN_LGAMMA) /* LGAMMA_R */
+ CASE_MATHFN (BUILT_IN_LLCEIL)
+ CASE_MATHFN (BUILT_IN_LLFLOOR)
+ CASE_MATHFN (BUILT_IN_LLRINT)
+ CASE_MATHFN (BUILT_IN_LLROUND)
+ CASE_MATHFN (BUILT_IN_LOG)
+ CASE_MATHFN (BUILT_IN_LOG10)
+ CASE_MATHFN (BUILT_IN_LOG1P)
+ CASE_MATHFN (BUILT_IN_LOG2)
+ CASE_MATHFN (BUILT_IN_LOGB)
+ CASE_MATHFN (BUILT_IN_LRINT)
+ CASE_MATHFN (BUILT_IN_LROUND)
+ CASE_MATHFN (BUILT_IN_MODF)
+ CASE_MATHFN (BUILT_IN_NAN)
+ CASE_MATHFN (BUILT_IN_NANS)
+ CASE_MATHFN (BUILT_IN_NEARBYINT)
+ CASE_MATHFN (BUILT_IN_NEXTAFTER)
+ CASE_MATHFN (BUILT_IN_NEXTTOWARD)
+ CASE_MATHFN (BUILT_IN_POW)
+ CASE_MATHFN (BUILT_IN_POWI)
+ CASE_MATHFN (BUILT_IN_POW10)
+ CASE_MATHFN (BUILT_IN_REMAINDER)
+ CASE_MATHFN (BUILT_IN_REMQUO)
+ CASE_MATHFN (BUILT_IN_RINT)
+ CASE_MATHFN (BUILT_IN_ROUND)
+ CASE_MATHFN (BUILT_IN_SCALB)
+ CASE_MATHFN (BUILT_IN_SCALBLN)
+ CASE_MATHFN (BUILT_IN_SCALBN)
+ CASE_MATHFN (BUILT_IN_SIGNBIT)
+ CASE_MATHFN (BUILT_IN_SIGNIFICAND)
+ CASE_MATHFN (BUILT_IN_SIN)
+ CASE_MATHFN (BUILT_IN_SINCOS)
+ CASE_MATHFN (BUILT_IN_SINH)
+ CASE_MATHFN (BUILT_IN_SQRT)
+ CASE_MATHFN (BUILT_IN_TAN)
+ CASE_MATHFN (BUILT_IN_TANH)
+ CASE_MATHFN (BUILT_IN_TGAMMA)
+ CASE_MATHFN (BUILT_IN_TRUNC)
+ CASE_MATHFN (BUILT_IN_Y0)
+ CASE_MATHFN (BUILT_IN_Y1)
+ CASE_MATHFN (BUILT_IN_YN)
- /* We have taken care of the easy cases during constant folding. This
- case is not obvious, so emit (constant_p_rtx (ARGLIST)) and let CSE get a
- chance to see if it can deduce whether ARGLIST is constant. */
+ default:
+ return NULL_TREE;
+ }
- tmp = expand_expr (arglist, NULL_RTX, VOIDmode, 0);
- tmp = gen_rtx_CONSTANT_P_RTX (value_mode, tmp);
- return tmp;
+ if (TYPE_MAIN_VARIANT (type) == double_type_node)
+ return fn_arr[fcode];
+ else if (TYPE_MAIN_VARIANT (type) == float_type_node)
+ return fn_arr[fcodef];
+ else if (TYPE_MAIN_VARIANT (type) == long_double_type_node)
+ return fn_arr[fcodel];
+ else
+ return NULL_TREE;
}
-/* Expand a call to one of the builtin math functions (sin, cos, or sqrt).
- Return 0 if a normal call should be emitted rather than expanding the
- function in-line. EXP is the expression that is a call to the builtin
- function; if convenient, the result should be placed in TARGET.
- SUBTARGET may be used as the target for computing one of EXP's operands. */
+/* Like mathfn_built_in_1(), but always use the implicit array. */
-static rtx
-expand_builtin_mathfn (exp, target, subtarget)
- tree exp;
- rtx target, subtarget;
+tree
+mathfn_built_in (tree type, enum built_in_function fn)
{
- optab builtin_optab;
- rtx op0, insns;
- tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
- tree arglist = TREE_OPERAND (exp, 1);
-
- if (!validate_arglist (arglist, REAL_TYPE, VOID_TYPE))
- return 0;
+ return mathfn_built_in_1 (type, fn, /*implicit=*/ 1);
+}
- /* Stabilize and compute the argument. */
- if (TREE_CODE (TREE_VALUE (arglist)) != VAR_DECL
- && TREE_CODE (TREE_VALUE (arglist)) != PARM_DECL)
- {
- exp = copy_node (exp);
- TREE_OPERAND (exp, 1) = arglist;
- /* Wrap the computation of the argument in a SAVE_EXPR. That
- way, if we need to expand the argument again (as in the
- flag_errno_math case below where we cannot directly set
- errno), we will not perform side-effects more than once.
- Note that here we're mutating the original EXP as well as the
- copy; that's the right thing to do in case the original EXP
- is expanded later. */
- TREE_VALUE (arglist) = save_expr (TREE_VALUE (arglist));
- arglist = copy_node (arglist);
- }
- op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0);
+/* If errno must be maintained, expand the RTL to check if the result,
+ TARGET, of a built-in function call, EXP, is NaN, and if so set
+ errno to EDOM. */
- /* Make a suitable register to place result in. */
- target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
+static void
+expand_errno_check (tree exp, rtx target)
+{
+ rtx lab = gen_label_rtx ();
- emit_queue ();
- start_sequence ();
+ /* Test the result; if it is NaN, set errno=EDOM because
+ the argument was not in the domain. */
+ emit_cmp_and_jump_insns (target, target, EQ, 0, GET_MODE (target),
+ 0, lab);
- switch (DECL_FUNCTION_CODE (fndecl))
+#ifdef TARGET_EDOM
+ /* If this built-in doesn't throw an exception, set errno directly. */
+ if (TREE_NOTHROW (TREE_OPERAND (CALL_EXPR_FN (exp), 0)))
{
- case BUILT_IN_SIN:
- case BUILT_IN_SINF:
- case BUILT_IN_SINL:
- builtin_optab = sin_optab; break;
- case BUILT_IN_COS:
- case BUILT_IN_COSF:
- case BUILT_IN_COSL:
- builtin_optab = cos_optab; break;
- case BUILT_IN_SQRT:
- case BUILT_IN_SQRTF:
- case BUILT_IN_SQRTL:
- builtin_optab = sqrt_optab; break;
- default:
- abort ();
+#ifdef GEN_ERRNO_RTX
+ rtx errno_rtx = GEN_ERRNO_RTX;
+#else
+ rtx errno_rtx
+ = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno"));
+#endif
+ emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM));
+ emit_label (lab);
+ return;
}
+#endif
- /* Compute into TARGET.
- Set TARGET to wherever the result comes back. */
- target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))),
- builtin_optab, op0, target, 0);
+ /* Make sure the library call isn't expanded as a tail call. */
+ CALL_EXPR_TAILCALL (exp) = 0;
- /* If we were unable to expand via the builtin, stop the
- sequence (without outputting the insns) and return 0, causing
- a call to the library function. */
- if (target == 0)
- {
- end_sequence ();
- return 0;
+ /* We can't set errno=EDOM directly; let the library call do it.
+ Pop the arguments right away in case the call gets deleted. */
+ NO_DEFER_POP;
+ expand_call (exp, target, 0);
+ OK_DEFER_POP;
+ emit_label (lab);
+}
+
+/* Expand a call to one of the builtin math functions (sqrt, exp, or log).
+ Return NULL_RTX if a normal call should be emitted rather than expanding
+ the function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's operands. */
+
+static rtx
+expand_builtin_mathfn (tree exp, rtx target, rtx subtarget)
+{
+ optab builtin_optab;
+ rtx op0, insns, before_call;
+ tree fndecl = get_callee_fndecl (exp);
+ enum machine_mode mode;
+ bool errno_set = false;
+ tree arg;
+
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_SQRT):
+ errno_set = ! tree_expr_nonnegative_p (arg);
+ builtin_optab = sqrt_optab;
+ break;
+ CASE_FLT_FN (BUILT_IN_EXP):
+ errno_set = true; builtin_optab = exp_optab; break;
+ CASE_FLT_FN (BUILT_IN_EXP10):
+ CASE_FLT_FN (BUILT_IN_POW10):
+ errno_set = true; builtin_optab = exp10_optab; break;
+ CASE_FLT_FN (BUILT_IN_EXP2):
+ errno_set = true; builtin_optab = exp2_optab; break;
+ CASE_FLT_FN (BUILT_IN_EXPM1):
+ errno_set = true; builtin_optab = expm1_optab; break;
+ CASE_FLT_FN (BUILT_IN_LOGB):
+ errno_set = true; builtin_optab = logb_optab; break;
+ CASE_FLT_FN (BUILT_IN_LOG):
+ errno_set = true; builtin_optab = log_optab; break;
+ CASE_FLT_FN (BUILT_IN_LOG10):
+ errno_set = true; builtin_optab = log10_optab; break;
+ CASE_FLT_FN (BUILT_IN_LOG2):
+ errno_set = true; builtin_optab = log2_optab; break;
+ CASE_FLT_FN (BUILT_IN_LOG1P):
+ errno_set = true; builtin_optab = log1p_optab; break;
+ CASE_FLT_FN (BUILT_IN_ASIN):
+ builtin_optab = asin_optab; break;
+ CASE_FLT_FN (BUILT_IN_ACOS):
+ builtin_optab = acos_optab; break;
+ CASE_FLT_FN (BUILT_IN_TAN):
+ builtin_optab = tan_optab; break;
+ CASE_FLT_FN (BUILT_IN_ATAN):
+ builtin_optab = atan_optab; break;
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ builtin_optab = floor_optab; break;
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ builtin_optab = ceil_optab; break;
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ builtin_optab = btrunc_optab; break;
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ builtin_optab = round_optab; break;
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ builtin_optab = nearbyint_optab;
+ if (flag_trapping_math)
+ break;
+ /* Else fallthrough and expand as rint. */
+ CASE_FLT_FN (BUILT_IN_RINT):
+ builtin_optab = rint_optab; break;
+ default:
+ gcc_unreachable ();
}
- /* If errno must be maintained and if we are not allowing unsafe
- math optimizations, check the result. */
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
+
+ if (! flag_errno_math || ! HONOR_NANS (mode))
+ errno_set = false;
- if (flag_errno_math && ! flag_unsafe_math_optimizations)
+ /* Before working hard, check whether the instruction is available. */
+ if (optab_handler (builtin_optab, mode)->insn_code != CODE_FOR_nothing)
{
- rtx lab1;
+ target = gen_reg_rtx (mode);
+
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- /* Don't define the builtin FP instructions
- if your machine is not IEEE. */
- if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT)
- abort ();
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
- lab1 = gen_label_rtx ();
+ start_sequence ();
- /* Test the result; if it is NaN, set errno=EDOM because
- the argument was not in the domain. */
- emit_cmp_and_jump_insns (target, target, EQ, 0, GET_MODE (target),
- 0, lab1);
+ /* Compute into TARGET.
+ Set TARGET to wherever the result comes back. */
+ target = expand_unop (mode, builtin_optab, op0, target, 0);
-#ifdef TARGET_EDOM
+ if (target != 0)
{
-#ifdef GEN_ERRNO_RTX
- rtx errno_rtx = GEN_ERRNO_RTX;
-#else
- rtx errno_rtx
- = gen_rtx_MEM (word_mode, gen_rtx_SYMBOL_REF (Pmode, "errno"));
-#endif
-
- emit_move_insn (errno_rtx, GEN_INT (TARGET_EDOM));
+ if (errno_set)
+ expand_errno_check (exp, target);
+
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+ return target;
}
-#else
- /* We can't set errno=EDOM directly; let the library call do it.
- Pop the arguments right away in case the call gets deleted. */
- NO_DEFER_POP;
- expand_call (exp, target, 0);
- OK_DEFER_POP;
-#endif
- emit_label (lab1);
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns) and call to the library function
+ with the stabilized argument list. */
+ end_sequence ();
}
- /* Output the entire sequence. */
- insns = get_insns ();
- end_sequence ();
- emit_insns (insns);
+ before_call = get_last_insn ();
- return target;
+ return expand_call (exp, target, target == const0_rtx);
}
-/* Expand expression EXP which is a call to the strlen builtin. Return 0
- if we failed the caller should emit a normal call, otherwise
- try to get the result in TARGET, if convenient. */
+/* Expand a call to the builtin binary math functions (pow and atan2).
+ Return NULL_RTX if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's
+ operands. */
static rtx
-expand_builtin_strlen (exp, target)
- tree exp;
- rtx target;
+expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget)
{
- tree arglist = TREE_OPERAND (exp, 1);
- enum machine_mode value_mode = TYPE_MODE (TREE_TYPE (exp));
+ optab builtin_optab;
+ rtx op0, op1, insns;
+ int op1_type = REAL_TYPE;
+ tree fndecl = get_callee_fndecl (exp);
+ tree arg0, arg1;
+ enum machine_mode mode;
+ bool errno_set = true;
- if (!validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ switch (DECL_FUNCTION_CODE (fndecl))
{
- rtx pat;
- tree src = TREE_VALUE (arglist);
+ CASE_FLT_FN (BUILT_IN_SCALBN):
+ CASE_FLT_FN (BUILT_IN_SCALBLN):
+ CASE_FLT_FN (BUILT_IN_LDEXP):
+ op1_type = INTEGER_TYPE;
+ default:
+ break;
+ }
- int align
- = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ if (!validate_arglist (exp, REAL_TYPE, op1_type, VOID_TYPE))
+ return NULL_RTX;
- rtx result, src_reg, char_rtx, before_strlen;
- enum machine_mode insn_mode = value_mode, char_mode;
- enum insn_code icode = CODE_FOR_nothing;
+ arg0 = CALL_EXPR_ARG (exp, 0);
+ arg1 = CALL_EXPR_ARG (exp, 1);
- /* If SRC is not a pointer type, don't do this operation inline. */
- if (align == 0)
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_POW):
+ builtin_optab = pow_optab; break;
+ CASE_FLT_FN (BUILT_IN_ATAN2):
+ builtin_optab = atan2_optab; break;
+ CASE_FLT_FN (BUILT_IN_SCALB):
+ if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (exp)))->b != 2)
return 0;
+ builtin_optab = scalb_optab; break;
+ CASE_FLT_FN (BUILT_IN_SCALBN):
+ CASE_FLT_FN (BUILT_IN_SCALBLN):
+ if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (exp)))->b != 2)
+ return 0;
+ /* Fall through... */
+ CASE_FLT_FN (BUILT_IN_LDEXP):
+ builtin_optab = ldexp_optab; break;
+ CASE_FLT_FN (BUILT_IN_FMOD):
+ builtin_optab = fmod_optab; break;
+ CASE_FLT_FN (BUILT_IN_REMAINDER):
+ CASE_FLT_FN (BUILT_IN_DREM):
+ builtin_optab = remainder_optab; break;
+ default:
+ gcc_unreachable ();
+ }
- /* Bail out if we can't compute strlen in the right mode. */
- while (insn_mode != VOIDmode)
- {
- icode = strlen_optab->handlers[(int) insn_mode].insn_code;
- if (icode != CODE_FOR_nothing)
- break;
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
- insn_mode = GET_MODE_WIDER_MODE (insn_mode);
- }
- if (insn_mode == VOIDmode)
- return 0;
+ /* Before working hard, check whether the instruction is available. */
+ if (optab_handler (builtin_optab, mode)->insn_code == CODE_FOR_nothing)
+ return NULL_RTX;
- /* Make a place to write the result of the instruction. */
- result = target;
- if (! (result != 0
- && GET_CODE (result) == REG
- && GET_MODE (result) == insn_mode
- && REGNO (result) >= FIRST_PSEUDO_REGISTER))
- result = gen_reg_rtx (insn_mode);
+ target = gen_reg_rtx (mode);
- /* Make a place to hold the source address. We will not expand
- the actual source until we are sure that the expansion will
- not fail -- there are trees that cannot be expanded twice. */
- src_reg = gen_reg_rtx (Pmode);
+ if (! flag_errno_math || ! HONOR_NANS (mode))
+ errno_set = false;
- /* Mark the beginning of the strlen sequence so we can emit the
- source operand later. */
- before_strlen = get_last_insn();
+ /* Always stabilize the argument list. */
+ CALL_EXPR_ARG (exp, 0) = arg0 = builtin_save_expr (arg0);
+ CALL_EXPR_ARG (exp, 1) = arg1 = builtin_save_expr (arg1);
- char_rtx = const0_rtx;
- char_mode = insn_data[(int) icode].operand[2].mode;
- if (! (*insn_data[(int) icode].operand[2].predicate) (char_rtx,
- char_mode))
- char_rtx = copy_to_mode_reg (char_mode, char_rtx);
+ op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
+ op1 = expand_normal (arg1);
- pat = GEN_FCN (icode) (result, gen_rtx_MEM (BLKmode, src_reg),
- char_rtx, GEN_INT (align));
- if (! pat)
- return 0;
- emit_insn (pat);
+ start_sequence ();
- /* Now that we are assured of success, expand the source. */
- start_sequence ();
- pat = memory_address (BLKmode,
- expand_expr (src, src_reg, ptr_mode, EXPAND_SUM));
- if (pat != src_reg)
- emit_move_insn (src_reg, pat);
- pat = gen_sequence ();
+ /* Compute into TARGET.
+ Set TARGET to wherever the result comes back. */
+ target = expand_binop (mode, builtin_optab, op0, op1,
+ target, 0, OPTAB_DIRECT);
+
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns) and call to the library function
+ with the stabilized argument list. */
+ if (target == 0)
+ {
end_sequence ();
+ return expand_call (exp, target, target == const0_rtx);
+ }
- if (before_strlen)
- emit_insn_after (pat, before_strlen);
- else
- emit_insn_before (pat, get_insns ());
+ if (errno_set)
+ expand_errno_check (exp, target);
- /* Return the value in the proper mode for this function. */
- if (GET_MODE (result) == value_mode)
- target = result;
- else if (target != 0)
- convert_move (target, result, 0);
- else
- target = convert_to_mode (value_mode, result, 0);
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
- return target;
- }
+ return target;
}
-/* Expand a call to the strstr builtin. Return 0 if we failed the
- caller should emit a normal call, otherwise try to get the result
- in TARGET, if convenient (and in mode MODE if that's convenient). */
+/* Expand a call to the builtin sin and cos math functions.
+ Return NULL_RTX if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's
+ operands. */
static rtx
-expand_builtin_strstr (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_mathfn_3 (tree exp, rtx target, rtx subtarget)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ optab builtin_optab;
+ rtx op0, insns;
+ tree fndecl = get_callee_fndecl (exp);
+ enum machine_mode mode;
+ tree arg;
+
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+
+ switch (DECL_FUNCTION_CODE (fndecl))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
- const char *p1, *p2;
+ CASE_FLT_FN (BUILT_IN_SIN):
+ CASE_FLT_FN (BUILT_IN_COS):
+ builtin_optab = sincos_optab; break;
+ default:
+ gcc_unreachable ();
+ }
- p2 = c_getstr (s2);
- if (p2 == NULL)
- return 0;
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- const char *r = strstr (p1, p2);
+ /* Check if sincos insn is available, otherwise fallback
+ to sin or cos insn. */
+ if (optab_handler (builtin_optab, mode)->insn_code == CODE_FOR_nothing)
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_SIN):
+ builtin_optab = sin_optab; break;
+ CASE_FLT_FN (BUILT_IN_COS):
+ builtin_optab = cos_optab; break;
+ default:
+ gcc_unreachable ();
+ }
- if (r == NULL)
- return const0_rtx;
+ /* Before working hard, check whether the instruction is available. */
+ if (optab_handler (builtin_optab, mode)->insn_code != CODE_FOR_nothing)
+ {
+ target = gen_reg_rtx (mode);
- /* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, ssize_int (r - p1))),
- target, mode, EXPAND_NORMAL);
- }
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- if (p2[0] == '\0')
- return expand_expr (s1, target, mode, EXPAND_NORMAL);
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
- if (p2[1] != '\0')
- return 0;
+ start_sequence ();
- fn = built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
+ /* Compute into TARGET.
+ Set TARGET to wherever the result comes back. */
+ if (builtin_optab == sincos_optab)
+ {
+ int result;
- /* New argument list transforming strstr(s1, s2) to
- strchr(s1, s2[0]). */
- arglist =
- build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
- arglist = tree_cons (NULL_TREE, s1, arglist);
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_SIN):
+ result = expand_twoval_unop (builtin_optab, op0, 0, target, 0);
+ break;
+ CASE_FLT_FN (BUILT_IN_COS):
+ result = expand_twoval_unop (builtin_optab, op0, target, 0, 0);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+ gcc_assert (result);
+ }
+ else
+ {
+ target = expand_unop (mode, builtin_optab, op0, target, 0);
+ }
+
+ if (target != 0)
+ {
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+ return target;
+ }
+
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns) and call to the library function
+ with the stabilized argument list. */
+ end_sequence ();
}
+
+ target = expand_call (exp, target, target == const0_rtx);
+
+ return target;
}
-/* Expand a call to the strchr builtin. Return 0 if we failed the
- caller should emit a normal call, otherwise try to get the result
- in TARGET, if convenient (and in mode MODE if that's convenient). */
+/* Expand a call to one of the builtin math functions that operate on
+ floating point argument and output an integer result (ilogb, isinf,
+ isnan, etc).
+ Return 0 if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's operands. */
static rtx
-expand_builtin_strchr (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_interclass_mathfn (tree exp, rtx target, rtx subtarget)
{
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ optab builtin_optab = 0;
+ enum insn_code icode = CODE_FOR_nothing;
+ rtx op0;
+ tree fndecl = get_callee_fndecl (exp);
+ enum machine_mode mode;
+ bool errno_set = false;
+ tree arg;
+
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+
+ switch (DECL_FUNCTION_CODE (fndecl))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1;
+ CASE_FLT_FN (BUILT_IN_ILOGB):
+ errno_set = true; builtin_optab = ilogb_optab; break;
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ builtin_optab = isinf_optab; break;
+ case BUILT_IN_ISNORMAL:
+ case BUILT_IN_ISFINITE:
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ /* These builtins have no optabs (yet). */
+ break;
+ default:
+ gcc_unreachable ();
+ }
- if (TREE_CODE (s2) != INTEGER_CST)
- return 0;
+ /* There's no easy way to detect the case we need to set EDOM. */
+ if (flag_errno_math && errno_set)
+ return NULL_RTX;
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- char c;
- const char *r;
+ /* Optab mode depends on the mode of the input argument. */
+ mode = TYPE_MODE (TREE_TYPE (arg));
- if (target_char_cast (s2, &c))
- return 0;
+ if (builtin_optab)
+ icode = optab_handler (builtin_optab, mode)->insn_code;
+
+ /* Before working hard, check whether the instruction is available. */
+ if (icode != CODE_FOR_nothing)
+ {
+ /* Make a suitable register to place result in. */
+ if (!target
+ || GET_MODE (target) != TYPE_MODE (TREE_TYPE (exp)))
+ target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
- r = strchr (p1, c);
+ gcc_assert (insn_data[icode].operand[0].predicate
+ (target, GET_MODE (target)));
- if (r == NULL)
- return const0_rtx;
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- /* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, ssize_int (r - p1))),
- target, mode, EXPAND_NORMAL);
- }
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+
+ if (mode != GET_MODE (op0))
+ op0 = convert_to_mode (mode, op0, 0);
- /* FIXME: Should use here strchrM optab so that ports can optimize
- this. */
- return 0;
+ /* Compute into TARGET.
+ Set TARGET to wherever the result comes back. */
+ emit_unop_insn (icode, target, op0, UNKNOWN);
+ return target;
+ }
+
+ /* If there is no optab, try generic code. */
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ tree result;
+
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ {
+ /* isinf(x) -> isgreater(fabs(x),DBL_MAX). */
+ tree const isgr_fn = built_in_decls[BUILT_IN_ISGREATER];
+ tree const type = TREE_TYPE (arg);
+ REAL_VALUE_TYPE r;
+ char buf[128];
+
+ get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&r, buf);
+ result = build_call_expr (isgr_fn, 2,
+ fold_build1 (ABS_EXPR, type, arg),
+ build_real (type, r));
+ return expand_expr (result, target, VOIDmode, EXPAND_NORMAL);
+ }
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ case BUILT_IN_ISFINITE:
+ {
+ /* isfinite(x) -> islessequal(fabs(x),DBL_MAX). */
+ tree const isle_fn = built_in_decls[BUILT_IN_ISLESSEQUAL];
+ tree const type = TREE_TYPE (arg);
+ REAL_VALUE_TYPE r;
+ char buf[128];
+
+ get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&r, buf);
+ result = build_call_expr (isle_fn, 2,
+ fold_build1 (ABS_EXPR, type, arg),
+ build_real (type, r));
+ return expand_expr (result, target, VOIDmode, EXPAND_NORMAL);
+ }
+ case BUILT_IN_ISNORMAL:
+ {
+ /* isnormal(x) -> isgreaterequal(fabs(x),DBL_MIN) &
+ islessequal(fabs(x),DBL_MAX). */
+ tree const isle_fn = built_in_decls[BUILT_IN_ISLESSEQUAL];
+ tree const isge_fn = built_in_decls[BUILT_IN_ISGREATEREQUAL];
+ tree const type = TREE_TYPE (arg);
+ REAL_VALUE_TYPE rmax, rmin;
+ char buf[128];
+
+ get_max_float (REAL_MODE_FORMAT (mode), buf, sizeof (buf));
+ real_from_string (&rmax, buf);
+ sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1);
+ real_from_string (&rmin, buf);
+ arg = builtin_save_expr (fold_build1 (ABS_EXPR, type, arg));
+ result = build_call_expr (isle_fn, 2, arg,
+ build_real (type, rmax));
+ result = fold_build2 (BIT_AND_EXPR, integer_type_node, result,
+ build_call_expr (isge_fn, 2, arg,
+ build_real (type, rmin)));
+ return expand_expr (result, target, VOIDmode, EXPAND_NORMAL);
+ }
+ default:
+ break;
}
+
+ target = expand_call (exp, target, target == const0_rtx);
+
+ return target;
}
-/* Expand a call to the strrchr builtin. Return 0 if we failed the
- caller should emit a normal call, otherwise try to get the result
- in TARGET, if convenient (and in mode MODE if that's convenient). */
+/* Expand a call to the builtin sincos math function.
+ Return NULL_RTX if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function. */
static rtx
-expand_builtin_strrchr (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_sincos (tree exp)
{
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
- {
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
- const char *p1;
+ rtx op0, op1, op2, target1, target2;
+ enum machine_mode mode;
+ tree arg, sinp, cosp;
+ int result;
- if (TREE_CODE (s2) != INTEGER_CST)
- return 0;
+ if (!validate_arglist (exp, REAL_TYPE,
+ POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- char c;
- const char *r;
+ arg = CALL_EXPR_ARG (exp, 0);
+ sinp = CALL_EXPR_ARG (exp, 1);
+ cosp = CALL_EXPR_ARG (exp, 2);
- if (target_char_cast (s2, &c))
- return 0;
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (arg));
- r = strrchr (p1, c);
+ /* Check if sincos insn is available, otherwise emit the call. */
+ if (optab_handler (sincos_optab, mode)->insn_code == CODE_FOR_nothing)
+ return NULL_RTX;
- if (r == NULL)
- return const0_rtx;
+ target1 = gen_reg_rtx (mode);
+ target2 = gen_reg_rtx (mode);
- /* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, ssize_int (r - p1))),
- target, mode, EXPAND_NORMAL);
- }
+ op0 = expand_normal (arg);
+ op1 = expand_normal (build_fold_indirect_ref (sinp));
+ op2 = expand_normal (build_fold_indirect_ref (cosp));
- if (! integer_zerop (s2))
- return 0;
+ /* Compute into target1 and target2.
+ Set TARGET to wherever the result comes back. */
+ result = expand_twoval_unop (sincos_optab, op0, target2, target1, 0);
+ gcc_assert (result);
- fn = built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
+ /* Move target1 and target2 to the memory locations indicated
+ by op1 and op2. */
+ emit_move_insn (op1, target1);
+ emit_move_insn (op2, target2);
- /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
- }
+ return const0_rtx;
}
-/* Expand a call to the strpbrk builtin. Return 0 if we failed the
- caller should emit a normal call, otherwise try to get the result
- in TARGET, if convenient (and in mode MODE if that's convenient). */
+/* Expand a call to the internal cexpi builtin to the sincos math function.
+ EXP is the expression that is a call to the builtin function; if convenient,
+ the result should be placed in TARGET. SUBTARGET may be used as the target
+ for computing one of EXP's operands. */
static rtx
-expand_builtin_strpbrk (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_cexpi (tree exp, rtx target, rtx subtarget)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
- {
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- tree fn;
- const char *p1, *p2;
+ tree fndecl = get_callee_fndecl (exp);
+ tree arg, type;
+ enum machine_mode mode;
+ rtx op0, op1, op2;
- p2 = c_getstr (s2);
- if (p2 == NULL)
- return 0;
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
- p1 = c_getstr (s1);
- if (p1 != NULL)
- {
- const char *r = strpbrk (p1, p2);
+ arg = CALL_EXPR_ARG (exp, 0);
+ type = TREE_TYPE (arg);
+ mode = TYPE_MODE (TREE_TYPE (arg));
- if (r == NULL)
- return const0_rtx;
+ /* Try expanding via a sincos optab, fall back to emitting a libcall
+ to sincos or cexp. We are sure we have sincos or cexp because cexpi
+ is only generated from sincos, cexp or if we have either of them. */
+ if (optab_handler (sincos_optab, mode)->insn_code != CODE_FOR_nothing)
+ {
+ op1 = gen_reg_rtx (mode);
+ op2 = gen_reg_rtx (mode);
- /* Return an offset into the constant string argument. */
- return expand_expr (fold (build (PLUS_EXPR, TREE_TYPE (s1),
- s1, ssize_int (r - p1))),
- target, mode, EXPAND_NORMAL);
- }
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
- if (p2[0] == '\0')
+ /* Compute into op1 and op2. */
+ expand_twoval_unop (sincos_optab, op0, op2, op1, 0);
+ }
+ else if (TARGET_HAS_SINCOS)
+ {
+ tree call, fn = NULL_TREE;
+ tree top1, top2;
+ rtx op1a, op2a;
+
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
+ fn = built_in_decls[BUILT_IN_SINCOSF];
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
+ fn = built_in_decls[BUILT_IN_SINCOS];
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
+ fn = built_in_decls[BUILT_IN_SINCOSL];
+ else
+ gcc_unreachable ();
+
+ op1 = assign_temp (TREE_TYPE (arg), 0, 1, 1);
+ op2 = assign_temp (TREE_TYPE (arg), 0, 1, 1);
+ op1a = copy_to_mode_reg (Pmode, XEXP (op1, 0));
+ op2a = copy_to_mode_reg (Pmode, XEXP (op2, 0));
+ top1 = make_tree (build_pointer_type (TREE_TYPE (arg)), op1a);
+ top2 = make_tree (build_pointer_type (TREE_TYPE (arg)), op2a);
+
+ /* Make sure not to fold the sincos call again. */
+ call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
+ expand_normal (build_call_nary (TREE_TYPE (TREE_TYPE (fn)),
+ call, 3, arg, top1, top2));
+ }
+ else
+ {
+ tree call, fn = NULL_TREE, narg;
+ tree ctype = build_complex_type (type);
+
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
+ fn = built_in_decls[BUILT_IN_CEXPF];
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
+ fn = built_in_decls[BUILT_IN_CEXP];
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
+ fn = built_in_decls[BUILT_IN_CEXPL];
+ else
+ gcc_unreachable ();
+
+ /* If we don't have a decl for cexp create one. This is the
+ friendliest fallback if the user calls __builtin_cexpi
+ without full target C99 function support. */
+ if (fn == NULL_TREE)
{
- /* strpbrk(x, "") == NULL.
- Evaluate and ignore the arguments in case they had
- side-effects. */
- expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
+ tree fntype;
+ const char *name = NULL;
+
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIF)
+ name = "cexpf";
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPI)
+ name = "cexp";
+ else if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_CEXPIL)
+ name = "cexpl";
+
+ fntype = build_function_type_list (ctype, ctype, NULL_TREE);
+ fn = build_fn_decl (name, fntype);
}
- if (p2[1] != '\0')
- return 0; /* Really call strpbrk. */
-
- fn = built_in_decls[BUILT_IN_STRCHR];
- if (!fn)
- return 0;
+ narg = fold_build2 (COMPLEX_EXPR, ctype,
+ build_real (type, dconst0), arg);
- /* New argument list transforming strpbrk(s1, s2) to
- strchr(s1, s2[0]). */
- arglist =
- build_tree_list (NULL_TREE, build_int_2 (p2[0], 0));
- arglist = tree_cons (NULL_TREE, s1, arglist);
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ /* Make sure not to fold the cexp call again. */
+ call = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
+ return expand_expr (build_call_nary (ctype, call, 1, narg),
+ target, VOIDmode, EXPAND_NORMAL);
}
+
+ /* Now build the proper return type. */
+ return expand_expr (build2 (COMPLEX_EXPR, build_complex_type (type),
+ make_tree (TREE_TYPE (arg), op2),
+ make_tree (TREE_TYPE (arg), op1)),
+ target, VOIDmode, EXPAND_NORMAL);
}
-/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
- bytes from constant string DATA + OFFSET and return it as target
- constant. */
+/* Expand a call to one of the builtin rounding functions gcc defines
+ as an extension (lfloor and lceil). As these are gcc extensions we
+ do not need to worry about setting errno to EDOM.
+ If expanding via optab fails, lower expression to (int)(floor(x)).
+ EXP is the expression that is a call to the builtin function;
+ if convenient, the result should be placed in TARGET. */
static rtx
-builtin_memcpy_read_str (data, offset, mode)
- PTR data;
- HOST_WIDE_INT offset;
- enum machine_mode mode;
+expand_builtin_int_roundingfn (tree exp, rtx target)
{
- const char *str = (const char *) data;
-
- if (offset < 0
- || ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
- > strlen (str) + 1))
- abort (); /* Attempt to read past the end of constant string. */
+ convert_optab builtin_optab;
+ rtx op0, insns, tmp;
+ tree fndecl = get_callee_fndecl (exp);
+ enum built_in_function fallback_fn;
+ tree fallback_fndecl;
+ enum machine_mode mode;
+ tree arg;
- return c_readstr (str + offset, mode);
-}
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ gcc_unreachable ();
-/* Expand a call to the memcpy builtin, with arguments in ARGLIST.
- Return 0 if we failed, the caller should emit a normal call, otherwise
- try to get the result in TARGET, if convenient (and in mode MODE if
- that's convenient). */
+ arg = CALL_EXPR_ARG (exp, 0);
-static rtx
-expand_builtin_memcpy (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
-{
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ switch (DECL_FUNCTION_CODE (fndecl))
{
- tree dest = TREE_VALUE (arglist);
- tree src = TREE_VALUE (TREE_CHAIN (arglist));
- tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- const char *src_str;
+ CASE_FLT_FN (BUILT_IN_LCEIL):
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ builtin_optab = lceil_optab;
+ fallback_fn = BUILT_IN_CEIL;
+ break;
- unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
- unsigned int dest_align
- = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
- rtx dest_mem, src_mem, dest_addr, len_rtx;
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ builtin_optab = lfloor_optab;
+ fallback_fn = BUILT_IN_FLOOR;
+ break;
- /* If DEST is not a pointer type, call the normal function. */
- if (dest_align == 0)
- return 0;
+ default:
+ gcc_unreachable ();
+ }
- /* If the LEN parameter is zero, return DEST. */
- if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0)
- {
- /* Evaluate and ignore SRC in case it has side-effects. */
- expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return expand_expr (dest, target, mode, EXPAND_NORMAL);
- }
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
- /* If either SRC is not a pointer type, don't do this
- operation in-line. */
- if (src_align == 0)
- return 0;
+ target = gen_reg_rtx (mode);
- dest_mem = get_memory_rtx (dest);
- set_mem_align (dest_mem, dest_align);
- len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
- src_str = c_getstr (src);
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- /* If SRC is a string constant and block move would be done
- by pieces, we can avoid loading the string from memory
- and only stored the computed constants. */
- if (src_str
- && GET_CODE (len_rtx) == CONST_INT
- && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
- && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
- (PTR) src_str, dest_align))
- {
- store_by_pieces (dest_mem, INTVAL (len_rtx),
- builtin_memcpy_read_str,
- (PTR) src_str, dest_align);
- return force_operand (XEXP (dest_mem, 0), NULL_RTX);
- }
+ op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
- src_mem = get_memory_rtx (src);
- set_mem_align (src_mem, src_align);
+ start_sequence ();
- /* Copy word part most expediently. */
- dest_addr = emit_block_move (dest_mem, src_mem, len_rtx);
+ /* Compute into TARGET. */
+ if (expand_sfix_optab (target, op0, builtin_optab))
+ {
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+ return target;
+ }
- if (dest_addr == 0)
- dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns). */
+ end_sequence ();
- return dest_addr;
- }
-}
+ /* Fall back to floating point rounding optab. */
+ fallback_fndecl = mathfn_built_in (TREE_TYPE (arg), fallback_fn);
-/* Expand expression EXP, which is a call to the strcpy builtin. Return 0
- if we failed the caller should emit a normal call, otherwise try to get
- the result in TARGET, if convenient (and in mode MODE if that's
- convenient). */
+ /* For non-C99 targets we may end up without a fallback fndecl here
+ if the user called __builtin_lfloor directly. In this case emit
+ a call to the floor/ceil variants nevertheless. This should result
+ in the best user experience for not full C99 targets. */
+ if (fallback_fndecl == NULL_TREE)
+ {
+ tree fntype;
+ const char *name = NULL;
-static rtx
-expand_builtin_strcpy (exp, target, mode)
- tree exp;
- rtx target;
- enum machine_mode mode;
-{
- tree arglist = TREE_OPERAND (exp, 1);
- tree fn, len;
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_LCEIL:
+ case BUILT_IN_LLCEIL:
+ name = "ceil";
+ break;
+ case BUILT_IN_LCEILF:
+ case BUILT_IN_LLCEILF:
+ name = "ceilf";
+ break;
+ case BUILT_IN_LCEILL:
+ case BUILT_IN_LLCEILL:
+ name = "ceill";
+ break;
+ case BUILT_IN_LFLOOR:
+ case BUILT_IN_LLFLOOR:
+ name = "floor";
+ break;
+ case BUILT_IN_LFLOORF:
+ case BUILT_IN_LLFLOORF:
+ name = "floorf";
+ break;
+ case BUILT_IN_LFLOORL:
+ case BUILT_IN_LLFLOORL:
+ name = "floorl";
+ break;
+ default:
+ gcc_unreachable ();
+ }
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
+ fntype = build_function_type_list (TREE_TYPE (arg),
+ TREE_TYPE (arg), NULL_TREE);
+ fallback_fndecl = build_fn_decl (name, fntype);
+ }
- fn = built_in_decls[BUILT_IN_MEMCPY];
- if (!fn)
- return 0;
+ exp = build_call_expr (fallback_fndecl, 1, arg);
- len = c_strlen (TREE_VALUE (TREE_CHAIN (arglist)));
- if (len == 0)
- return 0;
+ tmp = expand_normal (exp);
- len = size_binop (PLUS_EXPR, len, ssize_int (1));
- chainon (arglist, build_tree_list (NULL_TREE, len));
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ /* Truncate the result of floating point optab to integer
+ via expand_fix (). */
+ target = gen_reg_rtx (mode);
+ expand_fix (target, tmp, 0);
+
+ return target;
}
-/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
- bytes from constant string DATA + OFFSET and return it as target
- constant. */
+/* Expand a call to one of the builtin math functions doing integer
+ conversion (lrint).
+ Return 0 if a normal call should be emitted rather than expanding the
+ function in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET. */
static rtx
-builtin_strncpy_read_str (data, offset, mode)
- PTR data;
- HOST_WIDE_INT offset;
- enum machine_mode mode;
+expand_builtin_int_roundingfn_2 (tree exp, rtx target)
{
- const char *str = (const char *) data;
-
- if ((unsigned HOST_WIDE_INT) offset > strlen (str))
- return const0_rtx;
+ convert_optab builtin_optab;
+ rtx op0, insns;
+ tree fndecl = get_callee_fndecl (exp);
+ tree arg;
+ enum machine_mode mode;
- return c_readstr (str + offset, mode);
-}
+ /* There's no easy way to detect the case we need to set EDOM. */
+ if (flag_errno_math)
+ return NULL_RTX;
-/* Expand expression EXP, which is a call to the strncpy builtin. Return 0
- if we failed the caller should emit a normal call. */
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ gcc_unreachable ();
+
+ arg = CALL_EXPR_ARG (exp, 0);
-static rtx
-expand_builtin_strncpy (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
-{
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ switch (DECL_FUNCTION_CODE (fndecl))
{
- tree slen = c_strlen (TREE_VALUE (TREE_CHAIN (arglist)));
- tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- tree fn;
+ CASE_FLT_FN (BUILT_IN_LRINT):
+ CASE_FLT_FN (BUILT_IN_LLRINT):
+ builtin_optab = lrint_optab; break;
+ CASE_FLT_FN (BUILT_IN_LROUND):
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ builtin_optab = lround_optab; break;
+ default:
+ gcc_unreachable ();
+ }
- /* We must be passed a constant len parameter. */
- if (TREE_CODE (len) != INTEGER_CST)
- return 0;
+ /* Make a suitable register to place result in. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
- /* If the len parameter is zero, return the dst parameter. */
- if (integer_zerop (len))
- {
- /* Evaluate and ignore the src argument in case it has
- side-effects. */
- expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx,
- VOIDmode, EXPAND_NORMAL);
- /* Return the dst parameter. */
- return expand_expr (TREE_VALUE (arglist), target, mode,
- EXPAND_NORMAL);
- }
+ target = gen_reg_rtx (mode);
- /* Now, we must be passed a constant src ptr parameter. */
- if (slen == 0 || TREE_CODE (slen) != INTEGER_CST)
- return 0;
+ /* Wrap the computation of the argument in a SAVE_EXPR, as we may
+ need to expand the argument again. This way, we will not perform
+ side-effects more the once. */
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
- slen = size_binop (PLUS_EXPR, slen, ssize_int (1));
+ op0 = expand_expr (arg, NULL, VOIDmode, EXPAND_NORMAL);
- /* We're required to pad with trailing zeros if the requested
- len is greater than strlen(s2)+1. In that case try to
- use store_by_pieces, if it fails, punt. */
- if (tree_int_cst_lt (slen, len))
- {
- tree dest = TREE_VALUE (arglist);
- unsigned int dest_align
- = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
- const char *p = c_getstr (TREE_VALUE (TREE_CHAIN (arglist)));
- rtx dest_mem;
+ start_sequence ();
- if (!p || dest_align == 0 || !host_integerp (len, 1)
- || !can_store_by_pieces (tree_low_cst (len, 1),
- builtin_strncpy_read_str,
- (PTR) p, dest_align))
- return 0;
+ if (expand_sfix_optab (target, op0, builtin_optab))
+ {
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+ return target;
+ }
- dest_mem = get_memory_rtx (dest);
- store_by_pieces (dest_mem, tree_low_cst (len, 1),
- builtin_strncpy_read_str,
- (PTR) p, dest_align);
- return force_operand (XEXP (dest_mem, 0), NULL_RTX);
- }
+ /* If we were unable to expand via the builtin, stop the sequence
+ (without outputting the insns) and call to the library function
+ with the stabilized argument list. */
+ end_sequence ();
- /* OK transform into builtin memcpy. */
- fn = built_in_decls[BUILT_IN_MEMCPY];
- if (!fn)
- return 0;
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
- }
+ target = expand_call (exp, target, target == const0_rtx);
+
+ return target;
}
-/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
- bytes from constant string DATA + OFFSET and return it as target
- constant. */
+/* To evaluate powi(x,n), the floating point value x raised to the
+ constant integer exponent n, we use a hybrid algorithm that
+ combines the "window method" with look-up tables. For an
+ introduction to exponentiation algorithms and "addition chains",
+ see section 4.6.3, "Evaluation of Powers" of Donald E. Knuth,
+ "Seminumerical Algorithms", Vol. 2, "The Art of Computer Programming",
+ 3rd Edition, 1998, and Daniel M. Gordon, "A Survey of Fast Exponentiation
+ Methods", Journal of Algorithms, Vol. 27, pp. 129-146, 1998. */
+
+/* Provide a default value for POWI_MAX_MULTS, the maximum number of
+ multiplications to inline before calling the system library's pow
+ function. powi(x,n) requires at worst 2*bits(n)-2 multiplications,
+ so this default never requires calling pow, powf or powl. */
+
+#ifndef POWI_MAX_MULTS
+#define POWI_MAX_MULTS (2*HOST_BITS_PER_WIDE_INT-2)
+#endif
-static rtx
-builtin_memset_read_str (data, offset, mode)
- PTR data;
- HOST_WIDE_INT offset ATTRIBUTE_UNUSED;
- enum machine_mode mode;
-{
- const char *c = (const char *) data;
- char *p = alloca (GET_MODE_SIZE (mode));
+/* The size of the "optimal power tree" lookup table. All
+ exponents less than this value are simply looked up in the
+ powi_table below. This threshold is also used to size the
+ cache of pseudo registers that hold intermediate results. */
+#define POWI_TABLE_SIZE 256
+
+/* The size, in bits of the window, used in the "window method"
+ exponentiation algorithm. This is equivalent to a radix of
+ (1<<POWI_WINDOW_SIZE) in the corresponding "m-ary method". */
+#define POWI_WINDOW_SIZE 3
+
+/* The following table is an efficient representation of an
+ "optimal power tree". For each value, i, the corresponding
+ value, j, in the table states than an optimal evaluation
+ sequence for calculating pow(x,i) can be found by evaluating
+ pow(x,j)*pow(x,i-j). An optimal power tree for the first
+ 100 integers is given in Knuth's "Seminumerical algorithms". */
+
+static const unsigned char powi_table[POWI_TABLE_SIZE] =
+ {
+ 0, 1, 1, 2, 2, 3, 3, 4, /* 0 - 7 */
+ 4, 6, 5, 6, 6, 10, 7, 9, /* 8 - 15 */
+ 8, 16, 9, 16, 10, 12, 11, 13, /* 16 - 23 */
+ 12, 17, 13, 18, 14, 24, 15, 26, /* 24 - 31 */
+ 16, 17, 17, 19, 18, 33, 19, 26, /* 32 - 39 */
+ 20, 25, 21, 40, 22, 27, 23, 44, /* 40 - 47 */
+ 24, 32, 25, 34, 26, 29, 27, 44, /* 48 - 55 */
+ 28, 31, 29, 34, 30, 60, 31, 36, /* 56 - 63 */
+ 32, 64, 33, 34, 34, 46, 35, 37, /* 64 - 71 */
+ 36, 65, 37, 50, 38, 48, 39, 69, /* 72 - 79 */
+ 40, 49, 41, 43, 42, 51, 43, 58, /* 80 - 87 */
+ 44, 64, 45, 47, 46, 59, 47, 76, /* 88 - 95 */
+ 48, 65, 49, 66, 50, 67, 51, 66, /* 96 - 103 */
+ 52, 70, 53, 74, 54, 104, 55, 74, /* 104 - 111 */
+ 56, 64, 57, 69, 58, 78, 59, 68, /* 112 - 119 */
+ 60, 61, 61, 80, 62, 75, 63, 68, /* 120 - 127 */
+ 64, 65, 65, 128, 66, 129, 67, 90, /* 128 - 135 */
+ 68, 73, 69, 131, 70, 94, 71, 88, /* 136 - 143 */
+ 72, 128, 73, 98, 74, 132, 75, 121, /* 144 - 151 */
+ 76, 102, 77, 124, 78, 132, 79, 106, /* 152 - 159 */
+ 80, 97, 81, 160, 82, 99, 83, 134, /* 160 - 167 */
+ 84, 86, 85, 95, 86, 160, 87, 100, /* 168 - 175 */
+ 88, 113, 89, 98, 90, 107, 91, 122, /* 176 - 183 */
+ 92, 111, 93, 102, 94, 126, 95, 150, /* 184 - 191 */
+ 96, 128, 97, 130, 98, 133, 99, 195, /* 192 - 199 */
+ 100, 128, 101, 123, 102, 164, 103, 138, /* 200 - 207 */
+ 104, 145, 105, 146, 106, 109, 107, 149, /* 208 - 215 */
+ 108, 200, 109, 146, 110, 170, 111, 157, /* 216 - 223 */
+ 112, 128, 113, 130, 114, 182, 115, 132, /* 224 - 231 */
+ 116, 200, 117, 132, 118, 158, 119, 206, /* 232 - 239 */
+ 120, 240, 121, 162, 122, 147, 123, 152, /* 240 - 247 */
+ 124, 166, 125, 214, 126, 138, 127, 153, /* 248 - 255 */
+ };
+
+
+/* Return the number of multiplications required to calculate
+ powi(x,n) where n is less than POWI_TABLE_SIZE. This is a
+ subroutine of powi_cost. CACHE is an array indicating
+ which exponents have already been calculated. */
- memset (p, *c, GET_MODE_SIZE (mode));
+static int
+powi_lookup_cost (unsigned HOST_WIDE_INT n, bool *cache)
+{
+ /* If we've already calculated this exponent, then this evaluation
+ doesn't require any additional multiplications. */
+ if (cache[n])
+ return 0;
- return c_readstr (p, mode);
+ cache[n] = true;
+ return powi_lookup_cost (n - powi_table[n], cache)
+ + powi_lookup_cost (powi_table[n], cache) + 1;
}
-/* Expand expression EXP, which is a call to the memset builtin. Return 0
- if we failed the caller should emit a normal call, otherwise try to get
- the result in TARGET, if convenient (and in mode MODE if that's
- convenient). */
+/* Return the number of multiplications required to calculate
+ powi(x,n) for an arbitrary x, given the exponent N. This
+ function needs to be kept in sync with expand_powi below. */
-static rtx
-expand_builtin_memset (exp, target, mode)
- tree exp;
- rtx target;
- enum machine_mode mode;
+static int
+powi_cost (HOST_WIDE_INT n)
{
- tree arglist = TREE_OPERAND (exp, 1);
+ bool cache[POWI_TABLE_SIZE];
+ unsigned HOST_WIDE_INT digit;
+ unsigned HOST_WIDE_INT val;
+ int result;
- if (!validate_arglist (arglist,
- POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ if (n == 0)
return 0;
- else
- {
- tree dest = TREE_VALUE (arglist);
- tree val = TREE_VALUE (TREE_CHAIN (arglist));
- tree len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- char c;
-
- unsigned int dest_align
- = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
- rtx dest_mem, dest_addr, len_rtx;
-
- /* If DEST is not a pointer type, don't do this
- operation in-line. */
- if (dest_align == 0)
- return 0;
- /* If the LEN parameter is zero, return DEST. */
- if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0)
- {
- /* Evaluate and ignore VAL in case it has side-effects. */
- expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return expand_expr (dest, target, mode, EXPAND_NORMAL);
- }
+ /* Ignore the reciprocal when calculating the cost. */
+ val = (n < 0) ? -n : n;
- if (TREE_CODE (val) != INTEGER_CST)
- return 0;
+ /* Initialize the exponent cache. */
+ memset (cache, 0, POWI_TABLE_SIZE * sizeof (bool));
+ cache[1] = true;
- if (target_char_cast (val, &c))
- return 0;
+ result = 0;
- if (c)
+ while (val >= POWI_TABLE_SIZE)
+ {
+ if (val & 1)
{
- if (!host_integerp (len, 1))
- return 0;
- if (!can_store_by_pieces (tree_low_cst (len, 1),
- builtin_memset_read_str, (PTR) &c,
- dest_align))
- return 0;
-
- dest_mem = get_memory_rtx (dest);
- store_by_pieces (dest_mem, tree_low_cst (len, 1),
- builtin_memset_read_str,
- (PTR) &c, dest_align);
- return force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ digit = val & ((1 << POWI_WINDOW_SIZE) - 1);
+ result += powi_lookup_cost (digit, cache)
+ + POWI_WINDOW_SIZE + 1;
+ val >>= POWI_WINDOW_SIZE;
+ }
+ else
+ {
+ val >>= 1;
+ result++;
}
+ }
- len_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
+ return result + powi_lookup_cost (val, cache);
+}
- dest_mem = get_memory_rtx (dest);
- set_mem_align (dest_mem, dest_align);
- dest_addr = clear_storage (dest_mem, len_rtx);
+/* Recursive subroutine of expand_powi. This function takes the array,
+ CACHE, of already calculated exponents and an exponent N and returns
+ an RTX that corresponds to CACHE[1]**N, as calculated in mode MODE. */
- if (dest_addr == 0)
- dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+static rtx
+expand_powi_1 (enum machine_mode mode, unsigned HOST_WIDE_INT n, rtx *cache)
+{
+ unsigned HOST_WIDE_INT digit;
+ rtx target, result;
+ rtx op0, op1;
- return dest_addr;
+ if (n < POWI_TABLE_SIZE)
+ {
+ if (cache[n])
+ return cache[n];
+
+ target = gen_reg_rtx (mode);
+ cache[n] = target;
+
+ op0 = expand_powi_1 (mode, n - powi_table[n], cache);
+ op1 = expand_powi_1 (mode, powi_table[n], cache);
+ }
+ else if (n & 1)
+ {
+ target = gen_reg_rtx (mode);
+ digit = n & ((1 << POWI_WINDOW_SIZE) - 1);
+ op0 = expand_powi_1 (mode, n - digit, cache);
+ op1 = expand_powi_1 (mode, digit, cache);
+ }
+ else
+ {
+ target = gen_reg_rtx (mode);
+ op0 = expand_powi_1 (mode, n >> 1, cache);
+ op1 = op0;
}
+
+ result = expand_mult (mode, op0, op1, target, 0);
+ if (result != target)
+ emit_move_insn (target, result);
+ return target;
}
-/* Expand expression EXP, which is a call to the bzero builtin. Return 0
- if we failed the caller should emit a normal call. */
+/* Expand the RTL to evaluate powi(x,n) in mode MODE. X is the
+ floating point operand in mode MODE, and N is the exponent. This
+ function needs to be kept in sync with powi_cost above. */
static rtx
-expand_builtin_bzero (exp)
- tree exp;
+expand_powi (rtx x, enum machine_mode mode, HOST_WIDE_INT n)
{
- tree arglist = TREE_OPERAND (exp, 1);
- tree dest, size, newarglist;
+ unsigned HOST_WIDE_INT val;
+ rtx cache[POWI_TABLE_SIZE];
rtx result;
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return NULL_RTX;
-
- dest = TREE_VALUE (arglist);
- size = TREE_VALUE (TREE_CHAIN (arglist));
+ if (n == 0)
+ return CONST1_RTX (mode);
- /* New argument list transforming bzero(ptr x, int y) to
- memset(ptr x, int 0, size_t y). This is done this way
- so that if it isn't expanded inline, we fallback to
- calling bzero instead of memset. */
+ val = (n < 0) ? -n : n;
- newarglist = build_tree_list (NULL_TREE, convert (sizetype, size));
- newarglist = tree_cons (NULL_TREE, integer_zero_node, newarglist);
- newarglist = tree_cons (NULL_TREE, dest, newarglist);
+ memset (cache, 0, sizeof (cache));
+ cache[1] = x;
- TREE_OPERAND (exp, 1) = newarglist;
- result = expand_builtin_memset (exp, const0_rtx, VOIDmode);
+ result = expand_powi_1 (mode, (n < 0) ? -n : n, cache);
- /* Always restore the original arguments. */
- TREE_OPERAND (exp, 1) = arglist;
+ /* If the original exponent was negative, reciprocate the result. */
+ if (n < 0)
+ result = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
+ result, NULL_RTX, 0, OPTAB_LIB_WIDEN);
return result;
}
-/* Expand expression EXP, which is a call to the memcmp or the strcmp builtin.
- ARGLIST is the argument list for this call. Return 0 if we failed and the
- caller should emit a normal call, otherwise try to get the result in
- TARGET, if convenient (and in mode MODE, if that's convenient). */
+/* Expand a call to the pow built-in mathematical function. Return NULL_RTX if
+ a normal call should be emitted rather than expanding the function
+ in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET. */
static rtx
-expand_builtin_memcmp (exp, arglist, target, mode)
- tree exp ATTRIBUTE_UNUSED;
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_pow (tree exp, rtx target, rtx subtarget)
{
- tree arg1, arg2, len;
- const char *p1, *p2;
-
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
-
- arg1 = TREE_VALUE (arglist);
- arg2 = TREE_VALUE (TREE_CHAIN (arglist));
- len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
+ tree arg0, arg1;
+ tree fn, narg0;
+ tree type = TREE_TYPE (exp);
+ REAL_VALUE_TYPE cint, c, c2;
+ HOST_WIDE_INT n;
+ rtx op, op2;
+ enum machine_mode mode = TYPE_MODE (type);
+
+ if (! validate_arglist (exp, REAL_TYPE, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
- /* If the len parameter is zero, return zero. */
- if (host_integerp (len, 1) && tree_low_cst (len, 1) == 0)
+ arg0 = CALL_EXPR_ARG (exp, 0);
+ arg1 = CALL_EXPR_ARG (exp, 1);
+
+ if (TREE_CODE (arg1) != REAL_CST
+ || TREE_OVERFLOW (arg1))
+ return expand_builtin_mathfn_2 (exp, target, subtarget);
+
+ /* Handle constant exponents. */
+
+ /* For integer valued exponents we can expand to an optimal multiplication
+ sequence using expand_powi. */
+ c = TREE_REAL_CST (arg1);
+ n = real_to_integer (&c);
+ real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
+ if (real_identical (&c, &cint)
+ && ((n >= -1 && n <= 2)
+ || (flag_unsafe_math_optimizations
+ && optimize_insn_for_speed_p ()
+ && powi_cost (n) <= POWI_MAX_MULTS)))
{
- /* Evaluate and ignore arg1 and arg2 in case they have
- side-effects. */
- expand_expr (arg1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (arg2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
+ op = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
+ if (n != 1)
+ {
+ op = force_reg (mode, op);
+ op = expand_powi (op, mode, n);
+ }
+ return op;
}
- p1 = c_getstr (arg1);
- p2 = c_getstr (arg2);
+ narg0 = builtin_save_expr (arg0);
- /* If all arguments are constant, and the value of len is not greater
- than the lengths of arg1 and arg2, evaluate at compile-time. */
- if (host_integerp (len, 1) && p1 && p2
- && compare_tree_int (len, strlen (p1) + 1) <= 0
- && compare_tree_int (len, strlen (p2) + 1) <= 0)
+ /* If the exponent is not integer valued, check if it is half of an integer.
+ In this case we can expand to sqrt (x) * x**(n/2). */
+ fn = mathfn_built_in (type, BUILT_IN_SQRT);
+ if (fn != NULL_TREE)
{
- const int r = memcmp (p1, p2, tree_low_cst (len, 1));
-
- return (r < 0 ? constm1_rtx : (r > 0 ? const1_rtx : const0_rtx));
+ real_arithmetic (&c2, MULT_EXPR, &c, &dconst2);
+ n = real_to_integer (&c2);
+ real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
+ if (real_identical (&c2, &cint)
+ && ((flag_unsafe_math_optimizations
+ && optimize_insn_for_speed_p ()
+ && powi_cost (n/2) <= POWI_MAX_MULTS)
+ || n == 1))
+ {
+ tree call_expr = build_call_expr (fn, 1, narg0);
+ /* Use expand_expr in case the newly built call expression
+ was folded to a non-call. */
+ op = expand_expr (call_expr, subtarget, mode, EXPAND_NORMAL);
+ if (n != 1)
+ {
+ op2 = expand_expr (narg0, subtarget, VOIDmode, EXPAND_NORMAL);
+ op2 = force_reg (mode, op2);
+ op2 = expand_powi (op2, mode, abs (n / 2));
+ op = expand_simple_binop (mode, MULT, op, op2, NULL_RTX,
+ 0, OPTAB_LIB_WIDEN);
+ /* If the original exponent was negative, reciprocate the
+ result. */
+ if (n < 0)
+ op = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
+ op, NULL_RTX, 0, OPTAB_LIB_WIDEN);
+ }
+ return op;
+ }
}
- /* If len parameter is one, return an expression corresponding to
- (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
- if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1)
+ /* Try if the exponent is a third of an integer. In this case
+ we can expand to x**(n/3) * cbrt(x)**(n%3). As cbrt (x) is
+ different from pow (x, 1./3.) due to rounding and behavior
+ with negative x we need to constrain this transformation to
+ unsafe math and positive x or finite math. */
+ fn = mathfn_built_in (type, BUILT_IN_CBRT);
+ if (fn != NULL_TREE
+ && flag_unsafe_math_optimizations
+ && (tree_expr_nonnegative_p (arg0)
+ || !HONOR_NANS (mode)))
{
- tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
- tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
- tree ind1 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
- tree ind2 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
- return expand_expr (result, target, mode, EXPAND_NORMAL);
- }
-
-#ifdef HAVE_cmpstrsi
- {
- rtx arg1_rtx, arg2_rtx, arg3_rtx;
- rtx result;
- rtx insn;
-
- int arg1_align
- = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
- int arg2_align
- = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
- enum machine_mode insn_mode
- = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode;
-
- /* If we don't have POINTER_TYPE, call the function. */
- if (arg1_align == 0 || arg2_align == 0)
- return 0;
-
- /* Make a place to write the result of the instruction. */
- result = target;
- if (! (result != 0
- && GET_CODE (result) == REG && GET_MODE (result) == insn_mode
- && REGNO (result) >= FIRST_PSEUDO_REGISTER))
- result = gen_reg_rtx (insn_mode);
-
- arg1_rtx = get_memory_rtx (arg1);
- arg2_rtx = get_memory_rtx (arg2);
- arg3_rtx = expand_expr (len, NULL_RTX, VOIDmode, 0);
- if (!HAVE_cmpstrsi)
- insn = NULL_RTX;
- else
- insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
- GEN_INT (MIN (arg1_align, arg2_align)));
-
- if (insn)
- emit_insn (insn);
- else
- emit_library_call_value (memcmp_libfunc, result, LCT_PURE_MAKE_BLOCK,
- TYPE_MODE (integer_type_node), 3,
- XEXP (arg1_rtx, 0), Pmode,
- XEXP (arg2_rtx, 0), Pmode,
- convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
- TREE_UNSIGNED (sizetype)),
- TYPE_MODE (sizetype));
-
- /* Return the value in the proper mode for this function. */
- mode = TYPE_MODE (TREE_TYPE (exp));
- if (GET_MODE (result) == mode)
- return result;
- else if (target != 0)
- {
- convert_move (target, result, 0);
- return target;
- }
- else
- return convert_to_mode (mode, result, 0);
- }
-#endif
+ REAL_VALUE_TYPE dconst3;
+ real_from_integer (&dconst3, VOIDmode, 3, 0, 0);
+ real_arithmetic (&c2, MULT_EXPR, &c, &dconst3);
+ real_round (&c2, mode, &c2);
+ n = real_to_integer (&c2);
+ real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
+ real_arithmetic (&c2, RDIV_EXPR, &cint, &dconst3);
+ real_convert (&c2, mode, &c2);
+ if (real_identical (&c2, &c)
+ && ((optimize_insn_for_speed_p ()
+ && powi_cost (n/3) <= POWI_MAX_MULTS)
+ || n == 1))
+ {
+ tree call_expr = build_call_expr (fn, 1,narg0);
+ op = expand_builtin (call_expr, NULL_RTX, subtarget, mode, 0);
+ if (abs (n) % 3 == 2)
+ op = expand_simple_binop (mode, MULT, op, op, op,
+ 0, OPTAB_LIB_WIDEN);
+ if (n != 1)
+ {
+ op2 = expand_expr (narg0, subtarget, VOIDmode, EXPAND_NORMAL);
+ op2 = force_reg (mode, op2);
+ op2 = expand_powi (op2, mode, abs (n / 3));
+ op = expand_simple_binop (mode, MULT, op, op2, NULL_RTX,
+ 0, OPTAB_LIB_WIDEN);
+ /* If the original exponent was negative, reciprocate the
+ result. */
+ if (n < 0)
+ op = expand_binop (mode, sdiv_optab, CONST1_RTX (mode),
+ op, NULL_RTX, 0, OPTAB_LIB_WIDEN);
+ }
+ return op;
+ }
+ }
- return 0;
+ /* Fall back to optab expansion. */
+ return expand_builtin_mathfn_2 (exp, target, subtarget);
}
-/* Expand expression EXP, which is a call to the strcmp builtin. Return 0
- if we failed the caller should emit a normal call, otherwise try to get
- the result in TARGET, if convenient. */
+/* Expand a call to the powi built-in mathematical function. Return NULL_RTX if
+ a normal call should be emitted rather than expanding the function
+ in-line. EXP is the expression that is a call to the builtin
+ function; if convenient, the result should be placed in TARGET. */
static rtx
-expand_builtin_strcmp (exp, target, mode)
- tree exp;
- rtx target;
- enum machine_mode mode;
+expand_builtin_powi (tree exp, rtx target, rtx subtarget)
{
- tree arglist = TREE_OPERAND (exp, 1);
- tree arg1, arg2, len, len2, fn;
- const char *p1, *p2;
-
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
+ tree arg0, arg1;
+ rtx op0, op1;
+ enum machine_mode mode;
+ enum machine_mode mode2;
- arg1 = TREE_VALUE (arglist);
- arg2 = TREE_VALUE (TREE_CHAIN (arglist));
+ if (! validate_arglist (exp, REAL_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
- p1 = c_getstr (arg1);
- p2 = c_getstr (arg2);
+ arg0 = CALL_EXPR_ARG (exp, 0);
+ arg1 = CALL_EXPR_ARG (exp, 1);
+ mode = TYPE_MODE (TREE_TYPE (exp));
- if (p1 && p2)
- {
- const int i = strcmp (p1, p2);
- return (i < 0 ? constm1_rtx : (i > 0 ? const1_rtx : const0_rtx));
- }
+ /* Handle constant power. */
- /* If either arg is "", return an expression corresponding to
- (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
- if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
+ if (TREE_CODE (arg1) == INTEGER_CST
+ && !TREE_OVERFLOW (arg1))
{
- tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
- tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
- tree ind1 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
- tree ind2 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
- return expand_expr (result, target, mode, EXPAND_NORMAL);
+ HOST_WIDE_INT n = TREE_INT_CST_LOW (arg1);
+
+ /* If the exponent is -1, 0, 1 or 2, then expand_powi is exact.
+ Otherwise, check the number of multiplications required. */
+ if ((TREE_INT_CST_HIGH (arg1) == 0
+ || TREE_INT_CST_HIGH (arg1) == -1)
+ && ((n >= -1 && n <= 2)
+ || (optimize_insn_for_speed_p ()
+ && powi_cost (n) <= POWI_MAX_MULTS)))
+ {
+ op0 = expand_expr (arg0, subtarget, VOIDmode, EXPAND_NORMAL);
+ op0 = force_reg (mode, op0);
+ return expand_powi (op0, mode, n);
+ }
}
- len = c_strlen (arg1);
- len2 = c_strlen (arg2);
-
- if (len)
- len = size_binop (PLUS_EXPR, ssize_int (1), len);
-
- if (len2)
- len2 = size_binop (PLUS_EXPR, ssize_int (1), len2);
-
- /* If we don't have a constant length for the first, use the length
- of the second, if we know it. We don't require a constant for
- this case; some cost analysis could be done if both are available
- but neither is constant. For now, assume they're equally cheap
- unless one has side effects.
+ /* Emit a libcall to libgcc. */
- If both strings have constant lengths, use the smaller. This
- could arise if optimization results in strcpy being called with
- two fixed strings, or if the code was machine-generated. We should
- add some code to the `memcmp' handler below to deal with such
- situations, someday. */
+ /* Mode of the 2nd argument must match that of an int. */
+ mode2 = mode_for_size (INT_TYPE_SIZE, MODE_INT, 0);
- if (!len || TREE_CODE (len) != INTEGER_CST)
- {
- if (len2 && !TREE_SIDE_EFFECTS (len2))
- len = len2;
- else if (len == 0)
- return 0;
- }
- else if (len2 && TREE_CODE (len2) == INTEGER_CST
- && tree_int_cst_lt (len2, len))
- len = len2;
+ if (target == NULL_RTX)
+ target = gen_reg_rtx (mode);
- /* If both arguments have side effects, we cannot optimize. */
- if (TREE_SIDE_EFFECTS (len))
- return 0;
+ op0 = expand_expr (arg0, subtarget, mode, EXPAND_NORMAL);
+ if (GET_MODE (op0) != mode)
+ op0 = convert_to_mode (mode, op0, 0);
+ op1 = expand_expr (arg1, NULL_RTX, mode2, EXPAND_NORMAL);
+ if (GET_MODE (op1) != mode2)
+ op1 = convert_to_mode (mode2, op1, 0);
- fn = built_in_decls[BUILT_IN_MEMCMP];
- if (!fn)
- return 0;
+ target = emit_library_call_value (optab_libfunc (powi_optab, mode),
+ target, LCT_CONST, mode, 2,
+ op0, mode, op1, mode2);
- chainon (arglist, build_tree_list (NULL_TREE, len));
- return expand_expr (build_function_call_expr (fn, arglist),
- target, mode, EXPAND_NORMAL);
+ return target;
}
-/* Expand expression EXP, which is a call to the strncmp builtin. Return 0
- if we failed the caller should emit a normal call, otherwise try to get
- the result in TARGET, if convenient. */
+/* Expand expression EXP which is a call to the strlen builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call, otherwise
+ try to get the result in TARGET, if convenient. */
static rtx
-expand_builtin_strncmp (exp, target, mode)
- tree exp;
- rtx target;
- enum machine_mode mode;
-{
- tree arglist = TREE_OPERAND (exp, 1);
- tree fn, newarglist, len = 0;
- tree arg1, arg2, arg3;
- const char *p1, *p2;
+expand_builtin_strlen (tree exp, rtx target,
+ enum machine_mode target_mode)
+{
+ if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ rtx pat;
+ tree len;
+ tree src = CALL_EXPR_ARG (exp, 0);
+ rtx result, src_reg, char_rtx, before_strlen;
+ enum machine_mode insn_mode = target_mode, char_mode;
+ enum insn_code icode = CODE_FOR_nothing;
+ int align;
+
+ /* If the length can be computed at compile-time, return it. */
+ len = c_strlen (src, 0);
+ if (len)
+ return expand_expr (len, target, target_mode, EXPAND_NORMAL);
+
+ /* If the length can be computed at compile-time and is constant
+ integer, but there are side-effects in src, evaluate
+ src for side-effects, then return len.
+ E.g. x = strlen (i++ ? "xfoo" + 1 : "bar");
+ can be optimized into: i++; x = 3; */
+ len = c_strlen (src, 1);
+ if (len && TREE_CODE (len) == INTEGER_CST)
+ {
+ expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return expand_expr (len, target, target_mode, EXPAND_NORMAL);
+ }
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
+ align = get_pointer_alignment (src, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
- arg1 = TREE_VALUE (arglist);
- arg2 = TREE_VALUE (TREE_CHAIN (arglist));
- arg3 = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
+ /* If SRC is not a pointer type, don't do this operation inline. */
+ if (align == 0)
+ return NULL_RTX;
- /* If the len parameter is zero, return zero. */
- if (host_integerp (arg3, 1) && tree_low_cst (arg3, 1) == 0)
- {
- /* Evaluate and ignore arg1 and arg2 in case they have
- side-effects. */
- expand_expr (arg1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (arg2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
+ /* Bail out if we can't compute strlen in the right mode. */
+ while (insn_mode != VOIDmode)
+ {
+ icode = optab_handler (strlen_optab, insn_mode)->insn_code;
+ if (icode != CODE_FOR_nothing)
+ break;
- p1 = c_getstr (arg1);
- p2 = c_getstr (arg2);
+ insn_mode = GET_MODE_WIDER_MODE (insn_mode);
+ }
+ if (insn_mode == VOIDmode)
+ return NULL_RTX;
- /* If all arguments are constant, evaluate at compile-time. */
- if (host_integerp (arg3, 1) && p1 && p2)
- {
- const int r = strncmp (p1, p2, tree_low_cst (arg3, 1));
- return (r < 0 ? constm1_rtx : (r > 0 ? const1_rtx : const0_rtx));
- }
+ /* Make a place to write the result of the instruction. */
+ result = target;
+ if (! (result != 0
+ && REG_P (result)
+ && GET_MODE (result) == insn_mode
+ && REGNO (result) >= FIRST_PSEUDO_REGISTER))
+ result = gen_reg_rtx (insn_mode);
- /* If len == 1 or (either string parameter is "" and (len >= 1)),
- return (*(const u_char*)arg1 - *(const u_char*)arg2). */
- if (host_integerp (arg3, 1)
- && (tree_low_cst (arg3, 1) == 1
- || (tree_low_cst (arg3, 1) > 1
- && ((p1 && *p1 == '\0') || (p2 && *p2 == '\0')))))
- {
- tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
- tree cst_uchar_ptr_node = build_pointer_type (cst_uchar_node);
- tree ind1 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg1))));
- tree ind2 =
- fold (build1 (CONVERT_EXPR, integer_type_node,
- build1 (INDIRECT_REF, cst_uchar_node,
- build1 (NOP_EXPR, cst_uchar_ptr_node, arg2))));
- tree result = fold (build (MINUS_EXPR, integer_type_node, ind1, ind2));
- return expand_expr (result, target, mode, EXPAND_NORMAL);
- }
+ /* Make a place to hold the source address. We will not expand
+ the actual source until we are sure that the expansion will
+ not fail -- there are trees that cannot be expanded twice. */
+ src_reg = gen_reg_rtx (Pmode);
- /* If c_strlen can determine an expression for one of the string
- lengths, and it doesn't have side effects, then call
- expand_builtin_memcmp() using length MIN(strlen(string)+1, arg3). */
-
- /* Perhaps one of the strings is really constant, if so prefer
- that constant length over the other string's length. */
- if (p1)
- len = c_strlen (arg1);
- else if (p2)
- len = c_strlen (arg2);
-
- /* If we still don't have a len, try either string arg as long
- as they don't have side effects. */
- if (!len && !TREE_SIDE_EFFECTS (arg1))
- len = c_strlen (arg1);
- if (!len && !TREE_SIDE_EFFECTS (arg2))
- len = c_strlen (arg2);
- /* If we still don't have a length, punt. */
- if (!len)
- return 0;
+ /* Mark the beginning of the strlen sequence so we can emit the
+ source operand later. */
+ before_strlen = get_last_insn ();
- fn = built_in_decls[BUILT_IN_MEMCMP];
- if (!fn)
- return 0;
+ char_rtx = const0_rtx;
+ char_mode = insn_data[(int) icode].operand[2].mode;
+ if (! (*insn_data[(int) icode].operand[2].predicate) (char_rtx,
+ char_mode))
+ char_rtx = copy_to_mode_reg (char_mode, char_rtx);
+
+ pat = GEN_FCN (icode) (result, gen_rtx_MEM (BLKmode, src_reg),
+ char_rtx, GEN_INT (align));
+ if (! pat)
+ return NULL_RTX;
+ emit_insn (pat);
+
+ /* Now that we are assured of success, expand the source. */
+ start_sequence ();
+ pat = expand_expr (src, src_reg, ptr_mode, EXPAND_NORMAL);
+ if (pat != src_reg)
+ emit_move_insn (src_reg, pat);
+ pat = get_insns ();
+ end_sequence ();
- /* Add one to the string length. */
- len = fold (size_binop (PLUS_EXPR, len, ssize_int (1)));
+ if (before_strlen)
+ emit_insn_after (pat, before_strlen);
+ else
+ emit_insn_before (pat, get_insns ());
- /* The actual new length parameter is MIN(len,arg3). */
- len = fold (build (MIN_EXPR, TREE_TYPE (len), len, arg3));
+ /* Return the value in the proper mode for this function. */
+ if (GET_MODE (result) == target_mode)
+ target = result;
+ else if (target != 0)
+ convert_move (target, result, 0);
+ else
+ target = convert_to_mode (target_mode, result, 0);
- newarglist = build_tree_list (NULL_TREE, len);
- newarglist = tree_cons (NULL_TREE, arg2, newarglist);
- newarglist = tree_cons (NULL_TREE, arg1, newarglist);
- return expand_expr (build_function_call_expr (fn, newarglist),
- target, mode, EXPAND_NORMAL);
+ return target;
+ }
}
-/* Expand expression EXP, which is a call to the strcat builtin.
- Return 0 if we failed the caller should emit a normal call,
- otherwise try to get the result in TARGET, if convenient. */
+/* Expand a call to the strstr builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
static rtx
-expand_builtin_strcat (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_strstr (tree exp, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree dst = TREE_VALUE (arglist),
- src = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p = c_getstr (src);
-
- /* If the string length is zero, return the dst parameter. */
- if (p && *p == '\0')
- return expand_expr (dst, target, mode, EXPAND_NORMAL);
-
- return 0;
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_strstr (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return NULL_RTX;
}
-/* Expand expression EXP, which is a call to the strncat builtin.
- Return 0 if we failed the caller should emit a normal call,
- otherwise try to get the result in TARGET, if convenient. */
+/* Expand a call to the strchr builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
static rtx
-expand_builtin_strncat (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_strchr (tree exp, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist,
- POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
{
- tree dst = TREE_VALUE (arglist),
- src = TREE_VALUE (TREE_CHAIN (arglist)),
- len = TREE_VALUE (TREE_CHAIN (TREE_CHAIN (arglist)));
- const char *p = c_getstr (src);
-
- /* If the requested length is zero, or the src parameter string
- length is zero, return the dst parameter. */
- if (integer_zerop (len) || (p && *p == '\0'))
- {
- /* Evaluate and ignore the src and len parameters in case
- they have side-effects. */
- expand_expr (src, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return expand_expr (dst, target, mode, EXPAND_NORMAL);
- }
-
- /* If the requested len is greater than or equal to the string
- length, call strcat. */
- if (TREE_CODE (len) == INTEGER_CST && p
- && compare_tree_int (len, strlen (p)) >= 0)
- {
- tree newarglist
- = tree_cons (NULL_TREE, dst, build_tree_list (NULL_TREE, src));
- tree fn = built_in_decls[BUILT_IN_STRCAT];
-
- /* If the replacement _DECL isn't initialized, don't do the
- transformation. */
- if (!fn)
- return 0;
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_strchr (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
- return expand_expr (build_function_call_expr (fn, newarglist),
- target, mode, EXPAND_NORMAL);
- }
- return 0;
+ /* FIXME: Should use strchrM optab so that ports can optimize this. */
}
+ return NULL_RTX;
}
-/* Expand expression EXP, which is a call to the strspn builtin.
- Return 0 if we failed the caller should emit a normal call,
- otherwise try to get the result in TARGET, if convenient. */
+/* Expand a call to the strrchr builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
static rtx
-expand_builtin_strspn (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_strrchr (tree exp, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
-
- /* If both arguments are constants, evaluate at compile-time. */
- if (p1 && p2)
- {
- const size_t r = strspn (p1, p2);
- return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
- }
-
- /* If either argument is "", return 0. */
- if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
- {
- /* Evaluate and ignore both arguments in case either one has
- side-effects. */
- expand_expr (s1, const0_rtx, VOIDmode, EXPAND_NORMAL);
- expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
- return 0;
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_strrchr (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+ return NULL_RTX;
}
-/* Expand expression EXP, which is a call to the strcspn builtin.
- Return 0 if we failed the caller should emit a normal call,
- otherwise try to get the result in TARGET, if convenient. */
+/* Expand a call to the strpbrk builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
static rtx
-expand_builtin_strcspn (arglist, target, mode)
- tree arglist;
- rtx target;
- enum machine_mode mode;
+expand_builtin_strpbrk (tree exp, rtx target, enum machine_mode mode)
{
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
- else
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
{
- tree s1 = TREE_VALUE (arglist), s2 = TREE_VALUE (TREE_CHAIN (arglist));
- const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
-
- /* If both arguments are constants, evaluate at compile-time. */
- if (p1 && p2)
- {
- const size_t r = strcspn (p1, p2);
- return expand_expr (size_int (r), target, mode, EXPAND_NORMAL);
- }
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_strpbrk (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
- /* If the first argument is "", return 0. */
- if (p1 && *p1 == '\0')
- {
- /* Evaluate and ignore argument s2 in case it has
- side-effects. */
- expand_expr (s2, const0_rtx, VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
+/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
+ bytes from constant string DATA + OFFSET and return it as target
+ constant. */
- /* If the second argument is "", return __builtin_strlen(s1). */
- if (p2 && *p2 == '\0')
- {
- tree newarglist = build_tree_list (NULL_TREE, s1),
- fn = built_in_decls[BUILT_IN_STRLEN];
+static rtx
+builtin_memcpy_read_str (void *data, HOST_WIDE_INT offset,
+ enum machine_mode mode)
+{
+ const char *str = (const char *) data;
- /* If the replacement _DECL isn't initialized, don't do the
- transformation. */
- if (!fn)
- return 0;
+ gcc_assert (offset >= 0
+ && ((unsigned HOST_WIDE_INT) offset + GET_MODE_SIZE (mode)
+ <= strlen (str) + 1));
- return expand_expr (build_function_call_expr (fn, newarglist),
- target, mode, EXPAND_NORMAL);
- }
- return 0;
- }
+ return c_readstr (str + offset, mode);
}
-/* Expand a call to __builtin_saveregs, generating the result in TARGET,
- if that's convenient. */
+/* Expand a call EXP to the memcpy builtin.
+ Return NULL_RTX if we failed, the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient (and in
+ mode MODE if that's convenient). */
-rtx
-expand_builtin_saveregs ()
+static rtx
+expand_builtin_memcpy (tree exp, rtx target, enum machine_mode mode)
{
- rtx val, seq;
-
- /* Don't do __builtin_saveregs more than once in a function.
- Save the result of the first call and reuse it. */
- if (saveregs_value != 0)
- return saveregs_value;
-
- /* When this function is called, it means that registers must be
- saved on entry to this function. So we migrate the call to the
- first insn of this function. */
-
- start_sequence ();
-
-#ifdef EXPAND_BUILTIN_SAVEREGS
- /* Do whatever the machine needs done in this case. */
- val = EXPAND_BUILTIN_SAVEREGS ();
-#else
- /* ??? We used to try and build up a call to the out of line function,
- guessing about what registers needed saving etc. This became much
- harder with __builtin_va_start, since we don't have a tree for a
- call to __builtin_saveregs to fall back on. There was exactly one
- port (i860) that used this code, and I'm unconvinced it could actually
- handle the general case. So we no longer try to handle anything
- weird and make the backend absorb the evil. */
-
- error ("__builtin_saveregs not supported by this target");
- val = const0_rtx;
-#endif
-
- seq = get_insns ();
- end_sequence ();
+ tree fndecl = get_callee_fndecl (exp);
- saveregs_value = val;
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+ const char *src_str;
+ unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
+ unsigned int dest_align
+ = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+ rtx dest_mem, src_mem, dest_addr, len_rtx;
+ tree result = fold_builtin_memory_op (dest, src, len,
+ TREE_TYPE (TREE_TYPE (fndecl)),
+ false, /*endp=*/0);
+ HOST_WIDE_INT expected_size = -1;
+ unsigned int expected_align = 0;
+ tree_ann_common_t ann;
+
+ if (result)
+ {
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
- /* Put the sequence after the NOTE that starts the function. If this
- is inside a SEQUENCE, make the outer-level insn chain current, so
- the code is placed at the start of the function. */
- push_topmost_sequence ();
- emit_insns_after (seq, get_insns ());
- pop_topmost_sequence ();
+ /* If DEST is not a pointer type, call the normal function. */
+ if (dest_align == 0)
+ return NULL_RTX;
- return val;
-}
+ /* If either SRC is not a pointer type, don't do this
+ operation in-line. */
+ if (src_align == 0)
+ return NULL_RTX;
+
+ ann = tree_common_ann (exp);
+ if (ann)
+ stringop_block_profile (ann->stmt, &expected_align, &expected_size);
+
+ if (expected_align < dest_align)
+ expected_align = dest_align;
+ dest_mem = get_memory_rtx (dest, len);
+ set_mem_align (dest_mem, dest_align);
+ len_rtx = expand_normal (len);
+ src_str = c_getstr (src);
-/* __builtin_args_info (N) returns word N of the arg space info
- for the current function. The number and meanings of words
- is controlled by the definition of CUMULATIVE_ARGS. */
+ /* If SRC is a string constant and block move would be done
+ by pieces, we can avoid loading the string from memory
+ and only stored the computed constants. */
+ if (src_str
+ && GET_CODE (len_rtx) == CONST_INT
+ && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
+ && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
+ CONST_CAST (char *, src_str),
+ dest_align, false))
+ {
+ dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
+ builtin_memcpy_read_str,
+ CONST_CAST (char *, src_str),
+ dest_align, false, 0);
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
+ }
-static rtx
-expand_builtin_args_info (exp)
- tree exp;
-{
- tree arglist = TREE_OPERAND (exp, 1);
- int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int);
- int *word_ptr = (int *) ¤t_function_args_info;
-#if 0
- /* These are used by the code below that is if 0'ed away */
- int i;
- tree type, elts, result;
-#endif
+ src_mem = get_memory_rtx (src, len);
+ set_mem_align (src_mem, src_align);
- if (sizeof (CUMULATIVE_ARGS) % sizeof (int) != 0)
- abort ();
+ /* Copy word part most expediently. */
+ dest_addr = emit_block_move_hints (dest_mem, src_mem, len_rtx,
+ CALL_EXPR_TAILCALL (exp)
+ ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL,
+ expected_align, expected_size);
- if (arglist != 0)
- {
- if (!host_integerp (TREE_VALUE (arglist), 0))
- error ("argument of `__builtin_args_info' must be constant");
- else
+ if (dest_addr == 0)
{
- HOST_WIDE_INT wordnum = tree_low_cst (TREE_VALUE (arglist), 0);
-
- if (wordnum < 0 || wordnum >= nwords)
- error ("argument of `__builtin_args_info' out of range");
- else
- return GEN_INT (word_ptr[wordnum]);
+ dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_addr = convert_memory_address (ptr_mode, dest_addr);
}
+ return dest_addr;
}
- else
- error ("missing argument in `__builtin_args_info'");
-
- return const0_rtx;
-
-#if 0
- for (i = 0; i < nwords; i++)
- elts = tree_cons (NULL_TREE, build_int_2 (word_ptr[i], 0));
-
- type = build_array_type (integer_type_node,
- build_index_type (build_int_2 (nwords, 0)));
- result = build (CONSTRUCTOR, type, NULL_TREE, nreverse (elts));
- TREE_CONSTANT (result) = 1;
- TREE_STATIC (result) = 1;
- result = build1 (INDIRECT_REF, build_pointer_type (type), result);
- TREE_CONSTANT (result) = 1;
- return expand_expr (result, NULL_RTX, VOIDmode, 0);
-#endif
}
-/* Expand ARGLIST, from a call to __builtin_next_arg. */
+/* Expand a call EXP to the mempcpy builtin.
+ Return NULL_RTX if we failed; the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient (and in
+ mode MODE if that's convenient). If ENDP is 0 return the
+ destination pointer, if ENDP is 1 return the end pointer ala
+ mempcpy, and if ENDP is 2 return the end pointer minus one ala
+ stpcpy. */
static rtx
-expand_builtin_next_arg (arglist)
- tree arglist;
+expand_builtin_mempcpy (tree exp, rtx target, enum machine_mode mode)
{
- tree fntype = TREE_TYPE (current_function_decl);
-
- if ((TYPE_ARG_TYPES (fntype) == 0
- || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
- == void_type_node))
- && ! current_function_varargs)
- {
- error ("`va_start' used in function with fixed args");
- return const0_rtx;
- }
-
- if (arglist)
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
{
- tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
- tree arg = TREE_VALUE (arglist);
-
- /* Strip off all nops for the sake of the comparison. This
- is not quite the same as STRIP_NOPS. It does more.
- We must also strip off INDIRECT_EXPR for C++ reference
- parameters. */
- while (TREE_CODE (arg) == NOP_EXPR
- || TREE_CODE (arg) == CONVERT_EXPR
- || TREE_CODE (arg) == NON_LVALUE_EXPR
- || TREE_CODE (arg) == INDIRECT_REF)
- arg = TREE_OPERAND (arg, 0);
- if (arg != last_parm)
- warning ("second parameter of `va_start' not last named argument");
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+ return expand_builtin_mempcpy_args (dest, src, len,
+ TREE_TYPE (exp),
+ target, mode, /*endp=*/ 1);
}
- else if (! current_function_varargs)
- /* Evidently an out of date version of <stdarg.h>; can't validate
- va_start's second argument, but can still work as intended. */
- warning ("`__builtin_next_arg' called without an argument");
-
- return expand_binop (Pmode, add_optab,
- current_function_internal_arg_pointer,
- current_function_arg_offset_rtx,
- NULL_RTX, 0, OPTAB_LIB_WIDEN);
}
-/* Make it easier for the backends by protecting the valist argument
- from multiple evaluations. */
+/* Helper function to do the actual work for expand_builtin_mempcpy. The
+ arguments to the builtin_mempcpy call DEST, SRC, and LEN are broken out
+ so that this can also be called without constructing an actual CALL_EXPR.
+ TYPE is the return type of the call. The other arguments and return value
+ are the same as for expand_builtin_mempcpy. */
-static tree
-stabilize_va_list (valist, needs_lvalue)
- tree valist;
- int needs_lvalue;
+static rtx
+expand_builtin_mempcpy_args (tree dest, tree src, tree len, tree type,
+ rtx target, enum machine_mode mode, int endp)
{
- if (TREE_CODE (va_list_type_node) == ARRAY_TYPE)
+ /* If return value is ignored, transform mempcpy into memcpy. */
+ if (target == const0_rtx && implicit_built_in_decls[BUILT_IN_MEMCPY])
{
- if (TREE_SIDE_EFFECTS (valist))
- valist = save_expr (valist);
+ tree fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ tree result = build_call_expr (fn, 3, dest, src, len);
- /* For this case, the backends will be expecting a pointer to
- TREE_TYPE (va_list_type_node), but it's possible we've
- actually been given an array (an actual va_list_type_node).
- So fix it. */
- if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
+ while (TREE_CODE (result) == COMPOUND_EXPR)
{
- tree p1 = build_pointer_type (TREE_TYPE (va_list_type_node));
- tree p2 = build_pointer_type (va_list_type_node);
-
- valist = build1 (ADDR_EXPR, p2, valist);
- valist = fold (build1 (NOP_EXPR, p1, valist));
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
}
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
else
{
- tree pt;
+ const char *src_str;
+ unsigned int src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
+ unsigned int dest_align
+ = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+ rtx dest_mem, src_mem, len_rtx;
+ tree result = fold_builtin_memory_op (dest, src, len, type, false, endp);
- if (! needs_lvalue)
+ if (result)
{
- if (! TREE_SIDE_EFFECTS (valist))
- return valist;
-
- pt = build_pointer_type (va_list_type_node);
- valist = fold (build1 (ADDR_EXPR, pt, valist));
- TREE_SIDE_EFFECTS (valist) = 1;
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
- if (TREE_SIDE_EFFECTS (valist))
- valist = save_expr (valist);
- valist = fold (build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (valist)),
- valist));
- }
-
- return valist;
-}
+ /* If either SRC or DEST is not a pointer type, don't do this
+ operation in-line. */
+ if (dest_align == 0 || src_align == 0)
+ return NULL_RTX;
-/* The "standard" implementation of va_start: just assign `nextarg' to
- the variable. */
+ /* If LEN is not constant, call the normal function. */
+ if (! host_integerp (len, 1))
+ return NULL_RTX;
-void
-std_expand_builtin_va_start (stdarg_p, valist, nextarg)
- int stdarg_p;
- tree valist;
- rtx nextarg;
-{
- tree t;
+ len_rtx = expand_normal (len);
+ src_str = c_getstr (src);
- if (! stdarg_p)
- {
- /* The dummy named parameter is declared as a 'word' sized
- object, but if a 'word' is smaller than an 'int', it would
- have been promoted to int when it was added to the arglist. */
- int align = PARM_BOUNDARY / BITS_PER_UNIT;
- int size = MAX (UNITS_PER_WORD,
- GET_MODE_SIZE (TYPE_MODE (integer_type_node)));
- int offset = ((size + align - 1) / align) * align;
- nextarg = plus_constant (nextarg, -offset);
- }
+ /* If SRC is a string constant and block move would be done
+ by pieces, we can avoid loading the string from memory
+ and only stored the computed constants. */
+ if (src_str
+ && GET_CODE (len_rtx) == CONST_INT
+ && (unsigned HOST_WIDE_INT) INTVAL (len_rtx) <= strlen (src_str) + 1
+ && can_store_by_pieces (INTVAL (len_rtx), builtin_memcpy_read_str,
+ CONST_CAST (char *, src_str),
+ dest_align, false))
+ {
+ dest_mem = get_memory_rtx (dest, len);
+ set_mem_align (dest_mem, dest_align);
+ dest_mem = store_by_pieces (dest_mem, INTVAL (len_rtx),
+ builtin_memcpy_read_str,
+ CONST_CAST (char *, src_str),
+ dest_align, false, endp);
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
+ }
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- make_tree (ptr_type_node, nextarg));
- TREE_SIDE_EFFECTS (t) = 1;
+ if (GET_CODE (len_rtx) == CONST_INT
+ && can_move_by_pieces (INTVAL (len_rtx),
+ MIN (dest_align, src_align)))
+ {
+ dest_mem = get_memory_rtx (dest, len);
+ set_mem_align (dest_mem, dest_align);
+ src_mem = get_memory_rtx (src, len);
+ set_mem_align (src_mem, src_align);
+ dest_mem = move_by_pieces (dest_mem, src_mem, INTVAL (len_rtx),
+ MIN (dest_align, src_align), endp);
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
+ }
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return NULL_RTX;
+ }
}
-/* Expand ARGLIST, which from a call to __builtin_stdarg_va_start or
- __builtin_varargs_va_start, depending on STDARG_P. */
+/* Expand expression EXP, which is a call to the memmove builtin. Return
+ NULL_RTX if we failed; the caller should emit a normal call. */
static rtx
-expand_builtin_va_start (stdarg_p, arglist)
- int stdarg_p;
- tree arglist;
+expand_builtin_memmove (tree exp, rtx target, enum machine_mode mode, int ignore)
{
- rtx nextarg;
- tree chain = arglist, valist;
-
- if (stdarg_p)
- nextarg = expand_builtin_next_arg (chain = TREE_CHAIN (arglist));
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
else
- nextarg = expand_builtin_next_arg (NULL_TREE);
-
- if (TREE_CHAIN (chain))
- error ("too many arguments to function `va_start'");
-
- valist = stabilize_va_list (TREE_VALUE (arglist), 1);
-
-#ifdef EXPAND_BUILTIN_VA_START
- EXPAND_BUILTIN_VA_START (stdarg_p, valist, nextarg);
-#else
- std_expand_builtin_va_start (stdarg_p, valist, nextarg);
-#endif
-
- return const0_rtx;
+ {
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+ return expand_builtin_memmove_args (dest, src, len, TREE_TYPE (exp),
+ target, mode, ignore);
+ }
}
-/* The "standard" implementation of va_arg: read the value from the
- current (padded) address and increment by the (padded) size. */
+/* Helper function to do the actual work for expand_builtin_memmove. The
+ arguments to the builtin_memmove call DEST, SRC, and LEN are broken out
+ so that this can also be called without constructing an actual CALL_EXPR.
+ TYPE is the return type of the call. The other arguments and return value
+ are the same as for expand_builtin_memmove. */
-rtx
-std_expand_builtin_va_arg (valist, type)
- tree valist, type;
+static rtx
+expand_builtin_memmove_args (tree dest, tree src, tree len,
+ tree type, rtx target, enum machine_mode mode,
+ int ignore)
{
- tree addr_tree, t, type_size = NULL;
- tree align, alignm1;
- tree rounded_size;
- rtx addr;
-
- /* Compute the rounded size of the type. */
- align = size_int (PARM_BOUNDARY / BITS_PER_UNIT);
- alignm1 = size_int (PARM_BOUNDARY / BITS_PER_UNIT - 1);
- if (type == error_mark_node
- || (type_size = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type))) == NULL
- || TREE_OVERFLOW (type_size))
- rounded_size = size_zero_node;
- else
- rounded_size = fold (build (MULT_EXPR, sizetype,
- fold (build (TRUNC_DIV_EXPR, sizetype,
- fold (build (PLUS_EXPR, sizetype,
- type_size, alignm1)),
- align)),
- align));
+ tree result = fold_builtin_memory_op (dest, src, len, type, ignore, /*endp=*/3);
- /* Get AP. */
- addr_tree = valist;
- if (PAD_VARARGS_DOWN && ! integer_zerop (rounded_size))
+ if (result)
{
- /* Small args are padded downward. */
- addr_tree = fold (build (PLUS_EXPR, TREE_TYPE (addr_tree), addr_tree,
- fold (build (COND_EXPR, sizetype,
- fold (build (GT_EXPR, sizetype,
- rounded_size,
- align)),
- size_zero_node,
- fold (build (MINUS_EXPR, sizetype,
- rounded_size,
- type_size))))));
+ STRIP_TYPE_NOPS (result);
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
+
+ /* Otherwise, call the normal function. */
+ return NULL_RTX;
+}
- addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL);
- addr = copy_to_reg (addr);
+/* Expand expression EXP, which is a call to the bcopy builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call. */
- /* Compute new value for AP. */
- if (! integer_zerop (rounded_size))
- {
- t = build (MODIFY_EXPR, TREE_TYPE (valist), valist,
- build (PLUS_EXPR, TREE_TYPE (valist), valist,
- rounded_size));
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
- }
+static rtx
+expand_builtin_bcopy (tree exp, int ignore)
+{
+ tree type = TREE_TYPE (exp);
+ tree src, dest, size;
- return addr;
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ src = CALL_EXPR_ARG (exp, 0);
+ dest = CALL_EXPR_ARG (exp, 1);
+ size = CALL_EXPR_ARG (exp, 2);
+
+ /* Transform bcopy(ptr x, ptr y, int z) to memmove(ptr y, ptr x, size_t z).
+ This is done this way so that if it isn't expanded inline, we fall
+ back to calling bcopy instead of memmove. */
+ return expand_builtin_memmove_args (dest, src,
+ fold_convert (sizetype, size),
+ type, const0_rtx, VOIDmode,
+ ignore);
}
-/* Expand __builtin_va_arg, which is not really a builtin function, but
- a very special sort of operator. */
+#ifndef HAVE_movstr
+# define HAVE_movstr 0
+# define CODE_FOR_movstr CODE_FOR_nothing
+#endif
-rtx
-expand_builtin_va_arg (valist, type)
- tree valist, type;
+/* Expand into a movstr instruction, if one is available. Return NULL_RTX if
+ we failed, the caller should emit a normal call, otherwise try to
+ get the result in TARGET, if convenient. If ENDP is 0 return the
+ destination pointer, if ENDP is 1 return the end pointer ala
+ mempcpy, and if ENDP is 2 return the end pointer minus one ala
+ stpcpy. */
+
+static rtx
+expand_movstr (tree dest, tree src, rtx target, int endp)
{
- rtx addr, result;
- tree promoted_type, want_va_type, have_va_type;
+ rtx end;
+ rtx dest_mem;
+ rtx src_mem;
+ rtx insn;
+ const struct insn_data * data;
- /* Verify that valist is of the proper type. */
+ if (!HAVE_movstr)
+ return NULL_RTX;
- want_va_type = va_list_type_node;
- have_va_type = TREE_TYPE (valist);
- if (TREE_CODE (want_va_type) == ARRAY_TYPE)
+ dest_mem = get_memory_rtx (dest, NULL);
+ src_mem = get_memory_rtx (src, NULL);
+ if (!endp)
{
- /* If va_list is an array type, the argument may have decayed
- to a pointer type, e.g. by being passed to another function.
- In that case, unwrap both types so that we can compare the
- underlying records. */
- if (TREE_CODE (have_va_type) == ARRAY_TYPE
- || TREE_CODE (have_va_type) == POINTER_TYPE)
- {
- want_va_type = TREE_TYPE (want_va_type);
- have_va_type = TREE_TYPE (have_va_type);
- }
+ target = force_reg (Pmode, XEXP (dest_mem, 0));
+ dest_mem = replace_equiv_address (dest_mem, target);
+ end = gen_reg_rtx (Pmode);
}
- if (TYPE_MAIN_VARIANT (want_va_type) != TYPE_MAIN_VARIANT (have_va_type))
+ else
{
- error ("first argument to `va_arg' not of type `va_list'");
- addr = const0_rtx;
+ if (target == 0 || target == const0_rtx)
+ {
+ end = gen_reg_rtx (Pmode);
+ if (target == 0)
+ target = end;
+ }
+ else
+ end = target;
}
- /* Generate a diagnostic for requesting data of a type that cannot
- be passed through `...' due to type promotion at the call site. */
- else if ((promoted_type = (*lang_type_promotes_to) (type)) != NULL_TREE)
- {
- const char *name = "<anonymous type>", *pname = 0;
- static bool gave_help;
+ data = insn_data + CODE_FOR_movstr;
- if (TYPE_NAME (type))
- {
- if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
- name = IDENTIFIER_POINTER (TYPE_NAME (type));
- else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
- && DECL_NAME (TYPE_NAME (type)))
- name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
- }
- if (TYPE_NAME (promoted_type))
- {
- if (TREE_CODE (TYPE_NAME (promoted_type)) == IDENTIFIER_NODE)
- pname = IDENTIFIER_POINTER (TYPE_NAME (promoted_type));
- else if (TREE_CODE (TYPE_NAME (promoted_type)) == TYPE_DECL
- && DECL_NAME (TYPE_NAME (promoted_type)))
- pname = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (promoted_type)));
- }
+ if (data->operand[0].mode != VOIDmode)
+ end = gen_lowpart (data->operand[0].mode, end);
- /* Unfortunately, this is merely undefined, rather than a constraint
- violation, so we cannot make this an error. If this call is never
- executed, the program is still strictly conforming. */
- warning ("`%s' is promoted to `%s' when passed through `...'",
- name, pname);
- if (! gave_help)
- {
- gave_help = true;
- warning ("(so you should pass `%s' not `%s' to `va_arg')",
- pname, name);
- }
+ insn = data->genfun (end, dest_mem, src_mem);
- /* We can, however, treat "undefined" any way we please.
- Call abort to encourage the user to fix the program. */
- expand_builtin_trap ();
+ gcc_assert (insn);
- /* This is dead code, but go ahead and finish so that the
- mode of the result comes out right. */
- addr = const0_rtx;
- }
- else
- {
- /* Make it easier for the backends by protecting the valist argument
- from multiple evaluations. */
- valist = stabilize_va_list (valist, 0);
+ emit_insn (insn);
-#ifdef EXPAND_BUILTIN_VA_ARG
- addr = EXPAND_BUILTIN_VA_ARG (valist, type);
-#else
- addr = std_expand_builtin_va_arg (valist, type);
-#endif
+ /* movstr is supposed to set end to the address of the NUL
+ terminator. If the caller requested a mempcpy-like return value,
+ adjust it. */
+ if (endp == 1 && target != const0_rtx)
+ {
+ rtx tem = plus_constant (gen_lowpart (GET_MODE (target), end), 1);
+ emit_move_insn (target, force_operand (tem, NULL_RTX));
}
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (addr) != Pmode)
- addr = convert_memory_address (Pmode, addr);
-#endif
+ return target;
+}
- result = gen_rtx_MEM (TYPE_MODE (type), addr);
- set_mem_alias_set (result, get_varargs_alias_set ());
+/* Expand expression EXP, which is a call to the strcpy builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call, otherwise
+ try to get the result in TARGET, if convenient (and in mode MODE if that's
+ convenient). */
- return result;
+static rtx
+expand_builtin_strcpy (tree fndecl, tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ return expand_builtin_strcpy_args (fndecl, dest, src, target, mode);
+ }
+ return NULL_RTX;
}
-/* Expand ARGLIST, from a call to __builtin_va_end. */
+/* Helper function to do the actual work for expand_builtin_strcpy. The
+ arguments to the builtin_strcpy call DEST and SRC are broken out
+ so that this can also be called without constructing an actual CALL_EXPR.
+ The other arguments and return value are the same as for
+ expand_builtin_strcpy. */
static rtx
-expand_builtin_va_end (arglist)
- tree arglist;
+expand_builtin_strcpy_args (tree fndecl, tree dest, tree src,
+ rtx target, enum machine_mode mode)
{
- tree valist = TREE_VALUE (arglist);
-
-#ifdef EXPAND_BUILTIN_VA_END
- valist = stabilize_va_list (valist, 0);
- EXPAND_BUILTIN_VA_END(arglist);
-#else
- /* Evaluate for side effects, if needed. I hate macros that don't
- do that. */
- if (TREE_SIDE_EFFECTS (valist))
- expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL);
-#endif
+ tree result = fold_builtin_strcpy (fndecl, dest, src, 0);
+ if (result)
+ {
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return expand_movstr (dest, src, target, /*endp=*/0);
- return const0_rtx;
}
-/* Expand ARGLIST, from a call to __builtin_va_copy. We do this as a
- builtin rather than just as an assignment in stdarg.h because of the
- nastiness of array-type va_list types. */
+/* Expand a call EXP to the stpcpy builtin.
+ Return NULL_RTX if we failed the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient (and in
+ mode MODE if that's convenient). */
static rtx
-expand_builtin_va_copy (arglist)
- tree arglist;
+expand_builtin_stpcpy (tree exp, rtx target, enum machine_mode mode)
{
- tree dst, src, t;
+ tree dst, src;
- dst = TREE_VALUE (arglist);
- src = TREE_VALUE (TREE_CHAIN (arglist));
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
- dst = stabilize_va_list (dst, 1);
- src = stabilize_va_list (src, 0);
+ dst = CALL_EXPR_ARG (exp, 0);
+ src = CALL_EXPR_ARG (exp, 1);
- if (TREE_CODE (va_list_type_node) != ARRAY_TYPE)
+ /* If return value is ignored, transform stpcpy into strcpy. */
+ if (target == const0_rtx && implicit_built_in_decls[BUILT_IN_STRCPY])
{
- t = build (MODIFY_EXPR, va_list_type_node, dst, src);
- TREE_SIDE_EFFECTS (t) = 1;
- expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+ tree result = build_call_expr (fn, 2, dst, src);
+
+ STRIP_NOPS (result);
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
}
else
{
- rtx dstb, srcb, size;
+ tree len, lenp1;
+ rtx ret;
- /* Evaluate to pointers. */
- dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL);
- srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL);
- size = expand_expr (TYPE_SIZE_UNIT (va_list_type_node), NULL_RTX,
- VOIDmode, EXPAND_NORMAL);
+ /* Ensure we get an actual string whose length can be evaluated at
+ compile-time, not an expression containing a string. This is
+ because the latter will potentially produce pessimized code
+ when used to produce the return value. */
+ if (! c_getstr (src) || ! (len = c_strlen (src, 0)))
+ return expand_movstr (dst, src, target, /*endp=*/2);
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (dstb) != Pmode)
- dstb = convert_memory_address (Pmode, dstb);
+ lenp1 = size_binop (PLUS_EXPR, len, ssize_int (1));
+ ret = expand_builtin_mempcpy_args (dst, src, lenp1, TREE_TYPE (exp),
+ target, mode, /*endp=*/2);
- if (GET_MODE (srcb) != Pmode)
- srcb = convert_memory_address (Pmode, srcb);
-#endif
+ if (ret)
+ return ret;
- /* "Dereference" to BLKmode memories. */
- dstb = gen_rtx_MEM (BLKmode, dstb);
- set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst))));
- set_mem_align (dstb, TYPE_ALIGN (va_list_type_node));
- srcb = gen_rtx_MEM (BLKmode, srcb);
- set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src))));
- set_mem_align (srcb, TYPE_ALIGN (va_list_type_node));
+ if (TREE_CODE (len) == INTEGER_CST)
+ {
+ rtx len_rtx = expand_normal (len);
- /* Copy. */
- emit_block_move (dstb, srcb, size);
- }
+ if (GET_CODE (len_rtx) == CONST_INT)
+ {
+ ret = expand_builtin_strcpy_args (get_callee_fndecl (exp),
+ dst, src, target, mode);
- return const0_rtx;
+ if (ret)
+ {
+ if (! target)
+ {
+ if (mode != VOIDmode)
+ target = gen_reg_rtx (mode);
+ else
+ target = gen_reg_rtx (GET_MODE (ret));
+ }
+ if (GET_MODE (target) != GET_MODE (ret))
+ ret = gen_lowpart (GET_MODE (target), ret);
+
+ ret = plus_constant (ret, INTVAL (len_rtx));
+ ret = emit_move_insn (target, force_operand (ret, NULL_RTX));
+ gcc_assert (ret);
+
+ return target;
+ }
+ }
+ }
+
+ return expand_movstr (dst, src, target, /*endp=*/2);
+ }
}
-/* Expand a call to one of the builtin functions __builtin_frame_address or
- __builtin_return_address. */
+/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
+ bytes from constant string DATA + OFFSET and return it as target
+ constant. */
-static rtx
-expand_builtin_frame_address (exp)
- tree exp;
+rtx
+builtin_strncpy_read_str (void *data, HOST_WIDE_INT offset,
+ enum machine_mode mode)
{
- tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
- tree arglist = TREE_OPERAND (exp, 1);
+ const char *str = (const char *) data;
- /* The argument must be a nonnegative integer constant.
- It counts the number of frames to scan up the stack.
- The value is the return address saved in that frame. */
- if (arglist == 0)
- /* Warning about missing arg was already issued. */
+ if ((unsigned HOST_WIDE_INT) offset > strlen (str))
return const0_rtx;
- else if (! host_integerp (TREE_VALUE (arglist), 1))
- {
- if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
- error ("invalid arg to `__builtin_frame_address'");
- else
- error ("invalid arg to `__builtin_return_address'");
- return const0_rtx;
- }
- else
- {
- rtx tem
- = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl),
- tree_low_cst (TREE_VALUE (arglist), 1),
- hard_frame_pointer_rtx);
-
- /* Some ports cannot access arbitrary stack frames. */
- if (tem == NULL)
- {
- if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
- warning ("unsupported arg to `__builtin_frame_address'");
- else
- warning ("unsupported arg to `__builtin_return_address'");
- return const0_rtx;
- }
-
- /* For __builtin_frame_address, return what we've got. */
- if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
- return tem;
- if (GET_CODE (tem) != REG
- && ! CONSTANT_P (tem))
- tem = copy_to_mode_reg (Pmode, tem);
- return tem;
- }
+ return c_readstr (str + offset, mode);
}
-/* Expand a call to the alloca builtin, with arguments ARGLIST. Return 0 if
- we failed and the caller should emit a normal call, otherwise try to get
- the result in TARGET, if convenient. */
+/* Expand expression EXP, which is a call to the strncpy builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call. */
static rtx
-expand_builtin_alloca (arglist, target)
- tree arglist;
- rtx target;
+expand_builtin_strncpy (tree exp, rtx target, enum machine_mode mode)
{
- rtx op0;
- rtx result;
+ tree fndecl = get_callee_fndecl (exp);
- if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
- return 0;
+ if (validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ {
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+ tree slen = c_strlen (src, 1);
+ tree result = fold_builtin_strncpy (fndecl, dest, src, len, slen);
- /* Compute the argument. */
- op0 = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
+ if (result)
+ {
+ while (TREE_CODE (result) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (result, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ result = TREE_OPERAND (result, 1);
+ }
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
- /* Allocate the desired space. */
- result = allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT);
+ /* We must be passed a constant len and src parameter. */
+ if (!host_integerp (len, 1) || !slen || !host_integerp (slen, 1))
+ return NULL_RTX;
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (result) != ptr_mode)
- result = convert_memory_address (ptr_mode, result);
-#endif
+ slen = size_binop (PLUS_EXPR, slen, ssize_int (1));
- return result;
+ /* We're required to pad with trailing zeros if the requested
+ len is greater than strlen(s2)+1. In that case try to
+ use store_by_pieces, if it fails, punt. */
+ if (tree_int_cst_lt (slen, len))
+ {
+ unsigned int dest_align
+ = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+ const char *p = c_getstr (src);
+ rtx dest_mem;
+
+ if (!p || dest_align == 0 || !host_integerp (len, 1)
+ || !can_store_by_pieces (tree_low_cst (len, 1),
+ builtin_strncpy_read_str,
+ CONST_CAST (char *, p),
+ dest_align, false))
+ return NULL_RTX;
+
+ dest_mem = get_memory_rtx (dest, len);
+ store_by_pieces (dest_mem, tree_low_cst (len, 1),
+ builtin_strncpy_read_str,
+ CONST_CAST (char *, p), dest_align, false, 0);
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
+ }
+ }
+ return NULL_RTX;
}
-/* Expand a call to the ffs builtin. The arguments are in ARGLIST.
- Return 0 if a normal call should be emitted rather than expanding the
- function in-line. If convenient, the result should be placed in TARGET.
- SUBTARGET may be used as the target for computing one of EXP's operands. */
+/* Callback routine for store_by_pieces. Read GET_MODE_BITSIZE (MODE)
+ bytes from constant string DATA + OFFSET and return it as target
+ constant. */
-static rtx
-expand_builtin_ffs (arglist, target, subtarget)
- tree arglist;
- rtx target, subtarget;
+rtx
+builtin_memset_read_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
+ enum machine_mode mode)
{
- rtx op0;
- if (!validate_arglist (arglist, INTEGER_TYPE, VOID_TYPE))
- return 0;
+ const char *c = (const char *) data;
+ char *p = XALLOCAVEC (char, GET_MODE_SIZE (mode));
- /* Compute the argument. */
- op0 = expand_expr (TREE_VALUE (arglist), subtarget, VOIDmode, 0);
- /* Compute ffs, into TARGET if possible.
- Set TARGET to wherever the result comes back. */
- target = expand_unop (TYPE_MODE (TREE_TYPE (TREE_VALUE (arglist))),
- ffs_optab, op0, target, 1);
- if (target == 0)
- abort ();
- return target;
+ memset (p, *c, GET_MODE_SIZE (mode));
+
+ return c_readstr (p, mode);
}
-/* If the string passed to fputs is a constant and is one character
- long, we attempt to transform this call into __builtin_fputc(). */
+/* Callback routine for store_by_pieces. Return the RTL of a register
+ containing GET_MODE_SIZE (MODE) consecutive copies of the unsigned
+ char value given in the RTL register data. For example, if mode is
+ 4 bytes wide, return the RTL for 0x01010101*data. */
static rtx
-expand_builtin_fputs (arglist, ignore, unlocked)
- tree arglist;
- int ignore;
- int unlocked;
+builtin_memset_gen_str (void *data, HOST_WIDE_INT offset ATTRIBUTE_UNUSED,
+ enum machine_mode mode)
{
- tree len, fn;
- tree fn_fputc = unlocked ? built_in_decls[BUILT_IN_FPUTC_UNLOCKED]
- : built_in_decls[BUILT_IN_FPUTC];
- tree fn_fwrite = unlocked ? built_in_decls[BUILT_IN_FWRITE_UNLOCKED]
- : built_in_decls[BUILT_IN_FWRITE];
-
- /* If the return value is used, or the replacement _DECL isn't
- initialized, don't do the transformation. */
- if (!ignore || !fn_fputc || !fn_fwrite)
- return 0;
+ rtx target, coeff;
+ size_t size;
+ char *p;
- /* Verify the arguments in the original call. */
- if (!validate_arglist (arglist, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
- return 0;
+ size = GET_MODE_SIZE (mode);
+ if (size == 1)
+ return (rtx) data;
- /* Get the length of the string passed to fputs. If the length
- can't be determined, punt. */
- if (!(len = c_strlen (TREE_VALUE (arglist)))
- || TREE_CODE (len) != INTEGER_CST)
- return 0;
+ p = XALLOCAVEC (char, size);
+ memset (p, 1, size);
+ coeff = c_readstr (p, mode);
- switch (compare_tree_int (len, 1))
- {
- case -1: /* length is 0, delete the call entirely . */
- {
- /* Evaluate and ignore the argument in case it has
- side-effects. */
- expand_expr (TREE_VALUE (TREE_CHAIN (arglist)), const0_rtx,
- VOIDmode, EXPAND_NORMAL);
- return const0_rtx;
- }
- case 0: /* length is 1, call fputc. */
- {
- const char *p = c_getstr (TREE_VALUE (arglist));
+ target = convert_to_mode (mode, (rtx) data, 1);
+ target = expand_mult (mode, target, coeff, NULL_RTX, 1);
+ return force_reg (mode, target);
+}
- if (p != NULL)
- {
- /* New argument list transforming fputs(string, stream) to
- fputc(string[0], stream). */
- arglist =
- build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
- arglist =
- tree_cons (NULL_TREE, build_int_2 (p[0], 0), arglist);
- fn = fn_fputc;
- break;
- }
- }
- /* FALLTHROUGH */
- case 1: /* length is greater than 1, call fwrite. */
- {
- tree string_arg;
+/* Expand expression EXP, which is a call to the memset builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call, otherwise
+ try to get the result in TARGET, if convenient (and in mode MODE if that's
+ convenient). */
- /* If optimizing for size keep fputs. */
- if (optimize_size)
- return 0;
- string_arg = TREE_VALUE (arglist);
- /* New argument list transforming fputs(string, stream) to
- fwrite(string, 1, len, stream). */
- arglist = build_tree_list (NULL_TREE, TREE_VALUE (TREE_CHAIN (arglist)));
- arglist = tree_cons (NULL_TREE, len, arglist);
- arglist = tree_cons (NULL_TREE, size_one_node, arglist);
- arglist = tree_cons (NULL_TREE, string_arg, arglist);
- fn = fn_fwrite;
- break;
- }
- default:
- abort ();
+static rtx
+expand_builtin_memset (tree exp, rtx target, enum machine_mode mode)
+{
+ if (!validate_arglist (exp,
+ POINTER_TYPE, INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ tree dest = CALL_EXPR_ARG (exp, 0);
+ tree val = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+ return expand_builtin_memset_args (dest, val, len, target, mode, exp);
}
-
- return expand_expr (build_function_call_expr (fn, arglist),
- (ignore ? const0_rtx : NULL_RTX),
- VOIDmode, EXPAND_NORMAL);
}
-/* Expand a call to __builtin_expect. We return our argument and emit a
- NOTE_INSN_EXPECTED_VALUE note. This is the expansion of __builtin_expect in
- a non-jump context. */
+/* Helper function to do the actual work for expand_builtin_memset. The
+ arguments to the builtin_memset call DEST, VAL, and LEN are broken out
+ so that this can also be called without constructing an actual CALL_EXPR.
+ The other arguments and return value are the same as for
+ expand_builtin_memset. */
static rtx
-expand_builtin_expect (arglist, target)
- tree arglist;
- rtx target;
+expand_builtin_memset_args (tree dest, tree val, tree len,
+ rtx target, enum machine_mode mode, tree orig_exp)
{
- tree exp, c;
- rtx note, rtx_c;
+ tree fndecl, fn;
+ enum built_in_function fcode;
+ char c;
+ unsigned int dest_align;
+ rtx dest_mem, dest_addr, len_rtx;
+ HOST_WIDE_INT expected_size = -1;
+ unsigned int expected_align = 0;
+ tree_ann_common_t ann;
+
+ dest_align = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+
+ /* If DEST is not a pointer type, don't do this operation in-line. */
+ if (dest_align == 0)
+ return NULL_RTX;
- if (arglist == NULL_TREE
- || TREE_CHAIN (arglist) == NULL_TREE)
- return const0_rtx;
- exp = TREE_VALUE (arglist);
- c = TREE_VALUE (TREE_CHAIN (arglist));
+ ann = tree_common_ann (orig_exp);
+ if (ann)
+ stringop_block_profile (ann->stmt, &expected_align, &expected_size);
+
+ if (expected_align < dest_align)
+ expected_align = dest_align;
- if (TREE_CODE (c) != INTEGER_CST)
+ /* If the LEN parameter is zero, return DEST. */
+ if (integer_zerop (len))
{
- error ("second arg to `__builtin_expect' must be a constant");
- c = integer_zero_node;
+ /* Evaluate and ignore VAL in case it has side-effects. */
+ expand_expr (val, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return expand_expr (dest, target, mode, EXPAND_NORMAL);
}
- target = expand_expr (exp, target, VOIDmode, EXPAND_NORMAL);
+ /* Stabilize the arguments in case we fail. */
+ dest = builtin_save_expr (dest);
+ val = builtin_save_expr (val);
+ len = builtin_save_expr (len);
- /* Don't bother with expected value notes for integral constants. */
- if (GET_CODE (target) != CONST_INT)
+ len_rtx = expand_normal (len);
+ dest_mem = get_memory_rtx (dest, len);
+
+ if (TREE_CODE (val) != INTEGER_CST)
{
- /* We do need to force this into a register so that we can be
- moderately sure to be able to correctly interpret the branch
- condition later. */
- target = force_reg (GET_MODE (target), target);
+ rtx val_rtx;
+
+ val_rtx = expand_normal (val);
+ val_rtx = convert_to_mode (TYPE_MODE (unsigned_char_type_node),
+ val_rtx, 0);
+
+ /* Assume that we can memset by pieces if we can store
+ * the coefficients by pieces (in the required modes).
+ * We can't pass builtin_memset_gen_str as that emits RTL. */
+ c = 1;
+ if (host_integerp (len, 1)
+ && can_store_by_pieces (tree_low_cst (len, 1),
+ builtin_memset_read_str, &c, dest_align,
+ true))
+ {
+ val_rtx = force_reg (TYPE_MODE (unsigned_char_type_node),
+ val_rtx);
+ store_by_pieces (dest_mem, tree_low_cst (len, 1),
+ builtin_memset_gen_str, val_rtx, dest_align,
+ true, 0);
+ }
+ else if (!set_storage_via_setmem (dest_mem, len_rtx, val_rtx,
+ dest_align, expected_align,
+ expected_size))
+ goto do_libcall;
+
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
+ }
- rtx_c = expand_expr (c, NULL_RTX, GET_MODE (target), EXPAND_NORMAL);
+ if (target_char_cast (val, &c))
+ goto do_libcall;
- note = emit_note (NULL, NOTE_INSN_EXPECTED_VALUE);
- NOTE_EXPECTED_VALUE (note) = gen_rtx_EQ (VOIDmode, target, rtx_c);
+ if (c)
+ {
+ if (host_integerp (len, 1)
+ && can_store_by_pieces (tree_low_cst (len, 1),
+ builtin_memset_read_str, &c, dest_align,
+ true))
+ store_by_pieces (dest_mem, tree_low_cst (len, 1),
+ builtin_memset_read_str, &c, dest_align, true, 0);
+ else if (!set_storage_via_setmem (dest_mem, len_rtx, GEN_INT (c),
+ dest_align, expected_align,
+ expected_size))
+ goto do_libcall;
+
+ dest_mem = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_mem = convert_memory_address (ptr_mode, dest_mem);
+ return dest_mem;
}
- return target;
-}
+ set_mem_align (dest_mem, dest_align);
+ dest_addr = clear_storage_hints (dest_mem, len_rtx,
+ CALL_EXPR_TAILCALL (orig_exp)
+ ? BLOCK_OP_TAILCALL : BLOCK_OP_NORMAL,
+ expected_align, expected_size);
-/* Like expand_builtin_expect, except do this in a jump context. This is
- called from do_jump if the conditional is a __builtin_expect. Return either
- a SEQUENCE of insns to emit the jump or NULL if we cannot optimize
- __builtin_expect. We need to optimize this at jump time so that machines
- like the PowerPC don't turn the test into a SCC operation, and then jump
- based on the test being 0/1. */
+ if (dest_addr == 0)
+ {
+ dest_addr = force_operand (XEXP (dest_mem, 0), NULL_RTX);
+ dest_addr = convert_memory_address (ptr_mode, dest_addr);
+ }
-rtx
-expand_builtin_expect_jump (exp, if_false_label, if_true_label)
- tree exp;
- rtx if_false_label;
- rtx if_true_label;
-{
- tree arglist = TREE_OPERAND (exp, 1);
- tree arg0 = TREE_VALUE (arglist);
- tree arg1 = TREE_VALUE (TREE_CHAIN (arglist));
- rtx ret = NULL_RTX;
-
- /* Only handle __builtin_expect (test, 0) and
- __builtin_expect (test, 1). */
- if (TREE_CODE (TREE_TYPE (arg1)) == INTEGER_TYPE
- && (integer_zerop (arg1) || integer_onep (arg1)))
- {
- int j;
- int num_jumps = 0;
-
- /* If we fail to locate an appropriate conditional jump, we'll
- fall back to normal evaluation. Ensure that the expression
- can be re-evaluated. */
- switch (unsafe_for_reeval (arg0))
- {
- case 0: /* Safe. */
- break;
+ return dest_addr;
- case 1: /* Mildly unsafe. */
- arg0 = unsave_expr (arg0);
- break;
+ do_libcall:
+ fndecl = get_callee_fndecl (orig_exp);
+ fcode = DECL_FUNCTION_CODE (fndecl);
+ if (fcode == BUILT_IN_MEMSET)
+ fn = build_call_expr (fndecl, 3, dest, val, len);
+ else if (fcode == BUILT_IN_BZERO)
+ fn = build_call_expr (fndecl, 2, dest, len);
+ else
+ gcc_unreachable ();
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (orig_exp);
+ return expand_call (fn, target, target == const0_rtx);
+}
- case 2: /* Wildly unsafe. */
- return NULL_RTX;
- }
+/* Expand expression EXP, which is a call to the bzero builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call. */
- /* Expand the jump insns. */
- start_sequence ();
- do_jump (arg0, if_false_label, if_true_label);
- ret = gen_sequence ();
- end_sequence ();
+static rtx
+expand_builtin_bzero (tree exp)
+{
+ tree dest, size;
- /* Now that the __builtin_expect has been validated, go through and add
- the expect's to each of the conditional jumps. If we run into an
- error, just give up and generate the 'safe' code of doing a SCC
- operation and then doing a branch on that. */
- for (j = 0; j < XVECLEN (ret, 0); j++)
- {
- rtx insn = XVECEXP (ret, 0, j);
- rtx pattern;
+ if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
- if (GET_CODE (insn) == JUMP_INSN && any_condjump_p (insn)
- && (pattern = pc_set (insn)) != NULL_RTX)
- {
- rtx ifelse = SET_SRC (pattern);
- rtx label;
- int taken;
+ dest = CALL_EXPR_ARG (exp, 0);
+ size = CALL_EXPR_ARG (exp, 1);
- if (GET_CODE (ifelse) != IF_THEN_ELSE)
- continue;
+ /* New argument list transforming bzero(ptr x, int y) to
+ memset(ptr x, int 0, size_t y). This is done this way
+ so that if it isn't expanded inline, we fallback to
+ calling bzero instead of memset. */
- if (GET_CODE (XEXP (ifelse, 1)) == LABEL_REF)
- {
- taken = 1;
- label = XEXP (XEXP (ifelse, 1), 0);
- }
- /* An inverted jump reverses the probabilities. */
- else if (GET_CODE (XEXP (ifelse, 2)) == LABEL_REF)
- {
- taken = 0;
- label = XEXP (XEXP (ifelse, 2), 0);
- }
- /* We shouldn't have to worry about conditional returns during
- the expansion stage, but handle it gracefully anyway. */
- else if (GET_CODE (XEXP (ifelse, 1)) == RETURN)
- {
- taken = 1;
- label = NULL_RTX;
- }
- /* An inverted return reverses the probabilities. */
- else if (GET_CODE (XEXP (ifelse, 2)) == RETURN)
- {
- taken = 0;
- label = NULL_RTX;
- }
- else
- continue;
-
- /* If the test is expected to fail, reverse the
- probabilities. */
- if (integer_zerop (arg1))
- taken = 1 - taken;
-
- /* If we are jumping to the false label, reverse the
- probabilities. */
- if (label == NULL_RTX)
- ; /* conditional return */
- else if (label == if_false_label)
- taken = 1 - taken;
- else if (label != if_true_label)
- continue;
-
- num_jumps++;
- predict_insn_def (insn, PRED_BUILTIN_EXPECT, taken);
- }
- }
+ return expand_builtin_memset_args (dest, integer_zero_node,
+ fold_convert (sizetype, size),
+ const0_rtx, VOIDmode, exp);
+}
- /* If no jumps were modified, fail and do __builtin_expect the normal
- way. */
- if (num_jumps == 0)
- ret = NULL_RTX;
- }
+/* Expand a call to the memchr builtin. Return NULL_RTX if we failed the
+ caller should emit a normal call, otherwise try to get the result
+ in TARGET, if convenient (and in mode MODE if that's convenient). */
- return ret;
+static rtx
+expand_builtin_memchr (tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE,
+ INTEGER_TYPE, VOID_TYPE))
+ {
+ tree type = TREE_TYPE (exp);
+ tree result = fold_builtin_memchr (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ CALL_EXPR_ARG (exp, 2), type);
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
}
-void
-expand_builtin_trap ()
+/* Expand expression EXP, which is a call to the memcmp built-in function.
+ Return NULL_RTX if we failed and the
+ caller should emit a normal call, otherwise try to get the result in
+ TARGET, if convenient (and in mode MODE, if that's convenient). */
+
+static rtx
+expand_builtin_memcmp (tree exp, rtx target, enum machine_mode mode)
{
-#ifdef HAVE_trap
- if (HAVE_trap)
- emit_insn (gen_trap ());
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
else
+ {
+ tree result = fold_builtin_memcmp (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ CALL_EXPR_ARG (exp, 2));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+
+#if defined HAVE_cmpmemsi || defined HAVE_cmpstrnsi
+ {
+ rtx arg1_rtx, arg2_rtx, arg3_rtx;
+ rtx result;
+ rtx insn;
+ tree arg1 = CALL_EXPR_ARG (exp, 0);
+ tree arg2 = CALL_EXPR_ARG (exp, 1);
+ tree len = CALL_EXPR_ARG (exp, 2);
+
+ int arg1_align
+ = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ int arg2_align
+ = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ enum machine_mode insn_mode;
+
+#ifdef HAVE_cmpmemsi
+ if (HAVE_cmpmemsi)
+ insn_mode = insn_data[(int) CODE_FOR_cmpmemsi].operand[0].mode;
+ else
#endif
- emit_library_call (abort_libfunc, LCT_NORETURN, VOIDmode, 0);
- emit_barrier ();
-}
-\f
-/* Expand an expression EXP that calls a built-in function,
- with result going to TARGET if that's convenient
- (and in mode MODE if that's convenient).
- SUBTARGET may be used as the target for computing one of EXP's operands.
- IGNORE is nonzero if the value is to be ignored. */
+#ifdef HAVE_cmpstrnsi
+ if (HAVE_cmpstrnsi)
+ insn_mode = insn_data[(int) CODE_FOR_cmpstrnsi].operand[0].mode;
+ else
+#endif
+ return NULL_RTX;
-rtx
-expand_builtin (exp, target, subtarget, mode, ignore)
- tree exp;
- rtx target;
- rtx subtarget;
- enum machine_mode mode;
- int ignore;
-{
- tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
- tree arglist = TREE_OPERAND (exp, 1);
- enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ /* If we don't have POINTER_TYPE, call the function. */
+ if (arg1_align == 0 || arg2_align == 0)
+ return NULL_RTX;
- /* Perform postincrements before expanding builtin functions. */
- emit_queue ();
+ /* Make a place to write the result of the instruction. */
+ result = target;
+ if (! (result != 0
+ && REG_P (result) && GET_MODE (result) == insn_mode
+ && REGNO (result) >= FIRST_PSEUDO_REGISTER))
+ result = gen_reg_rtx (insn_mode);
- if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
- return (*targetm.expand_builtin) (exp, target, subtarget, mode, ignore);
+ arg1_rtx = get_memory_rtx (arg1, len);
+ arg2_rtx = get_memory_rtx (arg2, len);
+ arg3_rtx = expand_normal (fold_convert (sizetype, len));
- /* When not optimizing, generate calls to library functions for a certain
- set of builtins. */
- if (!optimize && !CALLED_AS_BUILT_IN (fndecl))
- switch (fcode)
+ /* Set MEM_SIZE as appropriate. */
+ if (GET_CODE (arg3_rtx) == CONST_INT)
{
- case BUILT_IN_SIN:
- case BUILT_IN_COS:
- case BUILT_IN_SQRT:
- case BUILT_IN_SQRTF:
- case BUILT_IN_SQRTL:
- case BUILT_IN_MEMSET:
- case BUILT_IN_MEMCPY:
- case BUILT_IN_MEMCMP:
- case BUILT_IN_BCMP:
- case BUILT_IN_BZERO:
- case BUILT_IN_INDEX:
- case BUILT_IN_RINDEX:
- case BUILT_IN_STRCHR:
- case BUILT_IN_STRRCHR:
- case BUILT_IN_STRLEN:
- case BUILT_IN_STRCPY:
- case BUILT_IN_STRNCPY:
- case BUILT_IN_STRNCMP:
- case BUILT_IN_STRSTR:
- case BUILT_IN_STRPBRK:
- case BUILT_IN_STRCAT:
- case BUILT_IN_STRNCAT:
- case BUILT_IN_STRSPN:
- case BUILT_IN_STRCSPN:
- case BUILT_IN_STRCMP:
- case BUILT_IN_FFS:
- case BUILT_IN_PUTCHAR:
- case BUILT_IN_PUTS:
- case BUILT_IN_PRINTF:
- case BUILT_IN_FPUTC:
- case BUILT_IN_FPUTS:
- case BUILT_IN_FWRITE:
- case BUILT_IN_PUTCHAR_UNLOCKED:
- case BUILT_IN_PUTS_UNLOCKED:
- case BUILT_IN_PRINTF_UNLOCKED:
- case BUILT_IN_FPUTC_UNLOCKED:
- case BUILT_IN_FPUTS_UNLOCKED:
- case BUILT_IN_FWRITE_UNLOCKED:
- return expand_call (exp, target, ignore);
-
- default:
- break;
- }
+ set_mem_size (arg1_rtx, arg3_rtx);
+ set_mem_size (arg2_rtx, arg3_rtx);
+ }
- switch (fcode)
- {
- case BUILT_IN_ABS:
- case BUILT_IN_LABS:
- case BUILT_IN_LLABS:
- case BUILT_IN_IMAXABS:
- case BUILT_IN_FABS:
- case BUILT_IN_FABSF:
- case BUILT_IN_FABSL:
- /* build_function_call changes these into ABS_EXPR. */
- abort ();
-
- case BUILT_IN_CONJ:
- case BUILT_IN_CONJF:
- case BUILT_IN_CONJL:
- case BUILT_IN_CREAL:
- case BUILT_IN_CREALF:
- case BUILT_IN_CREALL:
- case BUILT_IN_CIMAG:
- case BUILT_IN_CIMAGF:
- case BUILT_IN_CIMAGL:
- /* expand_tree_builtin changes these into CONJ_EXPR, REALPART_EXPR
- and IMAGPART_EXPR. */
- abort ();
-
- case BUILT_IN_SIN:
- case BUILT_IN_SINF:
- case BUILT_IN_SINL:
- case BUILT_IN_COS:
- case BUILT_IN_COSF:
- case BUILT_IN_COSL:
- /* Treat these like sqrt only if unsafe math optimizations are allowed,
- because of possible accuracy problems. */
- if (! flag_unsafe_math_optimizations)
- break;
- case BUILT_IN_SQRT:
- case BUILT_IN_SQRTF:
- case BUILT_IN_SQRTL:
- target = expand_builtin_mathfn (exp, target, subtarget);
- if (target)
+#ifdef HAVE_cmpmemsi
+ if (HAVE_cmpmemsi)
+ insn = gen_cmpmemsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
+ GEN_INT (MIN (arg1_align, arg2_align)));
+ else
+#endif
+#ifdef HAVE_cmpstrnsi
+ if (HAVE_cmpstrnsi)
+ insn = gen_cmpstrnsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
+ GEN_INT (MIN (arg1_align, arg2_align)));
+ else
+#endif
+ gcc_unreachable ();
+
+ if (insn)
+ emit_insn (insn);
+ else
+ emit_library_call_value (memcmp_libfunc, result, LCT_PURE,
+ TYPE_MODE (integer_type_node), 3,
+ XEXP (arg1_rtx, 0), Pmode,
+ XEXP (arg2_rtx, 0), Pmode,
+ convert_to_mode (TYPE_MODE (sizetype), arg3_rtx,
+ TYPE_UNSIGNED (sizetype)),
+ TYPE_MODE (sizetype));
+
+ /* Return the value in the proper mode for this function. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
+ if (GET_MODE (result) == mode)
+ return result;
+ else if (target != 0)
+ {
+ convert_move (target, result, 0);
+ return target;
+ }
+ else
+ return convert_to_mode (mode, result, 0);
+ }
+#endif
+
+ return NULL_RTX;
+}
+
+/* Expand expression EXP, which is a call to the strcmp builtin. Return NULL_RTX
+ if we failed the caller should emit a normal call, otherwise try to get
+ the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strcmp (tree exp, rtx target, enum machine_mode mode)
+{
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ tree result = fold_builtin_strcmp (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+
+#if defined HAVE_cmpstrsi || defined HAVE_cmpstrnsi
+ if (cmpstr_optab[SImode] != CODE_FOR_nothing
+ || cmpstrn_optab[SImode] != CODE_FOR_nothing)
+ {
+ rtx arg1_rtx, arg2_rtx;
+ rtx result, insn = NULL_RTX;
+ tree fndecl, fn;
+ tree arg1 = CALL_EXPR_ARG (exp, 0);
+ tree arg2 = CALL_EXPR_ARG (exp, 1);
+
+ int arg1_align
+ = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ int arg2_align
+ = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+
+ /* If we don't have POINTER_TYPE, call the function. */
+ if (arg1_align == 0 || arg2_align == 0)
+ return NULL_RTX;
+
+ /* Stabilize the arguments in case gen_cmpstr(n)si fail. */
+ arg1 = builtin_save_expr (arg1);
+ arg2 = builtin_save_expr (arg2);
+
+ arg1_rtx = get_memory_rtx (arg1, NULL);
+ arg2_rtx = get_memory_rtx (arg2, NULL);
+
+#ifdef HAVE_cmpstrsi
+ /* Try to call cmpstrsi. */
+ if (HAVE_cmpstrsi)
+ {
+ enum machine_mode insn_mode
+ = insn_data[(int) CODE_FOR_cmpstrsi].operand[0].mode;
+
+ /* Make a place to write the result of the instruction. */
+ result = target;
+ if (! (result != 0
+ && REG_P (result) && GET_MODE (result) == insn_mode
+ && REGNO (result) >= FIRST_PSEUDO_REGISTER))
+ result = gen_reg_rtx (insn_mode);
+
+ insn = gen_cmpstrsi (result, arg1_rtx, arg2_rtx,
+ GEN_INT (MIN (arg1_align, arg2_align)));
+ }
+#endif
+#ifdef HAVE_cmpstrnsi
+ /* Try to determine at least one length and call cmpstrnsi. */
+ if (!insn && HAVE_cmpstrnsi)
+ {
+ tree len;
+ rtx arg3_rtx;
+
+ enum machine_mode insn_mode
+ = insn_data[(int) CODE_FOR_cmpstrnsi].operand[0].mode;
+ tree len1 = c_strlen (arg1, 1);
+ tree len2 = c_strlen (arg2, 1);
+
+ if (len1)
+ len1 = size_binop (PLUS_EXPR, ssize_int (1), len1);
+ if (len2)
+ len2 = size_binop (PLUS_EXPR, ssize_int (1), len2);
+
+ /* If we don't have a constant length for the first, use the length
+ of the second, if we know it. We don't require a constant for
+ this case; some cost analysis could be done if both are available
+ but neither is constant. For now, assume they're equally cheap,
+ unless one has side effects. If both strings have constant lengths,
+ use the smaller. */
+
+ if (!len1)
+ len = len2;
+ else if (!len2)
+ len = len1;
+ else if (TREE_SIDE_EFFECTS (len1))
+ len = len2;
+ else if (TREE_SIDE_EFFECTS (len2))
+ len = len1;
+ else if (TREE_CODE (len1) != INTEGER_CST)
+ len = len2;
+ else if (TREE_CODE (len2) != INTEGER_CST)
+ len = len1;
+ else if (tree_int_cst_lt (len1, len2))
+ len = len1;
+ else
+ len = len2;
+
+ /* If both arguments have side effects, we cannot optimize. */
+ if (!len || TREE_SIDE_EFFECTS (len))
+ goto do_libcall;
+
+ arg3_rtx = expand_normal (len);
+
+ /* Make a place to write the result of the instruction. */
+ result = target;
+ if (! (result != 0
+ && REG_P (result) && GET_MODE (result) == insn_mode
+ && REGNO (result) >= FIRST_PSEUDO_REGISTER))
+ result = gen_reg_rtx (insn_mode);
+
+ insn = gen_cmpstrnsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
+ GEN_INT (MIN (arg1_align, arg2_align)));
+ }
+#endif
+
+ if (insn)
+ {
+ emit_insn (insn);
+
+ /* Return the value in the proper mode for this function. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
+ if (GET_MODE (result) == mode)
+ return result;
+ if (target == 0)
+ return convert_to_mode (mode, result, 0);
+ convert_move (target, result, 0);
+ return target;
+ }
+
+ /* Expand the library call ourselves using a stabilized argument
+ list to avoid re-evaluating the function's arguments twice. */
+#ifdef HAVE_cmpstrnsi
+ do_libcall:
+#endif
+ fndecl = get_callee_fndecl (exp);
+ fn = build_call_expr (fndecl, 2, arg1, arg2);
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_call (fn, target, target == const0_rtx);
+ }
+#endif
+ return NULL_RTX;
+}
+
+/* Expand expression EXP, which is a call to the strncmp builtin. Return
+ NULL_RTX if we failed the caller should emit a normal call, otherwise try to get
+ the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strncmp (tree exp, rtx target, enum machine_mode mode)
+{
+ if (!validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ tree result = fold_builtin_strncmp (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ CALL_EXPR_ARG (exp, 2));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+
+ /* If c_strlen can determine an expression for one of the string
+ lengths, and it doesn't have side effects, then emit cmpstrnsi
+ using length MIN(strlen(string)+1, arg3). */
+#ifdef HAVE_cmpstrnsi
+ if (HAVE_cmpstrnsi)
+ {
+ tree len, len1, len2;
+ rtx arg1_rtx, arg2_rtx, arg3_rtx;
+ rtx result, insn;
+ tree fndecl, fn;
+ tree arg1 = CALL_EXPR_ARG (exp, 0);
+ tree arg2 = CALL_EXPR_ARG (exp, 1);
+ tree arg3 = CALL_EXPR_ARG (exp, 2);
+
+ int arg1_align
+ = get_pointer_alignment (arg1, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ int arg2_align
+ = get_pointer_alignment (arg2, BIGGEST_ALIGNMENT) / BITS_PER_UNIT;
+ enum machine_mode insn_mode
+ = insn_data[(int) CODE_FOR_cmpstrnsi].operand[0].mode;
+
+ len1 = c_strlen (arg1, 1);
+ len2 = c_strlen (arg2, 1);
+
+ if (len1)
+ len1 = size_binop (PLUS_EXPR, ssize_int (1), len1);
+ if (len2)
+ len2 = size_binop (PLUS_EXPR, ssize_int (1), len2);
+
+ /* If we don't have a constant length for the first, use the length
+ of the second, if we know it. We don't require a constant for
+ this case; some cost analysis could be done if both are available
+ but neither is constant. For now, assume they're equally cheap,
+ unless one has side effects. If both strings have constant lengths,
+ use the smaller. */
+
+ if (!len1)
+ len = len2;
+ else if (!len2)
+ len = len1;
+ else if (TREE_SIDE_EFFECTS (len1))
+ len = len2;
+ else if (TREE_SIDE_EFFECTS (len2))
+ len = len1;
+ else if (TREE_CODE (len1) != INTEGER_CST)
+ len = len2;
+ else if (TREE_CODE (len2) != INTEGER_CST)
+ len = len1;
+ else if (tree_int_cst_lt (len1, len2))
+ len = len1;
+ else
+ len = len2;
+
+ /* If both arguments have side effects, we cannot optimize. */
+ if (!len || TREE_SIDE_EFFECTS (len))
+ return NULL_RTX;
+
+ /* The actual new length parameter is MIN(len,arg3). */
+ len = fold_build2 (MIN_EXPR, TREE_TYPE (len), len,
+ fold_convert (TREE_TYPE (len), arg3));
+
+ /* If we don't have POINTER_TYPE, call the function. */
+ if (arg1_align == 0 || arg2_align == 0)
+ return NULL_RTX;
+
+ /* Make a place to write the result of the instruction. */
+ result = target;
+ if (! (result != 0
+ && REG_P (result) && GET_MODE (result) == insn_mode
+ && REGNO (result) >= FIRST_PSEUDO_REGISTER))
+ result = gen_reg_rtx (insn_mode);
+
+ /* Stabilize the arguments in case gen_cmpstrnsi fails. */
+ arg1 = builtin_save_expr (arg1);
+ arg2 = builtin_save_expr (arg2);
+ len = builtin_save_expr (len);
+
+ arg1_rtx = get_memory_rtx (arg1, len);
+ arg2_rtx = get_memory_rtx (arg2, len);
+ arg3_rtx = expand_normal (len);
+ insn = gen_cmpstrnsi (result, arg1_rtx, arg2_rtx, arg3_rtx,
+ GEN_INT (MIN (arg1_align, arg2_align)));
+ if (insn)
+ {
+ emit_insn (insn);
+
+ /* Return the value in the proper mode for this function. */
+ mode = TYPE_MODE (TREE_TYPE (exp));
+ if (GET_MODE (result) == mode)
+ return result;
+ if (target == 0)
+ return convert_to_mode (mode, result, 0);
+ convert_move (target, result, 0);
return target;
+ }
+
+ /* Expand the library call ourselves using a stabilized argument
+ list to avoid re-evaluating the function's arguments twice. */
+ fndecl = get_callee_fndecl (exp);
+ fn = build_call_expr (fndecl, 3, arg1, arg2, len);
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_call (fn, target, target == const0_rtx);
+ }
+#endif
+ return NULL_RTX;
+}
+
+/* Expand expression EXP, which is a call to the strcat builtin.
+ Return NULL_RTX if we failed the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strcat (tree fndecl, tree exp, rtx target, enum machine_mode mode)
+{
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+ else
+ {
+ tree dst = CALL_EXPR_ARG (exp, 0);
+ tree src = CALL_EXPR_ARG (exp, 1);
+ const char *p = c_getstr (src);
+
+ /* If the string length is zero, return the dst parameter. */
+ if (p && *p == '\0')
+ return expand_expr (dst, target, mode, EXPAND_NORMAL);
+
+ if (optimize_insn_for_speed_p ())
+ {
+ /* See if we can store by pieces into (dst + strlen(dst)). */
+ tree newsrc, newdst,
+ strlen_fn = implicit_built_in_decls[BUILT_IN_STRLEN];
+ rtx insns;
+
+ /* Stabilize the argument list. */
+ newsrc = builtin_save_expr (src);
+ dst = builtin_save_expr (dst);
+
+ start_sequence ();
+
+ /* Create strlen (dst). */
+ newdst = build_call_expr (strlen_fn, 1, dst);
+ /* Create (dst p+ strlen (dst)). */
+
+ newdst = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (dst), dst, newdst);
+ newdst = builtin_save_expr (newdst);
+
+ if (!expand_builtin_strcpy_args (fndecl, newdst, newsrc, target, mode))
+ {
+ end_sequence (); /* Stop sequence. */
+ return NULL_RTX;
+ }
+
+ /* Output the entire sequence. */
+ insns = get_insns ();
+ end_sequence ();
+ emit_insn (insns);
+
+ return expand_expr (dst, target, mode, EXPAND_NORMAL);
+ }
+
+ return NULL_RTX;
+ }
+}
+
+/* Expand expression EXP, which is a call to the strncat builtin.
+ Return NULL_RTX if we failed the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strncat (tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp,
+ POINTER_TYPE, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ {
+ tree result = fold_builtin_strncat (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ CALL_EXPR_ARG (exp, 2));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
+
+/* Expand expression EXP, which is a call to the strspn builtin.
+ Return NULL_RTX if we failed the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strspn (tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ tree result = fold_builtin_strspn (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
+
+/* Expand expression EXP, which is a call to the strcspn builtin.
+ Return NULL_RTX if we failed the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_strcspn (tree exp, rtx target, enum machine_mode mode)
+{
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ tree result = fold_builtin_strcspn (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1));
+ if (result)
+ return expand_expr (result, target, mode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
+
+/* Expand a call to __builtin_saveregs, generating the result in TARGET,
+ if that's convenient. */
+
+rtx
+expand_builtin_saveregs (void)
+{
+ rtx val, seq;
+
+ /* Don't do __builtin_saveregs more than once in a function.
+ Save the result of the first call and reuse it. */
+ if (saveregs_value != 0)
+ return saveregs_value;
+
+ /* When this function is called, it means that registers must be
+ saved on entry to this function. So we migrate the call to the
+ first insn of this function. */
+
+ start_sequence ();
+
+ /* Do whatever the machine needs done in this case. */
+ val = targetm.calls.expand_builtin_saveregs ();
+
+ seq = get_insns ();
+ end_sequence ();
+
+ saveregs_value = val;
+
+ /* Put the insns after the NOTE that starts the function. If this
+ is inside a start_sequence, make the outer-level insn chain current, so
+ the code is placed at the start of the function. */
+ push_topmost_sequence ();
+ emit_insn_after (seq, entry_of_function ());
+ pop_topmost_sequence ();
+
+ return val;
+}
+
+/* __builtin_args_info (N) returns word N of the arg space info
+ for the current function. The number and meanings of words
+ is controlled by the definition of CUMULATIVE_ARGS. */
+
+static rtx
+expand_builtin_args_info (tree exp)
+{
+ int nwords = sizeof (CUMULATIVE_ARGS) / sizeof (int);
+ int *word_ptr = (int *) &crtl->args.info;
+
+ gcc_assert (sizeof (CUMULATIVE_ARGS) % sizeof (int) == 0);
+
+ if (call_expr_nargs (exp) != 0)
+ {
+ if (!host_integerp (CALL_EXPR_ARG (exp, 0), 0))
+ error ("argument of %<__builtin_args_info%> must be constant");
+ else
+ {
+ HOST_WIDE_INT wordnum = tree_low_cst (CALL_EXPR_ARG (exp, 0), 0);
+
+ if (wordnum < 0 || wordnum >= nwords)
+ error ("argument of %<__builtin_args_info%> out of range");
+ else
+ return GEN_INT (word_ptr[wordnum]);
+ }
+ }
+ else
+ error ("missing argument in %<__builtin_args_info%>");
+
+ return const0_rtx;
+}
+
+/* Expand a call to __builtin_next_arg. */
+
+static rtx
+expand_builtin_next_arg (void)
+{
+ /* Checking arguments is already done in fold_builtin_next_arg
+ that must be called before this function. */
+ return expand_binop (ptr_mode, add_optab,
+ crtl->args.internal_arg_pointer,
+ crtl->args.arg_offset_rtx,
+ NULL_RTX, 0, OPTAB_LIB_WIDEN);
+}
+
+/* Make it easier for the backends by protecting the valist argument
+ from multiple evaluations. */
+
+static tree
+stabilize_va_list (tree valist, int needs_lvalue)
+{
+ tree vatype = targetm.canonical_va_list_type (TREE_TYPE (valist));
+
+ gcc_assert (vatype != NULL_TREE);
+
+ if (TREE_CODE (vatype) == ARRAY_TYPE)
+ {
+ if (TREE_SIDE_EFFECTS (valist))
+ valist = save_expr (valist);
+
+ /* For this case, the backends will be expecting a pointer to
+ vatype, but it's possible we've actually been given an array
+ (an actual TARGET_CANONICAL_VA_LIST_TYPE (valist)).
+ So fix it. */
+ if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
+ {
+ tree p1 = build_pointer_type (TREE_TYPE (vatype));
+ valist = build_fold_addr_expr_with_type (valist, p1);
+ }
+ }
+ else
+ {
+ tree pt;
+
+ if (! needs_lvalue)
+ {
+ if (! TREE_SIDE_EFFECTS (valist))
+ return valist;
+
+ pt = build_pointer_type (vatype);
+ valist = fold_build1 (ADDR_EXPR, pt, valist);
+ TREE_SIDE_EFFECTS (valist) = 1;
+ }
+
+ if (TREE_SIDE_EFFECTS (valist))
+ valist = save_expr (valist);
+ valist = build_fold_indirect_ref (valist);
+ }
+
+ return valist;
+}
+
+/* The "standard" definition of va_list is void*. */
+
+tree
+std_build_builtin_va_list (void)
+{
+ return ptr_type_node;
+}
+
+/* The "standard" abi va_list is va_list_type_node. */
+
+tree
+std_fn_abi_va_list (tree fndecl ATTRIBUTE_UNUSED)
+{
+ return va_list_type_node;
+}
+
+/* The "standard" type of va_list is va_list_type_node. */
+
+tree
+std_canonical_va_list_type (tree type)
+{
+ tree wtype, htype;
+
+ if (INDIRECT_REF_P (type))
+ type = TREE_TYPE (type);
+ else if (POINTER_TYPE_P (type) && POINTER_TYPE_P (TREE_TYPE(type)))
+ type = TREE_TYPE (type);
+ wtype = va_list_type_node;
+ htype = type;
+ /* Treat structure va_list types. */
+ if (TREE_CODE (wtype) == RECORD_TYPE && POINTER_TYPE_P (htype))
+ htype = TREE_TYPE (htype);
+ else if (TREE_CODE (wtype) == ARRAY_TYPE)
+ {
+ /* If va_list is an array type, the argument may have decayed
+ to a pointer type, e.g. by being passed to another function.
+ In that case, unwrap both types so that we can compare the
+ underlying records. */
+ if (TREE_CODE (htype) == ARRAY_TYPE
+ || POINTER_TYPE_P (htype))
+ {
+ wtype = TREE_TYPE (wtype);
+ htype = TREE_TYPE (htype);
+ }
+ }
+ if (TYPE_MAIN_VARIANT (wtype) == TYPE_MAIN_VARIANT (htype))
+ return va_list_type_node;
+
+ return NULL_TREE;
+}
+
+/* The "standard" implementation of va_start: just assign `nextarg' to
+ the variable. */
+
+void
+std_expand_builtin_va_start (tree valist, rtx nextarg)
+{
+ rtx va_r = expand_expr (valist, NULL_RTX, VOIDmode, EXPAND_WRITE);
+ convert_move (va_r, nextarg, 0);
+}
+
+/* Expand EXP, a call to __builtin_va_start. */
+
+static rtx
+expand_builtin_va_start (tree exp)
+{
+ rtx nextarg;
+ tree valist;
+
+ if (call_expr_nargs (exp) < 2)
+ {
+ error ("too few arguments to function %<va_start%>");
+ return const0_rtx;
+ }
+
+ if (fold_builtin_next_arg (exp, true))
+ return const0_rtx;
+
+ nextarg = expand_builtin_next_arg ();
+ valist = stabilize_va_list (CALL_EXPR_ARG (exp, 0), 1);
+
+ if (targetm.expand_builtin_va_start)
+ targetm.expand_builtin_va_start (valist, nextarg);
+ else
+ std_expand_builtin_va_start (valist, nextarg);
+
+ return const0_rtx;
+}
+
+/* The "standard" implementation of va_arg: read the value from the
+ current (padded) address and increment by the (padded) size. */
+
+tree
+std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
+ gimple_seq *post_p)
+{
+ tree addr, t, type_size, rounded_size, valist_tmp;
+ unsigned HOST_WIDE_INT align, boundary;
+ bool indirect;
+
+#ifdef ARGS_GROW_DOWNWARD
+ /* All of the alignment and movement below is for args-grow-up machines.
+ As of 2004, there are only 3 ARGS_GROW_DOWNWARD targets, and they all
+ implement their own specialized gimplify_va_arg_expr routines. */
+ gcc_unreachable ();
+#endif
+
+ indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false);
+ if (indirect)
+ type = build_pointer_type (type);
+
+ align = PARM_BOUNDARY / BITS_PER_UNIT;
+ boundary = FUNCTION_ARG_BOUNDARY (TYPE_MODE (type), type);
+
+ /* When we align parameter on stack for caller, if the parameter
+ alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
+ aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
+ here with caller. */
+ if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT)
+ boundary = MAX_SUPPORTED_STACK_ALIGNMENT;
+
+ boundary /= BITS_PER_UNIT;
+
+ /* Hoist the valist value into a temporary for the moment. */
+ valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL);
+
+ /* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
+ requires greater alignment, we must perform dynamic alignment. */
+ if (boundary > align
+ && !integer_zerop (TYPE_SIZE (type)))
+ {
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
+ fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (valist),
+ valist_tmp, size_int (boundary - 1)));
+ gimplify_and_add (t, pre_p);
+
+ t = fold_convert (sizetype, valist_tmp);
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
+ fold_convert (TREE_TYPE (valist),
+ fold_build2 (BIT_AND_EXPR, sizetype, t,
+ size_int (-boundary))));
+ gimplify_and_add (t, pre_p);
+ }
+ else
+ boundary = align;
+
+ /* If the actual alignment is less than the alignment of the type,
+ adjust the type accordingly so that we don't assume strict alignment
+ when dereferencing the pointer. */
+ boundary *= BITS_PER_UNIT;
+ if (boundary < TYPE_ALIGN (type))
+ {
+ type = build_variant_type_copy (type);
+ TYPE_ALIGN (type) = boundary;
+ }
+
+ /* Compute the rounded size of the type. */
+ type_size = size_in_bytes (type);
+ rounded_size = round_up (type_size, align);
+
+ /* Reduce rounded_size so it's sharable with the postqueue. */
+ gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue);
+
+ /* Get AP. */
+ addr = valist_tmp;
+ if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size))
+ {
+ /* Small args are padded downward. */
+ t = fold_build2 (GT_EXPR, sizetype, rounded_size, size_int (align));
+ t = fold_build3 (COND_EXPR, sizetype, t, size_zero_node,
+ size_binop (MINUS_EXPR, rounded_size, type_size));
+ addr = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (addr), addr, t);
+ }
+
+ /* Compute new value for AP. */
+ t = build2 (POINTER_PLUS_EXPR, TREE_TYPE (valist), valist_tmp, rounded_size);
+ t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t);
+ gimplify_and_add (t, pre_p);
+
+ addr = fold_convert (build_pointer_type (type), addr);
+
+ if (indirect)
+ addr = build_va_arg_indirect_ref (addr);
+
+ return build_va_arg_indirect_ref (addr);
+}
+
+/* Build an indirect-ref expression over the given TREE, which represents a
+ piece of a va_arg() expansion. */
+tree
+build_va_arg_indirect_ref (tree addr)
+{
+ addr = build_fold_indirect_ref (addr);
+
+ if (flag_mudflap) /* Don't instrument va_arg INDIRECT_REF. */
+ mf_mark (addr);
+
+ return addr;
+}
+
+/* Return a dummy expression of type TYPE in order to keep going after an
+ error. */
+
+static tree
+dummy_object (tree type)
+{
+ tree t = build_int_cst (build_pointer_type (type), 0);
+ return build1 (INDIRECT_REF, type, t);
+}
+
+/* Gimplify __builtin_va_arg, aka VA_ARG_EXPR, which is not really a
+ builtin function, but a very special sort of operator. */
+
+enum gimplify_status
+gimplify_va_arg_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
+{
+ tree promoted_type, have_va_type;
+ tree valist = TREE_OPERAND (*expr_p, 0);
+ tree type = TREE_TYPE (*expr_p);
+ tree t;
+
+ /* Verify that valist is of the proper type. */
+ have_va_type = TREE_TYPE (valist);
+ if (have_va_type == error_mark_node)
+ return GS_ERROR;
+ have_va_type = targetm.canonical_va_list_type (have_va_type);
+
+ if (have_va_type == NULL_TREE)
+ {
+ error ("first argument to %<va_arg%> not of type %<va_list%>");
+ return GS_ERROR;
+ }
+
+ /* Generate a diagnostic for requesting data of a type that cannot
+ be passed through `...' due to type promotion at the call site. */
+ if ((promoted_type = lang_hooks.types.type_promotes_to (type))
+ != type)
+ {
+ static bool gave_help;
+ bool warned;
+
+ /* Unfortunately, this is merely undefined, rather than a constraint
+ violation, so we cannot make this an error. If this call is never
+ executed, the program is still strictly conforming. */
+ warned = warning (0, "%qT is promoted to %qT when passed through %<...%>",
+ type, promoted_type);
+ if (!gave_help && warned)
+ {
+ gave_help = true;
+ inform (input_location, "(so you should pass %qT not %qT to %<va_arg%>)",
+ promoted_type, type);
+ }
+
+ /* We can, however, treat "undefined" any way we please.
+ Call abort to encourage the user to fix the program. */
+ if (warned)
+ inform (input_location, "if this code is reached, the program will abort");
+ /* Before the abort, allow the evaluation of the va_list
+ expression to exit or longjmp. */
+ gimplify_and_add (valist, pre_p);
+ t = build_call_expr (implicit_built_in_decls[BUILT_IN_TRAP], 0);
+ gimplify_and_add (t, pre_p);
+
+ /* This is dead code, but go ahead and finish so that the
+ mode of the result comes out right. */
+ *expr_p = dummy_object (type);
+ return GS_ALL_DONE;
+ }
+ else
+ {
+ /* Make it easier for the backends by protecting the valist argument
+ from multiple evaluations. */
+ if (TREE_CODE (have_va_type) == ARRAY_TYPE)
+ {
+ /* For this case, the backends will be expecting a pointer to
+ TREE_TYPE (abi), but it's possible we've
+ actually been given an array (an actual TARGET_FN_ABI_VA_LIST).
+ So fix it. */
+ if (TREE_CODE (TREE_TYPE (valist)) == ARRAY_TYPE)
+ {
+ tree p1 = build_pointer_type (TREE_TYPE (have_va_type));
+ valist = build_fold_addr_expr_with_type (valist, p1);
+ }
+
+ gimplify_expr (&valist, pre_p, post_p, is_gimple_val, fb_rvalue);
+ }
+ else
+ gimplify_expr (&valist, pre_p, post_p, is_gimple_min_lval, fb_lvalue);
+
+ if (!targetm.gimplify_va_arg_expr)
+ /* FIXME: Once most targets are converted we should merely
+ assert this is non-null. */
+ return GS_ALL_DONE;
+
+ *expr_p = targetm.gimplify_va_arg_expr (valist, type, pre_p, post_p);
+ return GS_OK;
+ }
+}
+
+/* Expand EXP, a call to __builtin_va_end. */
+
+static rtx
+expand_builtin_va_end (tree exp)
+{
+ tree valist = CALL_EXPR_ARG (exp, 0);
+
+ /* Evaluate for side effects, if needed. I hate macros that don't
+ do that. */
+ if (TREE_SIDE_EFFECTS (valist))
+ expand_expr (valist, const0_rtx, VOIDmode, EXPAND_NORMAL);
+
+ return const0_rtx;
+}
+
+/* Expand EXP, a call to __builtin_va_copy. We do this as a
+ builtin rather than just as an assignment in stdarg.h because of the
+ nastiness of array-type va_list types. */
+
+static rtx
+expand_builtin_va_copy (tree exp)
+{
+ tree dst, src, t;
+
+ dst = CALL_EXPR_ARG (exp, 0);
+ src = CALL_EXPR_ARG (exp, 1);
+
+ dst = stabilize_va_list (dst, 1);
+ src = stabilize_va_list (src, 0);
+
+ gcc_assert (cfun != NULL && cfun->decl != NULL_TREE);
+
+ if (TREE_CODE (targetm.fn_abi_va_list (cfun->decl)) != ARRAY_TYPE)
+ {
+ t = build2 (MODIFY_EXPR, targetm.fn_abi_va_list (cfun->decl), dst, src);
+ TREE_SIDE_EFFECTS (t) = 1;
+ expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ }
+ else
+ {
+ rtx dstb, srcb, size;
+
+ /* Evaluate to pointers. */
+ dstb = expand_expr (dst, NULL_RTX, Pmode, EXPAND_NORMAL);
+ srcb = expand_expr (src, NULL_RTX, Pmode, EXPAND_NORMAL);
+ size = expand_expr (TYPE_SIZE_UNIT (targetm.fn_abi_va_list (cfun->decl)),
+ NULL_RTX, VOIDmode, EXPAND_NORMAL);
+
+ dstb = convert_memory_address (Pmode, dstb);
+ srcb = convert_memory_address (Pmode, srcb);
+
+ /* "Dereference" to BLKmode memories. */
+ dstb = gen_rtx_MEM (BLKmode, dstb);
+ set_mem_alias_set (dstb, get_alias_set (TREE_TYPE (TREE_TYPE (dst))));
+ set_mem_align (dstb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl)));
+ srcb = gen_rtx_MEM (BLKmode, srcb);
+ set_mem_alias_set (srcb, get_alias_set (TREE_TYPE (TREE_TYPE (src))));
+ set_mem_align (srcb, TYPE_ALIGN (targetm.fn_abi_va_list (cfun->decl)));
+
+ /* Copy. */
+ emit_block_move (dstb, srcb, size, BLOCK_OP_NORMAL);
+ }
+
+ return const0_rtx;
+}
+
+/* Expand a call to one of the builtin functions __builtin_frame_address or
+ __builtin_return_address. */
+
+static rtx
+expand_builtin_frame_address (tree fndecl, tree exp)
+{
+ /* The argument must be a nonnegative integer constant.
+ It counts the number of frames to scan up the stack.
+ The value is the return address saved in that frame. */
+ if (call_expr_nargs (exp) == 0)
+ /* Warning about missing arg was already issued. */
+ return const0_rtx;
+ else if (! host_integerp (CALL_EXPR_ARG (exp, 0), 1))
+ {
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
+ error ("invalid argument to %<__builtin_frame_address%>");
+ else
+ error ("invalid argument to %<__builtin_return_address%>");
+ return const0_rtx;
+ }
+ else
+ {
+ rtx tem
+ = expand_builtin_return_addr (DECL_FUNCTION_CODE (fndecl),
+ tree_low_cst (CALL_EXPR_ARG (exp, 0), 1));
+
+ /* Some ports cannot access arbitrary stack frames. */
+ if (tem == NULL)
+ {
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
+ warning (0, "unsupported argument to %<__builtin_frame_address%>");
+ else
+ warning (0, "unsupported argument to %<__builtin_return_address%>");
+ return const0_rtx;
+ }
+
+ /* For __builtin_frame_address, return what we've got. */
+ if (DECL_FUNCTION_CODE (fndecl) == BUILT_IN_FRAME_ADDRESS)
+ return tem;
+
+ if (!REG_P (tem)
+ && ! CONSTANT_P (tem))
+ tem = copy_to_mode_reg (Pmode, tem);
+ return tem;
+ }
+}
+
+/* Expand EXP, a call to the alloca builtin. Return NULL_RTX if
+ we failed and the caller should emit a normal call, otherwise try to get
+ the result in TARGET, if convenient. */
+
+static rtx
+expand_builtin_alloca (tree exp, rtx target)
+{
+ rtx op0;
+ rtx result;
+
+ /* In -fmudflap-instrumented code, alloca() and __builtin_alloca()
+ should always expand to function calls. These can be intercepted
+ in libmudflap. */
+ if (flag_mudflap)
+ return NULL_RTX;
+
+ if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ /* Compute the argument. */
+ op0 = expand_normal (CALL_EXPR_ARG (exp, 0));
+
+ /* Allocate the desired space. */
+ result = allocate_dynamic_stack_space (op0, target, BITS_PER_UNIT);
+ result = convert_memory_address (ptr_mode, result);
+
+ return result;
+}
+
+/* Expand a call to a bswap builtin with argument ARG0. MODE
+ is the mode to expand with. */
+
+static rtx
+expand_builtin_bswap (tree exp, rtx target, rtx subtarget)
+{
+ enum machine_mode mode;
+ tree arg;
+ rtx op0;
+
+ if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+ mode = TYPE_MODE (TREE_TYPE (arg));
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+
+ target = expand_unop (mode, bswap_optab, op0, target, 1);
+
+ gcc_assert (target);
+
+ return convert_to_mode (mode, target, 0);
+}
+
+/* Expand a call to a unary builtin in EXP.
+ Return NULL_RTX if a normal call should be emitted rather than expanding the
+ function in-line. If convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing one of EXP's operands. */
+
+static rtx
+expand_builtin_unop (enum machine_mode target_mode, tree exp, rtx target,
+ rtx subtarget, optab op_optab)
+{
+ rtx op0;
+
+ if (!validate_arglist (exp, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ /* Compute the argument. */
+ op0 = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget,
+ VOIDmode, EXPAND_NORMAL);
+ /* Compute op, into TARGET if possible.
+ Set TARGET to wherever the result comes back. */
+ target = expand_unop (TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 0))),
+ op_optab, op0, target, 1);
+ gcc_assert (target);
+
+ return convert_to_mode (target_mode, target, 0);
+}
+
+/* If the string passed to fputs is a constant and is one character
+ long, we attempt to transform this call into __builtin_fputc(). */
+
+static rtx
+expand_builtin_fputs (tree exp, rtx target, bool unlocked)
+{
+ /* Verify the arguments in the original call. */
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ tree result = fold_builtin_fputs (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1),
+ (target == const0_rtx),
+ unlocked, NULL_TREE);
+ if (result)
+ return expand_expr (result, target, VOIDmode, EXPAND_NORMAL);
+ }
+ return NULL_RTX;
+}
+
+/* Expand a call to __builtin_expect. We just return our argument
+ as the builtin_expect semantic should've been already executed by
+ tree branch prediction pass. */
+
+static rtx
+expand_builtin_expect (tree exp, rtx target)
+{
+ tree arg, c;
+
+ if (call_expr_nargs (exp) < 2)
+ return const0_rtx;
+ arg = CALL_EXPR_ARG (exp, 0);
+ c = CALL_EXPR_ARG (exp, 1);
+
+ target = expand_expr (arg, target, VOIDmode, EXPAND_NORMAL);
+ /* When guessing was done, the hints should be already stripped away. */
+ gcc_assert (!flag_guess_branch_prob
+ || optimize == 0 || errorcount || sorrycount);
+ return target;
+}
+
+void
+expand_builtin_trap (void)
+{
+#ifdef HAVE_trap
+ if (HAVE_trap)
+ emit_insn (gen_trap ());
+ else
+#endif
+ emit_library_call (abort_libfunc, LCT_NORETURN, VOIDmode, 0);
+ emit_barrier ();
+}
+
+/* Expand EXP, a call to fabs, fabsf or fabsl.
+ Return NULL_RTX if a normal call should be emitted rather than expanding
+ the function inline. If convenient, the result should be placed
+ in TARGET. SUBTARGET may be used as the target for computing
+ the operand. */
+
+static rtx
+expand_builtin_fabs (tree exp, rtx target, rtx subtarget)
+{
+ enum machine_mode mode;
+ tree arg;
+ rtx op0;
+
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+ CALL_EXPR_ARG (exp, 0) = arg = builtin_save_expr (arg);
+ mode = TYPE_MODE (TREE_TYPE (arg));
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+ return expand_abs (mode, op0, target, 0, safe_from_p (target, arg, 1));
+}
+
+/* Expand EXP, a call to copysign, copysignf, or copysignl.
+ Return NULL is a normal call should be emitted rather than expanding the
+ function inline. If convenient, the result should be placed in TARGET.
+ SUBTARGET may be used as the target for computing the operand. */
+
+static rtx
+expand_builtin_copysign (tree exp, rtx target, rtx subtarget)
+{
+ rtx op0, op1;
+ tree arg;
+
+ if (!validate_arglist (exp, REAL_TYPE, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+ op0 = expand_expr (arg, subtarget, VOIDmode, EXPAND_NORMAL);
+
+ arg = CALL_EXPR_ARG (exp, 1);
+ op1 = expand_normal (arg);
+
+ return expand_copysign (op0, op1, target);
+}
+
+/* Create a new constant string literal and return a char* pointer to it.
+ The STRING_CST value is the LEN characters at STR. */
+tree
+build_string_literal (int len, const char *str)
+{
+ tree t, elem, index, type;
+
+ t = build_string (len, str);
+ elem = build_type_variant (char_type_node, 1, 0);
+ index = build_index_type (size_int (len - 1));
+ type = build_array_type (elem, index);
+ TREE_TYPE (t) = type;
+ TREE_CONSTANT (t) = 1;
+ TREE_READONLY (t) = 1;
+ TREE_STATIC (t) = 1;
+
+ type = build_pointer_type (elem);
+ t = build1 (ADDR_EXPR, type,
+ build4 (ARRAY_REF, elem,
+ t, integer_zero_node, NULL_TREE, NULL_TREE));
+ return t;
+}
+
+/* Expand EXP, a call to printf or printf_unlocked.
+ Return NULL_RTX if a normal call should be emitted rather than transforming
+ the function inline. If convenient, the result should be placed in
+ TARGET with mode MODE. UNLOCKED indicates this is a printf_unlocked
+ call. */
+static rtx
+expand_builtin_printf (tree exp, rtx target, enum machine_mode mode,
+ bool unlocked)
+{
+ /* If we're using an unlocked function, assume the other unlocked
+ functions exist explicitly. */
+ tree const fn_putchar = unlocked ? built_in_decls[BUILT_IN_PUTCHAR_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_PUTCHAR];
+ tree const fn_puts = unlocked ? built_in_decls[BUILT_IN_PUTS_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_PUTS];
+ const char *fmt_str;
+ tree fn = 0;
+ tree fmt, arg;
+ int nargs = call_expr_nargs (exp);
+
+ /* If the return value is used, don't do the transformation. */
+ if (target != const0_rtx)
+ return NULL_RTX;
+
+ /* Verify the required arguments in the original call. */
+ if (nargs == 0)
+ return NULL_RTX;
+ fmt = CALL_EXPR_ARG (exp, 0);
+ if (! POINTER_TYPE_P (TREE_TYPE (fmt)))
+ return NULL_RTX;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_RTX;
+
+ if (!init_target_chars ())
+ return NULL_RTX;
+
+ /* If the format specifier was "%s\n", call __builtin_puts(arg). */
+ if (strcmp (fmt_str, target_percent_s_newline) == 0)
+ {
+ if ((nargs != 2)
+ || ! POINTER_TYPE_P (TREE_TYPE (CALL_EXPR_ARG (exp, 1))))
+ return NULL_RTX;
+ if (fn_puts)
+ fn = build_call_expr (fn_puts, 1, CALL_EXPR_ARG (exp, 1));
+ }
+ /* If the format specifier was "%c", call __builtin_putchar(arg). */
+ else if (strcmp (fmt_str, target_percent_c) == 0)
+ {
+ if ((nargs != 2)
+ || TREE_CODE (TREE_TYPE (CALL_EXPR_ARG (exp, 1))) != INTEGER_TYPE)
+ return NULL_RTX;
+ if (fn_putchar)
+ fn = build_call_expr (fn_putchar, 1, CALL_EXPR_ARG (exp, 1));
+ }
+ else
+ {
+ /* We can't handle anything else with % args or %% ... yet. */
+ if (strchr (fmt_str, target_percent))
+ return NULL_RTX;
+
+ if (nargs > 1)
+ return NULL_RTX;
+
+ /* If the format specifier was "", printf does nothing. */
+ if (fmt_str[0] == '\0')
+ return const0_rtx;
+ /* If the format specifier has length of 1, call putchar. */
+ if (fmt_str[1] == '\0')
+ {
+ /* Given printf("c"), (where c is any one character,)
+ convert "c"[0] to an int and pass that to the replacement
+ function. */
+ arg = build_int_cst (NULL_TREE, fmt_str[0]);
+ if (fn_putchar)
+ fn = build_call_expr (fn_putchar, 1, arg);
+ }
+ else
+ {
+ /* If the format specifier was "string\n", call puts("string"). */
+ size_t len = strlen (fmt_str);
+ if ((unsigned char)fmt_str[len - 1] == target_newline)
+ {
+ /* Create a NUL-terminated string that's one char shorter
+ than the original, stripping off the trailing '\n'. */
+ char *newstr = XALLOCAVEC (char, len);
+ memcpy (newstr, fmt_str, len - 1);
+ newstr[len - 1] = 0;
+ arg = build_string_literal (len, newstr);
+ if (fn_puts)
+ fn = build_call_expr (fn_puts, 1, arg);
+ }
+ else
+ /* We'd like to arrange to call fputs(string,stdout) here,
+ but we need stdout and don't have a way to get it yet. */
+ return NULL_RTX;
+ }
+ }
+
+ if (!fn)
+ return NULL_RTX;
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_expr (fn, target, mode, EXPAND_NORMAL);
+}
+
+/* Expand EXP, a call to fprintf or fprintf_unlocked.
+ Return NULL_RTX if a normal call should be emitted rather than transforming
+ the function inline. If convenient, the result should be placed in
+ TARGET with mode MODE. UNLOCKED indicates this is a fprintf_unlocked
+ call. */
+static rtx
+expand_builtin_fprintf (tree exp, rtx target, enum machine_mode mode,
+ bool unlocked)
+{
+ /* If we're using an unlocked function, assume the other unlocked
+ functions exist explicitly. */
+ tree const fn_fputc = unlocked ? built_in_decls[BUILT_IN_FPUTC_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FPUTC];
+ tree const fn_fputs = unlocked ? built_in_decls[BUILT_IN_FPUTS_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FPUTS];
+ const char *fmt_str;
+ tree fn = 0;
+ tree fmt, fp, arg;
+ int nargs = call_expr_nargs (exp);
+
+ /* If the return value is used, don't do the transformation. */
+ if (target != const0_rtx)
+ return NULL_RTX;
+
+ /* Verify the required arguments in the original call. */
+ if (nargs < 2)
+ return NULL_RTX;
+ fp = CALL_EXPR_ARG (exp, 0);
+ if (! POINTER_TYPE_P (TREE_TYPE (fp)))
+ return NULL_RTX;
+ fmt = CALL_EXPR_ARG (exp, 1);
+ if (! POINTER_TYPE_P (TREE_TYPE (fmt)))
+ return NULL_RTX;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_RTX;
+
+ if (!init_target_chars ())
+ return NULL_RTX;
+
+ /* If the format specifier was "%s", call __builtin_fputs(arg,fp). */
+ if (strcmp (fmt_str, target_percent_s) == 0)
+ {
+ if ((nargs != 3)
+ || ! POINTER_TYPE_P (TREE_TYPE (CALL_EXPR_ARG (exp, 2))))
+ return NULL_RTX;
+ arg = CALL_EXPR_ARG (exp, 2);
+ if (fn_fputs)
+ fn = build_call_expr (fn_fputs, 2, arg, fp);
+ }
+ /* If the format specifier was "%c", call __builtin_fputc(arg,fp). */
+ else if (strcmp (fmt_str, target_percent_c) == 0)
+ {
+ if ((nargs != 3)
+ || TREE_CODE (TREE_TYPE (CALL_EXPR_ARG (exp, 2))) != INTEGER_TYPE)
+ return NULL_RTX;
+ arg = CALL_EXPR_ARG (exp, 2);
+ if (fn_fputc)
+ fn = build_call_expr (fn_fputc, 2, arg, fp);
+ }
+ else
+ {
+ /* We can't handle anything else with % args or %% ... yet. */
+ if (strchr (fmt_str, target_percent))
+ return NULL_RTX;
+
+ if (nargs > 2)
+ return NULL_RTX;
+
+ /* If the format specifier was "", fprintf does nothing. */
+ if (fmt_str[0] == '\0')
+ {
+ /* Evaluate and ignore FILE* argument for side-effects. */
+ expand_expr (fp, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return const0_rtx;
+ }
+
+ /* When "string" doesn't contain %, replace all cases of
+ fprintf(stream,string) with fputs(string,stream). The fputs
+ builtin will take care of special cases like length == 1. */
+ if (fn_fputs)
+ fn = build_call_expr (fn_fputs, 2, fmt, fp);
+ }
+
+ if (!fn)
+ return NULL_RTX;
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_expr (fn, target, mode, EXPAND_NORMAL);
+}
+
+/* Expand a call EXP to sprintf. Return NULL_RTX if
+ a normal call should be emitted rather than expanding the function
+ inline. If convenient, the result should be placed in TARGET with
+ mode MODE. */
+
+static rtx
+expand_builtin_sprintf (tree exp, rtx target, enum machine_mode mode)
+{
+ tree dest, fmt;
+ const char *fmt_str;
+ int nargs = call_expr_nargs (exp);
+
+ /* Verify the required arguments in the original call. */
+ if (nargs < 2)
+ return NULL_RTX;
+ dest = CALL_EXPR_ARG (exp, 0);
+ if (! POINTER_TYPE_P (TREE_TYPE (dest)))
+ return NULL_RTX;
+ fmt = CALL_EXPR_ARG (exp, 0);
+ if (! POINTER_TYPE_P (TREE_TYPE (fmt)))
+ return NULL_RTX;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_RTX;
+
+ if (!init_target_chars ())
+ return NULL_RTX;
+
+ /* If the format doesn't contain % args or %%, use strcpy. */
+ if (strchr (fmt_str, target_percent) == 0)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+ tree exp;
+
+ if ((nargs > 2) || ! fn)
+ return NULL_RTX;
+ expand_expr (build_call_expr (fn, 2, dest, fmt),
+ const0_rtx, VOIDmode, EXPAND_NORMAL);
+ if (target == const0_rtx)
+ return const0_rtx;
+ exp = build_int_cst (NULL_TREE, strlen (fmt_str));
+ return expand_expr (exp, target, mode, EXPAND_NORMAL);
+ }
+ /* If the format is "%s", use strcpy if the result isn't used. */
+ else if (strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree fn, arg, len;
+ fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+
+ if (! fn)
+ return NULL_RTX;
+ if (nargs != 3)
+ return NULL_RTX;
+ arg = CALL_EXPR_ARG (exp, 2);
+ if (! POINTER_TYPE_P (TREE_TYPE (arg)))
+ return NULL_RTX;
+
+ if (target != const0_rtx)
+ {
+ len = c_strlen (arg, 1);
+ if (! len || TREE_CODE (len) != INTEGER_CST)
+ return NULL_RTX;
+ }
+ else
+ len = NULL_TREE;
+
+ expand_expr (build_call_expr (fn, 2, dest, arg),
+ const0_rtx, VOIDmode, EXPAND_NORMAL);
+
+ if (target == const0_rtx)
+ return const0_rtx;
+ return expand_expr (len, target, mode, EXPAND_NORMAL);
+ }
+
+ return NULL_RTX;
+}
+
+/* Expand a call to either the entry or exit function profiler. */
+
+static rtx
+expand_builtin_profile_func (bool exitp)
+{
+ rtx this_rtx, which;
+
+ this_rtx = DECL_RTL (current_function_decl);
+ gcc_assert (MEM_P (this_rtx));
+ this_rtx = XEXP (this_rtx, 0);
+
+ if (exitp)
+ which = profile_function_exit_libfunc;
+ else
+ which = profile_function_entry_libfunc;
+
+ emit_library_call (which, LCT_NORMAL, VOIDmode, 2, this_rtx, Pmode,
+ expand_builtin_return_addr (BUILT_IN_RETURN_ADDRESS,
+ 0),
+ Pmode);
+
+ return const0_rtx;
+}
+
+/* Expand a call to __builtin___clear_cache. */
+
+static rtx
+expand_builtin___clear_cache (tree exp ATTRIBUTE_UNUSED)
+{
+#ifndef HAVE_clear_cache
+#ifdef CLEAR_INSN_CACHE
+ /* There is no "clear_cache" insn, and __clear_cache() in libgcc
+ does something. Just do the default expansion to a call to
+ __clear_cache(). */
+ return NULL_RTX;
+#else
+ /* There is no "clear_cache" insn, and __clear_cache() in libgcc
+ does nothing. There is no need to call it. Do nothing. */
+ return const0_rtx;
+#endif /* CLEAR_INSN_CACHE */
+#else
+ /* We have a "clear_cache" insn, and it will handle everything. */
+ tree begin, end;
+ rtx begin_rtx, end_rtx;
+ enum insn_code icode;
+
+ /* We must not expand to a library call. If we did, any
+ fallback library function in libgcc that might contain a call to
+ __builtin___clear_cache() would recurse infinitely. */
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ error ("both arguments to %<__builtin___clear_cache%> must be pointers");
+ return const0_rtx;
+ }
+
+ if (HAVE_clear_cache)
+ {
+ icode = CODE_FOR_clear_cache;
+
+ begin = CALL_EXPR_ARG (exp, 0);
+ begin_rtx = expand_expr (begin, NULL_RTX, Pmode, EXPAND_NORMAL);
+ begin_rtx = convert_memory_address (Pmode, begin_rtx);
+ if (!insn_data[icode].operand[0].predicate (begin_rtx, Pmode))
+ begin_rtx = copy_to_mode_reg (Pmode, begin_rtx);
+
+ end = CALL_EXPR_ARG (exp, 1);
+ end_rtx = expand_expr (end, NULL_RTX, Pmode, EXPAND_NORMAL);
+ end_rtx = convert_memory_address (Pmode, end_rtx);
+ if (!insn_data[icode].operand[1].predicate (end_rtx, Pmode))
+ end_rtx = copy_to_mode_reg (Pmode, end_rtx);
+
+ emit_insn (gen_clear_cache (begin_rtx, end_rtx));
+ }
+ return const0_rtx;
+#endif /* HAVE_clear_cache */
+}
+
+/* Given a trampoline address, make sure it satisfies TRAMPOLINE_ALIGNMENT. */
+
+static rtx
+round_trampoline_addr (rtx tramp)
+{
+ rtx temp, addend, mask;
+
+ /* If we don't need too much alignment, we'll have been guaranteed
+ proper alignment by get_trampoline_type. */
+ if (TRAMPOLINE_ALIGNMENT <= STACK_BOUNDARY)
+ return tramp;
+
+ /* Round address up to desired boundary. */
+ temp = gen_reg_rtx (Pmode);
+ addend = GEN_INT (TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT - 1);
+ mask = GEN_INT (-TRAMPOLINE_ALIGNMENT / BITS_PER_UNIT);
+
+ temp = expand_simple_binop (Pmode, PLUS, tramp, addend,
+ temp, 0, OPTAB_LIB_WIDEN);
+ tramp = expand_simple_binop (Pmode, AND, temp, mask,
+ temp, 0, OPTAB_LIB_WIDEN);
+
+ return tramp;
+}
+
+static rtx
+expand_builtin_init_trampoline (tree exp)
+{
+ tree t_tramp, t_func, t_chain;
+ rtx r_tramp, r_func, r_chain;
+#ifdef TRAMPOLINE_TEMPLATE
+ rtx blktramp;
+#endif
+
+ if (!validate_arglist (exp, POINTER_TYPE, POINTER_TYPE,
+ POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ t_tramp = CALL_EXPR_ARG (exp, 0);
+ t_func = CALL_EXPR_ARG (exp, 1);
+ t_chain = CALL_EXPR_ARG (exp, 2);
+
+ r_tramp = expand_normal (t_tramp);
+ r_func = expand_normal (t_func);
+ r_chain = expand_normal (t_chain);
+
+ /* Generate insns to initialize the trampoline. */
+ r_tramp = round_trampoline_addr (r_tramp);
+#ifdef TRAMPOLINE_TEMPLATE
+ blktramp = gen_rtx_MEM (BLKmode, r_tramp);
+ set_mem_align (blktramp, TRAMPOLINE_ALIGNMENT);
+ emit_block_move (blktramp, assemble_trampoline_template (),
+ GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL);
+#endif
+ trampolines_created = 1;
+ INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);
+
+ return const0_rtx;
+}
+
+static rtx
+expand_builtin_adjust_trampoline (tree exp)
+{
+ rtx tramp;
+
+ if (!validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ tramp = expand_normal (CALL_EXPR_ARG (exp, 0));
+ tramp = round_trampoline_addr (tramp);
+#ifdef TRAMPOLINE_ADJUST_ADDRESS
+ TRAMPOLINE_ADJUST_ADDRESS (tramp);
+#endif
+
+ return tramp;
+}
+
+/* Expand the call EXP to the built-in signbit, signbitf or signbitl
+ function. The function first checks whether the back end provides
+ an insn to implement signbit for the respective mode. If not, it
+ checks whether the floating point format of the value is such that
+ the sign bit can be extracted. If that is not the case, the
+ function returns NULL_RTX to indicate that a normal call should be
+ emitted rather than expanding the function in-line. EXP is the
+ expression that is a call to the builtin function; if convenient,
+ the result should be placed in TARGET. */
+static rtx
+expand_builtin_signbit (tree exp, rtx target)
+{
+ const struct real_format *fmt;
+ enum machine_mode fmode, imode, rmode;
+ HOST_WIDE_INT hi, lo;
+ tree arg;
+ int word, bitpos;
+ enum insn_code icode;
+ rtx temp;
+
+ if (!validate_arglist (exp, REAL_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ arg = CALL_EXPR_ARG (exp, 0);
+ fmode = TYPE_MODE (TREE_TYPE (arg));
+ rmode = TYPE_MODE (TREE_TYPE (exp));
+ fmt = REAL_MODE_FORMAT (fmode);
+
+ arg = builtin_save_expr (arg);
+
+ /* Expand the argument yielding a RTX expression. */
+ temp = expand_normal (arg);
+
+ /* Check if the back end provides an insn that handles signbit for the
+ argument's mode. */
+ icode = signbit_optab->handlers [(int) fmode].insn_code;
+ if (icode != CODE_FOR_nothing)
+ {
+ target = gen_reg_rtx (TYPE_MODE (TREE_TYPE (exp)));
+ emit_unop_insn (icode, target, temp, UNKNOWN);
+ return target;
+ }
+
+ /* For floating point formats without a sign bit, implement signbit
+ as "ARG < 0.0". */
+ bitpos = fmt->signbit_ro;
+ if (bitpos < 0)
+ {
+ /* But we can't do this if the format supports signed zero. */
+ if (fmt->has_signed_zero && HONOR_SIGNED_ZEROS (fmode))
+ return NULL_RTX;
+
+ arg = fold_build2 (LT_EXPR, TREE_TYPE (exp), arg,
+ build_real (TREE_TYPE (arg), dconst0));
+ return expand_expr (arg, target, VOIDmode, EXPAND_NORMAL);
+ }
+
+ if (GET_MODE_SIZE (fmode) <= UNITS_PER_WORD)
+ {
+ imode = int_mode_for_mode (fmode);
+ if (imode == BLKmode)
+ return NULL_RTX;
+ temp = gen_lowpart (imode, temp);
+ }
+ else
+ {
+ imode = word_mode;
+ /* Handle targets with different FP word orders. */
+ if (FLOAT_WORDS_BIG_ENDIAN)
+ word = (GET_MODE_BITSIZE (fmode) - bitpos) / BITS_PER_WORD;
+ else
+ word = bitpos / BITS_PER_WORD;
+ temp = operand_subword_force (temp, word, fmode);
+ bitpos = bitpos % BITS_PER_WORD;
+ }
+
+ /* Force the intermediate word_mode (or narrower) result into a
+ register. This avoids attempting to create paradoxical SUBREGs
+ of floating point modes below. */
+ temp = force_reg (imode, temp);
+
+ /* If the bitpos is within the "result mode" lowpart, the operation
+ can be implement with a single bitwise AND. Otherwise, we need
+ a right shift and an AND. */
+
+ if (bitpos < GET_MODE_BITSIZE (rmode))
+ {
+ if (bitpos < HOST_BITS_PER_WIDE_INT)
+ {
+ hi = 0;
+ lo = (HOST_WIDE_INT) 1 << bitpos;
+ }
+ else
+ {
+ hi = (HOST_WIDE_INT) 1 << (bitpos - HOST_BITS_PER_WIDE_INT);
+ lo = 0;
+ }
+
+ if (GET_MODE_SIZE (imode) > GET_MODE_SIZE (rmode))
+ temp = gen_lowpart (rmode, temp);
+ temp = expand_binop (rmode, and_optab, temp,
+ immed_double_const (lo, hi, rmode),
+ NULL_RTX, 1, OPTAB_LIB_WIDEN);
+ }
+ else
+ {
+ /* Perform a logical right shift to place the signbit in the least
+ significant bit, then truncate the result to the desired mode
+ and mask just this bit. */
+ temp = expand_shift (RSHIFT_EXPR, imode, temp,
+ build_int_cst (NULL_TREE, bitpos), NULL_RTX, 1);
+ temp = gen_lowpart (rmode, temp);
+ temp = expand_binop (rmode, and_optab, temp, const1_rtx,
+ NULL_RTX, 1, OPTAB_LIB_WIDEN);
+ }
+
+ return temp;
+}
+
+/* Expand fork or exec calls. TARGET is the desired target of the
+ call. EXP is the call. FN is the
+ identificator of the actual function. IGNORE is nonzero if the
+ value is to be ignored. */
+
+static rtx
+expand_builtin_fork_or_exec (tree fn, tree exp, rtx target, int ignore)
+{
+ tree id, decl;
+ tree call;
+
+ /* If we are not profiling, just call the function. */
+ if (!profile_arc_flag)
+ return NULL_RTX;
+
+ /* Otherwise call the wrapper. This should be equivalent for the rest of
+ compiler, so the code does not diverge, and the wrapper may run the
+ code necessary for keeping the profiling sane. */
+
+ switch (DECL_FUNCTION_CODE (fn))
+ {
+ case BUILT_IN_FORK:
+ id = get_identifier ("__gcov_fork");
+ break;
+
+ case BUILT_IN_EXECL:
+ id = get_identifier ("__gcov_execl");
+ break;
+
+ case BUILT_IN_EXECV:
+ id = get_identifier ("__gcov_execv");
+ break;
+
+ case BUILT_IN_EXECLP:
+ id = get_identifier ("__gcov_execlp");
+ break;
+
+ case BUILT_IN_EXECLE:
+ id = get_identifier ("__gcov_execle");
+ break;
+
+ case BUILT_IN_EXECVP:
+ id = get_identifier ("__gcov_execvp");
+ break;
+
+ case BUILT_IN_EXECVE:
+ id = get_identifier ("__gcov_execve");
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ decl = build_decl (FUNCTION_DECL, id, TREE_TYPE (fn));
+ DECL_EXTERNAL (decl) = 1;
+ TREE_PUBLIC (decl) = 1;
+ DECL_ARTIFICIAL (decl) = 1;
+ TREE_NOTHROW (decl) = 1;
+ DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
+ DECL_VISIBILITY_SPECIFIED (decl) = 1;
+ call = rewrite_call_expr (exp, 0, decl, 0);
+ return expand_call (call, target, ignore);
+ }
+
+
+\f
+/* Reconstitute a mode for a __sync intrinsic operation. Since the type of
+ the pointer in these functions is void*, the tree optimizers may remove
+ casts. The mode computed in expand_builtin isn't reliable either, due
+ to __sync_bool_compare_and_swap.
+
+ FCODE_DIFF should be fcode - base, where base is the FOO_1 code for the
+ group of builtins. This gives us log2 of the mode size. */
+
+static inline enum machine_mode
+get_builtin_sync_mode (int fcode_diff)
+{
+ /* The size is not negotiable, so ask not to get BLKmode in return
+ if the target indicates that a smaller size would be better. */
+ return mode_for_size (BITS_PER_UNIT << fcode_diff, MODE_INT, 0);
+}
+
+/* Expand the memory expression LOC and return the appropriate memory operand
+ for the builtin_sync operations. */
+
+static rtx
+get_builtin_sync_mem (tree loc, enum machine_mode mode)
+{
+ rtx addr, mem;
+
+ addr = expand_expr (loc, NULL_RTX, Pmode, EXPAND_SUM);
+
+ /* Note that we explicitly do not want any alias information for this
+ memory, so that we kill all other live memories. Otherwise we don't
+ satisfy the full barrier semantics of the intrinsic. */
+ mem = validize_mem (gen_rtx_MEM (mode, addr));
+
+ set_mem_align (mem, get_pointer_alignment (loc, BIGGEST_ALIGNMENT));
+ set_mem_alias_set (mem, ALIAS_SET_MEMORY_BARRIER);
+ MEM_VOLATILE_P (mem) = 1;
+
+ return mem;
+}
+
+/* Expand the __sync_xxx_and_fetch and __sync_fetch_and_xxx intrinsics.
+ EXP is the CALL_EXPR. CODE is the rtx code
+ that corresponds to the arithmetic or logical operation from the name;
+ an exception here is that NOT actually means NAND. TARGET is an optional
+ place for us to store the results; AFTER is true if this is the
+ fetch_and_xxx form. IGNORE is true if we don't actually care about
+ the result of the operation at all. */
+
+static rtx
+expand_builtin_sync_operation (enum machine_mode mode, tree exp,
+ enum rtx_code code, bool after,
+ rtx target, bool ignore)
+{
+ rtx val, mem;
+ enum machine_mode old_mode;
+
+ if (code == NOT && warn_sync_nand)
+ {
+ tree fndecl = get_callee_fndecl (exp);
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+
+ static bool warned_f_a_n, warned_n_a_f;
+
+ switch (fcode)
+ {
+ case BUILT_IN_FETCH_AND_NAND_1:
+ case BUILT_IN_FETCH_AND_NAND_2:
+ case BUILT_IN_FETCH_AND_NAND_4:
+ case BUILT_IN_FETCH_AND_NAND_8:
+ case BUILT_IN_FETCH_AND_NAND_16:
+
+ if (warned_f_a_n)
+ break;
+
+ fndecl = implicit_built_in_decls[BUILT_IN_FETCH_AND_NAND_N];
+ inform (input_location,
+ "%qD changed semantics in GCC 4.4", fndecl);
+ warned_f_a_n = true;
+ break;
+
+ case BUILT_IN_NAND_AND_FETCH_1:
+ case BUILT_IN_NAND_AND_FETCH_2:
+ case BUILT_IN_NAND_AND_FETCH_4:
+ case BUILT_IN_NAND_AND_FETCH_8:
+ case BUILT_IN_NAND_AND_FETCH_16:
+
+ if (warned_n_a_f)
+ break;
+
+ fndecl = implicit_built_in_decls[BUILT_IN_NAND_AND_FETCH_N];
+ inform (input_location,
+ "%qD changed semantics in GCC 4.4", fndecl);
+ warned_n_a_f = true;
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ }
+
+ /* Expand the operands. */
+ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode);
+
+ val = expand_expr (CALL_EXPR_ARG (exp, 1), NULL_RTX, mode, EXPAND_NORMAL);
+ /* If VAL is promoted to a wider mode, convert it back to MODE. Take care
+ of CONST_INTs, where we know the old_mode only from the call argument. */
+ old_mode = GET_MODE (val);
+ if (old_mode == VOIDmode)
+ old_mode = TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 1)));
+ val = convert_modes (mode, old_mode, val, 1);
+
+ if (ignore)
+ return expand_sync_operation (mem, val, code);
+ else
+ return expand_sync_fetch_operation (mem, val, code, after, target);
+}
+
+/* Expand the __sync_val_compare_and_swap and __sync_bool_compare_and_swap
+ intrinsics. EXP is the CALL_EXPR. IS_BOOL is
+ true if this is the boolean form. TARGET is a place for us to store the
+ results; this is NOT optional if IS_BOOL is true. */
+
+static rtx
+expand_builtin_compare_and_swap (enum machine_mode mode, tree exp,
+ bool is_bool, rtx target)
+{
+ rtx old_val, new_val, mem;
+ enum machine_mode old_mode;
+
+ /* Expand the operands. */
+ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode);
+
+
+ old_val = expand_expr (CALL_EXPR_ARG (exp, 1), NULL_RTX,
+ mode, EXPAND_NORMAL);
+ /* If VAL is promoted to a wider mode, convert it back to MODE. Take care
+ of CONST_INTs, where we know the old_mode only from the call argument. */
+ old_mode = GET_MODE (old_val);
+ if (old_mode == VOIDmode)
+ old_mode = TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 1)));
+ old_val = convert_modes (mode, old_mode, old_val, 1);
+
+ new_val = expand_expr (CALL_EXPR_ARG (exp, 2), NULL_RTX,
+ mode, EXPAND_NORMAL);
+ /* If VAL is promoted to a wider mode, convert it back to MODE. Take care
+ of CONST_INTs, where we know the old_mode only from the call argument. */
+ old_mode = GET_MODE (new_val);
+ if (old_mode == VOIDmode)
+ old_mode = TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 2)));
+ new_val = convert_modes (mode, old_mode, new_val, 1);
+
+ if (is_bool)
+ return expand_bool_compare_and_swap (mem, old_val, new_val, target);
+ else
+ return expand_val_compare_and_swap (mem, old_val, new_val, target);
+}
+
+/* Expand the __sync_lock_test_and_set intrinsic. Note that the most
+ general form is actually an atomic exchange, and some targets only
+ support a reduced form with the second argument being a constant 1.
+ EXP is the CALL_EXPR; TARGET is an optional place for us to store
+ the results. */
+
+static rtx
+expand_builtin_lock_test_and_set (enum machine_mode mode, tree exp,
+ rtx target)
+{
+ rtx val, mem;
+ enum machine_mode old_mode;
+
+ /* Expand the operands. */
+ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode);
+ val = expand_expr (CALL_EXPR_ARG (exp, 1), NULL_RTX, mode, EXPAND_NORMAL);
+ /* If VAL is promoted to a wider mode, convert it back to MODE. Take care
+ of CONST_INTs, where we know the old_mode only from the call argument. */
+ old_mode = GET_MODE (val);
+ if (old_mode == VOIDmode)
+ old_mode = TYPE_MODE (TREE_TYPE (CALL_EXPR_ARG (exp, 1)));
+ val = convert_modes (mode, old_mode, val, 1);
+
+ return expand_sync_lock_test_and_set (mem, val, target);
+}
+
+/* Expand the __sync_synchronize intrinsic. */
+
+static void
+expand_builtin_synchronize (void)
+{
+ tree x;
+
+#ifdef HAVE_memory_barrier
+ if (HAVE_memory_barrier)
+ {
+ emit_insn (gen_memory_barrier ());
+ return;
+ }
+#endif
+
+ if (synchronize_libfunc != NULL_RTX)
+ {
+ emit_library_call (synchronize_libfunc, LCT_NORMAL, VOIDmode, 0);
+ return;
+ }
+
+ /* If no explicit memory barrier instruction is available, create an
+ empty asm stmt with a memory clobber. */
+ x = build4 (ASM_EXPR, void_type_node, build_string (0, ""), NULL, NULL,
+ tree_cons (NULL, build_string (6, "memory"), NULL));
+ ASM_VOLATILE_P (x) = 1;
+ expand_asm_expr (x);
+}
+
+/* Expand the __sync_lock_release intrinsic. EXP is the CALL_EXPR. */
+
+static void
+expand_builtin_lock_release (enum machine_mode mode, tree exp)
+{
+ enum insn_code icode;
+ rtx mem, insn;
+ rtx val = const0_rtx;
+
+ /* Expand the operands. */
+ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode);
+
+ /* If there is an explicit operation in the md file, use it. */
+ icode = sync_lock_release[mode];
+ if (icode != CODE_FOR_nothing)
+ {
+ if (!insn_data[icode].operand[1].predicate (val, mode))
+ val = force_reg (mode, val);
+
+ insn = GEN_FCN (icode) (mem, val);
+ if (insn)
+ {
+ emit_insn (insn);
+ return;
+ }
+ }
+
+ /* Otherwise we can implement this operation by emitting a barrier
+ followed by a store of zero. */
+ expand_builtin_synchronize ();
+ emit_move_insn (mem, val);
+}
+\f
+/* Expand an expression EXP that calls a built-in function,
+ with result going to TARGET if that's convenient
+ (and in mode MODE if that's convenient).
+ SUBTARGET may be used as the target for computing one of EXP's operands.
+ IGNORE is nonzero if the value is to be ignored. */
+
+rtx
+expand_builtin (tree exp, rtx target, rtx subtarget, enum machine_mode mode,
+ int ignore)
+{
+ tree fndecl = get_callee_fndecl (exp);
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ enum machine_mode target_mode = TYPE_MODE (TREE_TYPE (exp));
+
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ return targetm.expand_builtin (exp, target, subtarget, mode, ignore);
+
+ /* When not optimizing, generate calls to library functions for a certain
+ set of builtins. */
+ if (!optimize
+ && !called_as_built_in (fndecl)
+ && DECL_ASSEMBLER_NAME_SET_P (fndecl)
+ && fcode != BUILT_IN_ALLOCA
+ && fcode != BUILT_IN_FREE)
+ return expand_call (exp, target, ignore);
+
+ /* The built-in function expanders test for target == const0_rtx
+ to determine whether the function's result will be ignored. */
+ if (ignore)
+ target = const0_rtx;
+
+ /* If the result of a pure or const built-in function is ignored, and
+ none of its arguments are volatile, we can avoid expanding the
+ built-in call and just evaluate the arguments for side-effects. */
+ if (target == const0_rtx
+ && (DECL_PURE_P (fndecl) || TREE_READONLY (fndecl)))
+ {
+ bool volatilep = false;
+ tree arg;
+ call_expr_arg_iterator iter;
+
+ FOR_EACH_CALL_EXPR_ARG (arg, iter, exp)
+ if (TREE_THIS_VOLATILE (arg))
+ {
+ volatilep = true;
+ break;
+ }
+
+ if (! volatilep)
+ {
+ FOR_EACH_CALL_EXPR_ARG (arg, iter, exp)
+ expand_expr (arg, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return const0_rtx;
+ }
+ }
+
+ switch (fcode)
+ {
+ CASE_FLT_FN (BUILT_IN_FABS):
+ target = expand_builtin_fabs (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_COPYSIGN):
+ target = expand_builtin_copysign (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ /* Just do a normal library call if we were unable to fold
+ the values. */
+ CASE_FLT_FN (BUILT_IN_CABS):
+ break;
+
+ CASE_FLT_FN (BUILT_IN_EXP):
+ CASE_FLT_FN (BUILT_IN_EXP10):
+ CASE_FLT_FN (BUILT_IN_POW10):
+ CASE_FLT_FN (BUILT_IN_EXP2):
+ CASE_FLT_FN (BUILT_IN_EXPM1):
+ CASE_FLT_FN (BUILT_IN_LOGB):
+ CASE_FLT_FN (BUILT_IN_LOG):
+ CASE_FLT_FN (BUILT_IN_LOG10):
+ CASE_FLT_FN (BUILT_IN_LOG2):
+ CASE_FLT_FN (BUILT_IN_LOG1P):
+ CASE_FLT_FN (BUILT_IN_TAN):
+ CASE_FLT_FN (BUILT_IN_ASIN):
+ CASE_FLT_FN (BUILT_IN_ACOS):
+ CASE_FLT_FN (BUILT_IN_ATAN):
+ /* Treat these like sqrt only if unsafe math optimizations are allowed,
+ because of possible accuracy problems. */
+ if (! flag_unsafe_math_optimizations)
+ break;
+ CASE_FLT_FN (BUILT_IN_SQRT):
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ CASE_FLT_FN (BUILT_IN_RINT):
+ target = expand_builtin_mathfn (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ILOGB):
+ if (! flag_unsafe_math_optimizations)
+ break;
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ case BUILT_IN_ISFINITE:
+ case BUILT_IN_ISNORMAL:
+ target = expand_builtin_interclass_mathfn (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LCEIL):
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ target = expand_builtin_int_roundingfn (exp, target);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LRINT):
+ CASE_FLT_FN (BUILT_IN_LLRINT):
+ CASE_FLT_FN (BUILT_IN_LROUND):
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ target = expand_builtin_int_roundingfn_2 (exp, target);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_POW):
+ target = expand_builtin_pow (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_POWI):
+ target = expand_builtin_powi (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ATAN2):
+ CASE_FLT_FN (BUILT_IN_LDEXP):
+ CASE_FLT_FN (BUILT_IN_SCALB):
+ CASE_FLT_FN (BUILT_IN_SCALBN):
+ CASE_FLT_FN (BUILT_IN_SCALBLN):
+ if (! flag_unsafe_math_optimizations)
+ break;
+
+ CASE_FLT_FN (BUILT_IN_FMOD):
+ CASE_FLT_FN (BUILT_IN_REMAINDER):
+ CASE_FLT_FN (BUILT_IN_DREM):
+ target = expand_builtin_mathfn_2 (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_CEXPI):
+ target = expand_builtin_cexpi (exp, target, subtarget);
+ gcc_assert (target);
+ return target;
+
+ CASE_FLT_FN (BUILT_IN_SIN):
+ CASE_FLT_FN (BUILT_IN_COS):
+ if (! flag_unsafe_math_optimizations)
+ break;
+ target = expand_builtin_mathfn_3 (exp, target, subtarget);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_SINCOS):
+ if (! flag_unsafe_math_optimizations)
+ break;
+ target = expand_builtin_sincos (exp);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_APPLY_ARGS:
+ return expand_builtin_apply_args ();
+
+ /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes
+ FUNCTION with a copy of the parameters described by
+ ARGUMENTS, and ARGSIZE. It returns a block of memory
+ allocated on the stack into which is stored all the registers
+ that might possibly be used for returning the result of a
+ function. ARGUMENTS is the value returned by
+ __builtin_apply_args. ARGSIZE is the number of bytes of
+ arguments that must be copied. ??? How should this value be
+ computed? We'll also need a safe worst case value for varargs
+ functions. */
+ case BUILT_IN_APPLY:
+ if (!validate_arglist (exp, POINTER_TYPE,
+ POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)
+ && !validate_arglist (exp, REFERENCE_TYPE,
+ POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return const0_rtx;
+ else
+ {
+ rtx ops[3];
+
+ ops[0] = expand_normal (CALL_EXPR_ARG (exp, 0));
+ ops[1] = expand_normal (CALL_EXPR_ARG (exp, 1));
+ ops[2] = expand_normal (CALL_EXPR_ARG (exp, 2));
+
+ return expand_builtin_apply (ops[0], ops[1], ops[2]);
+ }
+
+ /* __builtin_return (RESULT) causes the function to return the
+ value described by RESULT. RESULT is address of the block of
+ memory returned by __builtin_apply. */
+ case BUILT_IN_RETURN:
+ if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ expand_builtin_return (expand_normal (CALL_EXPR_ARG (exp, 0)));
+ return const0_rtx;
+
+ case BUILT_IN_SAVEREGS:
+ return expand_builtin_saveregs ();
+
+ case BUILT_IN_ARGS_INFO:
+ return expand_builtin_args_info (exp);
+
+ case BUILT_IN_VA_ARG_PACK:
+ /* All valid uses of __builtin_va_arg_pack () are removed during
+ inlining. */
+ error ("%Kinvalid use of %<__builtin_va_arg_pack ()%>", exp);
+ return const0_rtx;
+
+ case BUILT_IN_VA_ARG_PACK_LEN:
+ /* All valid uses of __builtin_va_arg_pack_len () are removed during
+ inlining. */
+ error ("%Kinvalid use of %<__builtin_va_arg_pack_len ()%>", exp);
+ return const0_rtx;
+
+ /* Return the address of the first anonymous stack arg. */
+ case BUILT_IN_NEXT_ARG:
+ if (fold_builtin_next_arg (exp, false))
+ return const0_rtx;
+ return expand_builtin_next_arg ();
+
+ case BUILT_IN_CLEAR_CACHE:
+ target = expand_builtin___clear_cache (exp);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_CLASSIFY_TYPE:
+ return expand_builtin_classify_type (exp);
+
+ case BUILT_IN_CONSTANT_P:
+ return const0_rtx;
+
+ case BUILT_IN_FRAME_ADDRESS:
+ case BUILT_IN_RETURN_ADDRESS:
+ return expand_builtin_frame_address (fndecl, exp);
+
+ /* Returns the address of the area where the structure is returned.
+ 0 otherwise. */
+ case BUILT_IN_AGGREGATE_INCOMING_ADDRESS:
+ if (call_expr_nargs (exp) != 0
+ || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))
+ || !MEM_P (DECL_RTL (DECL_RESULT (current_function_decl))))
+ return const0_rtx;
+ else
+ return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0);
+
+ case BUILT_IN_ALLOCA:
+ target = expand_builtin_alloca (exp, target);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STACK_SAVE:
+ return expand_stack_save ();
+
+ case BUILT_IN_STACK_RESTORE:
+ expand_stack_restore (CALL_EXPR_ARG (exp, 0));
+ return const0_rtx;
+
+ case BUILT_IN_BSWAP32:
+ case BUILT_IN_BSWAP64:
+ target = expand_builtin_bswap (exp, target, subtarget);
+
+ if (target)
+ return target;
+ break;
+
+ CASE_INT_FN (BUILT_IN_FFS):
+ case BUILT_IN_FFSIMAX:
+ target = expand_builtin_unop (target_mode, exp, target,
+ subtarget, ffs_optab);
+ if (target)
+ return target;
+ break;
+
+ CASE_INT_FN (BUILT_IN_CLZ):
+ case BUILT_IN_CLZIMAX:
+ target = expand_builtin_unop (target_mode, exp, target,
+ subtarget, clz_optab);
+ if (target)
+ return target;
+ break;
+
+ CASE_INT_FN (BUILT_IN_CTZ):
+ case BUILT_IN_CTZIMAX:
+ target = expand_builtin_unop (target_mode, exp, target,
+ subtarget, ctz_optab);
+ if (target)
+ return target;
+ break;
+
+ CASE_INT_FN (BUILT_IN_POPCOUNT):
+ case BUILT_IN_POPCOUNTIMAX:
+ target = expand_builtin_unop (target_mode, exp, target,
+ subtarget, popcount_optab);
+ if (target)
+ return target;
+ break;
+
+ CASE_INT_FN (BUILT_IN_PARITY):
+ case BUILT_IN_PARITYIMAX:
+ target = expand_builtin_unop (target_mode, exp, target,
+ subtarget, parity_optab);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRLEN:
+ target = expand_builtin_strlen (exp, target, target_mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRCPY:
+ target = expand_builtin_strcpy (fndecl, exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRNCPY:
+ target = expand_builtin_strncpy (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STPCPY:
+ target = expand_builtin_stpcpy (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRCAT:
+ target = expand_builtin_strcat (fndecl, exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRNCAT:
+ target = expand_builtin_strncat (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRSPN:
+ target = expand_builtin_strspn (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRCSPN:
+ target = expand_builtin_strcspn (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRSTR:
+ target = expand_builtin_strstr (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRPBRK:
+ target = expand_builtin_strpbrk (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_INDEX:
+ case BUILT_IN_STRCHR:
+ target = expand_builtin_strchr (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_RINDEX:
+ case BUILT_IN_STRRCHR:
+ target = expand_builtin_strrchr (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_MEMCPY:
+ target = expand_builtin_memcpy (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_MEMPCPY:
+ target = expand_builtin_mempcpy (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_MEMMOVE:
+ target = expand_builtin_memmove (exp, target, mode, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_BCOPY:
+ target = expand_builtin_bcopy (exp, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_MEMSET:
+ target = expand_builtin_memset (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_BZERO:
+ target = expand_builtin_bzero (exp);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRCMP:
+ target = expand_builtin_strcmp (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRNCMP:
+ target = expand_builtin_strncmp (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_MEMCHR:
+ target = expand_builtin_memchr (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_BCMP:
+ case BUILT_IN_MEMCMP:
+ target = expand_builtin_memcmp (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_SETJMP:
+ /* This should have been lowered to the builtins below. */
+ gcc_unreachable ();
+
+ case BUILT_IN_SETJMP_SETUP:
+ /* __builtin_setjmp_setup is passed a pointer to an array of five words
+ and the receiver label. */
+ if (validate_arglist (exp, POINTER_TYPE, POINTER_TYPE, VOID_TYPE))
+ {
+ rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget,
+ VOIDmode, EXPAND_NORMAL);
+ tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 1), 0);
+ rtx label_r = label_rtx (label);
+
+ /* This is copied from the handling of non-local gotos. */
+ expand_builtin_setjmp_setup (buf_addr, label_r);
+ nonlocal_goto_handler_labels
+ = gen_rtx_EXPR_LIST (VOIDmode, label_r,
+ nonlocal_goto_handler_labels);
+ /* ??? Do not let expand_label treat us as such since we would
+ not want to be both on the list of non-local labels and on
+ the list of forced labels. */
+ FORCED_LABEL (label) = 0;
+ return const0_rtx;
+ }
+ break;
+
+ case BUILT_IN_SETJMP_DISPATCHER:
+ /* __builtin_setjmp_dispatcher is passed the dispatcher label. */
+ if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ {
+ tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 0), 0);
+ rtx label_r = label_rtx (label);
+
+ /* Remove the dispatcher label from the list of non-local labels
+ since the receiver labels have been added to it above. */
+ remove_node_from_expr_list (label_r, &nonlocal_goto_handler_labels);
+ return const0_rtx;
+ }
+ break;
+
+ case BUILT_IN_SETJMP_RECEIVER:
+ /* __builtin_setjmp_receiver is passed the receiver label. */
+ if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ {
+ tree label = TREE_OPERAND (CALL_EXPR_ARG (exp, 0), 0);
+ rtx label_r = label_rtx (label);
+
+ expand_builtin_setjmp_receiver (label_r);
+ return const0_rtx;
+ }
+ break;
+
+ /* __builtin_longjmp is passed a pointer to an array of five words.
+ It's similar to the C library longjmp function but works with
+ __builtin_setjmp above. */
+ case BUILT_IN_LONGJMP:
+ if (validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ {
+ rtx buf_addr = expand_expr (CALL_EXPR_ARG (exp, 0), subtarget,
+ VOIDmode, EXPAND_NORMAL);
+ rtx value = expand_normal (CALL_EXPR_ARG (exp, 1));
+
+ if (value != const1_rtx)
+ {
+ error ("%<__builtin_longjmp%> second argument must be 1");
+ return const0_rtx;
+ }
+
+ expand_builtin_longjmp (buf_addr, value);
+ return const0_rtx;
+ }
+ break;
+
+ case BUILT_IN_NONLOCAL_GOTO:
+ target = expand_builtin_nonlocal_goto (exp);
+ if (target)
+ return target;
+ break;
+
+ /* This updates the setjmp buffer that is its argument with the value
+ of the current stack pointer. */
+ case BUILT_IN_UPDATE_SETJMP_BUF:
+ if (validate_arglist (exp, POINTER_TYPE, VOID_TYPE))
+ {
+ rtx buf_addr
+ = expand_normal (CALL_EXPR_ARG (exp, 0));
+
+ expand_builtin_update_setjmp_buf (buf_addr);
+ return const0_rtx;
+ }
+ break;
+
+ case BUILT_IN_TRAP:
+ expand_builtin_trap ();
+ return const0_rtx;
+
+ case BUILT_IN_PRINTF:
+ target = expand_builtin_printf (exp, target, mode, false);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_PRINTF_UNLOCKED:
+ target = expand_builtin_printf (exp, target, mode, true);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FPUTS:
+ target = expand_builtin_fputs (exp, target, false);
+ if (target)
+ return target;
+ break;
+ case BUILT_IN_FPUTS_UNLOCKED:
+ target = expand_builtin_fputs (exp, target, true);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FPRINTF:
+ target = expand_builtin_fprintf (exp, target, mode, false);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FPRINTF_UNLOCKED:
+ target = expand_builtin_fprintf (exp, target, mode, true);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_SPRINTF:
+ target = expand_builtin_sprintf (exp, target, mode);
+ if (target)
+ return target;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_SIGNBIT):
+ case BUILT_IN_SIGNBITD32:
+ case BUILT_IN_SIGNBITD64:
+ case BUILT_IN_SIGNBITD128:
+ target = expand_builtin_signbit (exp, target);
+ if (target)
+ return target;
+ break;
+
+ /* Various hooks for the DWARF 2 __throw routine. */
+ case BUILT_IN_UNWIND_INIT:
+ expand_builtin_unwind_init ();
+ return const0_rtx;
+ case BUILT_IN_DWARF_CFA:
+ return virtual_cfa_rtx;
+#ifdef DWARF2_UNWIND_INFO
+ case BUILT_IN_DWARF_SP_COLUMN:
+ return expand_builtin_dwarf_sp_column ();
+ case BUILT_IN_INIT_DWARF_REG_SIZES:
+ expand_builtin_init_dwarf_reg_sizes (CALL_EXPR_ARG (exp, 0));
+ return const0_rtx;
+#endif
+ case BUILT_IN_FROB_RETURN_ADDR:
+ return expand_builtin_frob_return_addr (CALL_EXPR_ARG (exp, 0));
+ case BUILT_IN_EXTRACT_RETURN_ADDR:
+ return expand_builtin_extract_return_addr (CALL_EXPR_ARG (exp, 0));
+ case BUILT_IN_EH_RETURN:
+ expand_builtin_eh_return (CALL_EXPR_ARG (exp, 0),
+ CALL_EXPR_ARG (exp, 1));
+ return const0_rtx;
+#ifdef EH_RETURN_DATA_REGNO
+ case BUILT_IN_EH_RETURN_DATA_REGNO:
+ return expand_builtin_eh_return_data_regno (exp);
+#endif
+ case BUILT_IN_EXTEND_POINTER:
+ return expand_builtin_extend_pointer (CALL_EXPR_ARG (exp, 0));
+
+ case BUILT_IN_VA_START:
+ return expand_builtin_va_start (exp);
+ case BUILT_IN_VA_END:
+ return expand_builtin_va_end (exp);
+ case BUILT_IN_VA_COPY:
+ return expand_builtin_va_copy (exp);
+ case BUILT_IN_EXPECT:
+ return expand_builtin_expect (exp, target);
+ case BUILT_IN_PREFETCH:
+ expand_builtin_prefetch (exp);
+ return const0_rtx;
+
+ case BUILT_IN_PROFILE_FUNC_ENTER:
+ return expand_builtin_profile_func (false);
+ case BUILT_IN_PROFILE_FUNC_EXIT:
+ return expand_builtin_profile_func (true);
+
+ case BUILT_IN_INIT_TRAMPOLINE:
+ return expand_builtin_init_trampoline (exp);
+ case BUILT_IN_ADJUST_TRAMPOLINE:
+ return expand_builtin_adjust_trampoline (exp);
+
+ case BUILT_IN_FORK:
+ case BUILT_IN_EXECL:
+ case BUILT_IN_EXECV:
+ case BUILT_IN_EXECLP:
+ case BUILT_IN_EXECLE:
+ case BUILT_IN_EXECVP:
+ case BUILT_IN_EXECVE:
+ target = expand_builtin_fork_or_exec (fndecl, exp, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_ADD_1:
+ case BUILT_IN_FETCH_AND_ADD_2:
+ case BUILT_IN_FETCH_AND_ADD_4:
+ case BUILT_IN_FETCH_AND_ADD_8:
+ case BUILT_IN_FETCH_AND_ADD_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_ADD_1);
+ target = expand_builtin_sync_operation (mode, exp, PLUS,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_SUB_1:
+ case BUILT_IN_FETCH_AND_SUB_2:
+ case BUILT_IN_FETCH_AND_SUB_4:
+ case BUILT_IN_FETCH_AND_SUB_8:
+ case BUILT_IN_FETCH_AND_SUB_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_SUB_1);
+ target = expand_builtin_sync_operation (mode, exp, MINUS,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_OR_1:
+ case BUILT_IN_FETCH_AND_OR_2:
+ case BUILT_IN_FETCH_AND_OR_4:
+ case BUILT_IN_FETCH_AND_OR_8:
+ case BUILT_IN_FETCH_AND_OR_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_OR_1);
+ target = expand_builtin_sync_operation (mode, exp, IOR,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_AND_1:
+ case BUILT_IN_FETCH_AND_AND_2:
+ case BUILT_IN_FETCH_AND_AND_4:
+ case BUILT_IN_FETCH_AND_AND_8:
+ case BUILT_IN_FETCH_AND_AND_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_AND_1);
+ target = expand_builtin_sync_operation (mode, exp, AND,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_XOR_1:
+ case BUILT_IN_FETCH_AND_XOR_2:
+ case BUILT_IN_FETCH_AND_XOR_4:
+ case BUILT_IN_FETCH_AND_XOR_8:
+ case BUILT_IN_FETCH_AND_XOR_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_XOR_1);
+ target = expand_builtin_sync_operation (mode, exp, XOR,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_FETCH_AND_NAND_1:
+ case BUILT_IN_FETCH_AND_NAND_2:
+ case BUILT_IN_FETCH_AND_NAND_4:
+ case BUILT_IN_FETCH_AND_NAND_8:
+ case BUILT_IN_FETCH_AND_NAND_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_FETCH_AND_NAND_1);
+ target = expand_builtin_sync_operation (mode, exp, NOT,
+ false, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_ADD_AND_FETCH_1:
+ case BUILT_IN_ADD_AND_FETCH_2:
+ case BUILT_IN_ADD_AND_FETCH_4:
+ case BUILT_IN_ADD_AND_FETCH_8:
+ case BUILT_IN_ADD_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_ADD_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, PLUS,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_SUB_AND_FETCH_1:
+ case BUILT_IN_SUB_AND_FETCH_2:
+ case BUILT_IN_SUB_AND_FETCH_4:
+ case BUILT_IN_SUB_AND_FETCH_8:
+ case BUILT_IN_SUB_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_SUB_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, MINUS,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_OR_AND_FETCH_1:
+ case BUILT_IN_OR_AND_FETCH_2:
+ case BUILT_IN_OR_AND_FETCH_4:
+ case BUILT_IN_OR_AND_FETCH_8:
+ case BUILT_IN_OR_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_OR_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, IOR,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_AND_AND_FETCH_1:
+ case BUILT_IN_AND_AND_FETCH_2:
+ case BUILT_IN_AND_AND_FETCH_4:
+ case BUILT_IN_AND_AND_FETCH_8:
+ case BUILT_IN_AND_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_AND_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, AND,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_XOR_AND_FETCH_1:
+ case BUILT_IN_XOR_AND_FETCH_2:
+ case BUILT_IN_XOR_AND_FETCH_4:
+ case BUILT_IN_XOR_AND_FETCH_8:
+ case BUILT_IN_XOR_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_XOR_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, XOR,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_NAND_AND_FETCH_1:
+ case BUILT_IN_NAND_AND_FETCH_2:
+ case BUILT_IN_NAND_AND_FETCH_4:
+ case BUILT_IN_NAND_AND_FETCH_8:
+ case BUILT_IN_NAND_AND_FETCH_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_NAND_AND_FETCH_1);
+ target = expand_builtin_sync_operation (mode, exp, NOT,
+ true, target, ignore);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_BOOL_COMPARE_AND_SWAP_1:
+ case BUILT_IN_BOOL_COMPARE_AND_SWAP_2:
+ case BUILT_IN_BOOL_COMPARE_AND_SWAP_4:
+ case BUILT_IN_BOOL_COMPARE_AND_SWAP_8:
+ case BUILT_IN_BOOL_COMPARE_AND_SWAP_16:
+ if (mode == VOIDmode)
+ mode = TYPE_MODE (boolean_type_node);
+ if (!target || !register_operand (target, mode))
+ target = gen_reg_rtx (mode);
+
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_BOOL_COMPARE_AND_SWAP_1);
+ target = expand_builtin_compare_and_swap (mode, exp, true, target);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_VAL_COMPARE_AND_SWAP_1:
+ case BUILT_IN_VAL_COMPARE_AND_SWAP_2:
+ case BUILT_IN_VAL_COMPARE_AND_SWAP_4:
+ case BUILT_IN_VAL_COMPARE_AND_SWAP_8:
+ case BUILT_IN_VAL_COMPARE_AND_SWAP_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_VAL_COMPARE_AND_SWAP_1);
+ target = expand_builtin_compare_and_swap (mode, exp, false, target);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_LOCK_TEST_AND_SET_1:
+ case BUILT_IN_LOCK_TEST_AND_SET_2:
+ case BUILT_IN_LOCK_TEST_AND_SET_4:
+ case BUILT_IN_LOCK_TEST_AND_SET_8:
+ case BUILT_IN_LOCK_TEST_AND_SET_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_LOCK_TEST_AND_SET_1);
+ target = expand_builtin_lock_test_and_set (mode, exp, target);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_LOCK_RELEASE_1:
+ case BUILT_IN_LOCK_RELEASE_2:
+ case BUILT_IN_LOCK_RELEASE_4:
+ case BUILT_IN_LOCK_RELEASE_8:
+ case BUILT_IN_LOCK_RELEASE_16:
+ mode = get_builtin_sync_mode (fcode - BUILT_IN_LOCK_RELEASE_1);
+ expand_builtin_lock_release (mode, exp);
+ return const0_rtx;
+
+ case BUILT_IN_SYNCHRONIZE:
+ expand_builtin_synchronize ();
+ return const0_rtx;
+
+ case BUILT_IN_OBJECT_SIZE:
+ return expand_builtin_object_size (exp);
+
+ case BUILT_IN_MEMCPY_CHK:
+ case BUILT_IN_MEMPCPY_CHK:
+ case BUILT_IN_MEMMOVE_CHK:
+ case BUILT_IN_MEMSET_CHK:
+ target = expand_builtin_memory_chk (exp, target, mode, fcode);
+ if (target)
+ return target;
+ break;
+
+ case BUILT_IN_STRCPY_CHK:
+ case BUILT_IN_STPCPY_CHK:
+ case BUILT_IN_STRNCPY_CHK:
+ case BUILT_IN_STRCAT_CHK:
+ case BUILT_IN_STRNCAT_CHK:
+ case BUILT_IN_SNPRINTF_CHK:
+ case BUILT_IN_VSNPRINTF_CHK:
+ maybe_emit_chk_warning (exp, fcode);
+ break;
+
+ case BUILT_IN_SPRINTF_CHK:
+ case BUILT_IN_VSPRINTF_CHK:
+ maybe_emit_sprintf_chk_warning (exp, fcode);
+ break;
+
+ case BUILT_IN_FREE:
+ maybe_emit_free_warning (exp);
+ break;
+
+ default: /* just do library call, if unknown builtin */
+ break;
+ }
+
+ /* The switch statement above can drop through to cause the function
+ to be called normally. */
+ return expand_call (exp, target, ignore);
+}
+
+/* Determine whether a tree node represents a call to a built-in
+ function. If the tree T is a call to a built-in function with
+ the right number of arguments of the appropriate types, return
+ the DECL_FUNCTION_CODE of the call, e.g. BUILT_IN_SQRT.
+ Otherwise the return value is END_BUILTINS. */
+
+enum built_in_function
+builtin_mathfn_code (const_tree t)
+{
+ const_tree fndecl, arg, parmlist;
+ const_tree argtype, parmtype;
+ const_call_expr_arg_iterator iter;
+
+ if (TREE_CODE (t) != CALL_EXPR
+ || TREE_CODE (CALL_EXPR_FN (t)) != ADDR_EXPR)
+ return END_BUILTINS;
+
+ fndecl = get_callee_fndecl (t);
+ if (fndecl == NULL_TREE
+ || TREE_CODE (fndecl) != FUNCTION_DECL
+ || ! DECL_BUILT_IN (fndecl)
+ || DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ return END_BUILTINS;
+
+ parmlist = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
+ init_const_call_expr_arg_iterator (t, &iter);
+ for (; parmlist; parmlist = TREE_CHAIN (parmlist))
+ {
+ /* If a function doesn't take a variable number of arguments,
+ the last element in the list will have type `void'. */
+ parmtype = TREE_VALUE (parmlist);
+ if (VOID_TYPE_P (parmtype))
+ {
+ if (more_const_call_expr_args_p (&iter))
+ return END_BUILTINS;
+ return DECL_FUNCTION_CODE (fndecl);
+ }
+
+ if (! more_const_call_expr_args_p (&iter))
+ return END_BUILTINS;
+
+ arg = next_const_call_expr_arg (&iter);
+ argtype = TREE_TYPE (arg);
+
+ if (SCALAR_FLOAT_TYPE_P (parmtype))
+ {
+ if (! SCALAR_FLOAT_TYPE_P (argtype))
+ return END_BUILTINS;
+ }
+ else if (COMPLEX_FLOAT_TYPE_P (parmtype))
+ {
+ if (! COMPLEX_FLOAT_TYPE_P (argtype))
+ return END_BUILTINS;
+ }
+ else if (POINTER_TYPE_P (parmtype))
+ {
+ if (! POINTER_TYPE_P (argtype))
+ return END_BUILTINS;
+ }
+ else if (INTEGRAL_TYPE_P (parmtype))
+ {
+ if (! INTEGRAL_TYPE_P (argtype))
+ return END_BUILTINS;
+ }
+ else
+ return END_BUILTINS;
+ }
+
+ /* Variable-length argument list. */
+ return DECL_FUNCTION_CODE (fndecl);
+}
+
+/* Fold a call to __builtin_constant_p, if we know its argument ARG will
+ evaluate to a constant. */
+
+static tree
+fold_builtin_constant_p (tree arg)
+{
+ /* We return 1 for a numeric type that's known to be a constant
+ value at compile-time or for an aggregate type that's a
+ literal constant. */
+ STRIP_NOPS (arg);
+
+ /* If we know this is a constant, emit the constant of one. */
+ if (CONSTANT_CLASS_P (arg)
+ || (TREE_CODE (arg) == CONSTRUCTOR
+ && TREE_CONSTANT (arg)))
+ return integer_one_node;
+ if (TREE_CODE (arg) == ADDR_EXPR)
+ {
+ tree op = TREE_OPERAND (arg, 0);
+ if (TREE_CODE (op) == STRING_CST
+ || (TREE_CODE (op) == ARRAY_REF
+ && integer_zerop (TREE_OPERAND (op, 1))
+ && TREE_CODE (TREE_OPERAND (op, 0)) == STRING_CST))
+ return integer_one_node;
+ }
+
+ /* If this expression has side effects, show we don't know it to be a
+ constant. Likewise if it's a pointer or aggregate type since in
+ those case we only want literals, since those are only optimized
+ when generating RTL, not later.
+ And finally, if we are compiling an initializer, not code, we
+ need to return a definite result now; there's not going to be any
+ more optimization done. */
+ if (TREE_SIDE_EFFECTS (arg)
+ || AGGREGATE_TYPE_P (TREE_TYPE (arg))
+ || POINTER_TYPE_P (TREE_TYPE (arg))
+ || cfun == 0
+ || folding_initializer)
+ return integer_zero_node;
+
+ return NULL_TREE;
+}
+
+/* Create builtin_expect with PRED and EXPECTED as its arguments and
+ return it as a truthvalue. */
+
+static tree
+build_builtin_expect_predicate (tree pred, tree expected)
+{
+ tree fn, arg_types, pred_type, expected_type, call_expr, ret_type;
+
+ fn = built_in_decls[BUILT_IN_EXPECT];
+ arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
+ ret_type = TREE_TYPE (TREE_TYPE (fn));
+ pred_type = TREE_VALUE (arg_types);
+ expected_type = TREE_VALUE (TREE_CHAIN (arg_types));
+
+ pred = fold_convert (pred_type, pred);
+ expected = fold_convert (expected_type, expected);
+ call_expr = build_call_expr (fn, 2, pred, expected);
+
+ return build2 (NE_EXPR, TREE_TYPE (pred), call_expr,
+ build_int_cst (ret_type, 0));
+}
+
+/* Fold a call to builtin_expect with arguments ARG0 and ARG1. Return
+ NULL_TREE if no simplification is possible. */
+
+static tree
+fold_builtin_expect (tree arg0, tree arg1)
+{
+ tree inner, fndecl;
+ enum tree_code code;
+
+ /* If this is a builtin_expect within a builtin_expect keep the
+ inner one. See through a comparison against a constant. It
+ might have been added to create a thruthvalue. */
+ inner = arg0;
+ if (COMPARISON_CLASS_P (inner)
+ && TREE_CODE (TREE_OPERAND (inner, 1)) == INTEGER_CST)
+ inner = TREE_OPERAND (inner, 0);
+
+ if (TREE_CODE (inner) == CALL_EXPR
+ && (fndecl = get_callee_fndecl (inner))
+ && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL
+ && DECL_FUNCTION_CODE (fndecl) == BUILT_IN_EXPECT)
+ return arg0;
+
+ /* Distribute the expected value over short-circuiting operators.
+ See through the cast from truthvalue_type_node to long. */
+ inner = arg0;
+ while (TREE_CODE (inner) == NOP_EXPR
+ && INTEGRAL_TYPE_P (TREE_TYPE (inner))
+ && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (inner, 0))))
+ inner = TREE_OPERAND (inner, 0);
+
+ code = TREE_CODE (inner);
+ if (code == TRUTH_ANDIF_EXPR || code == TRUTH_ORIF_EXPR)
+ {
+ tree op0 = TREE_OPERAND (inner, 0);
+ tree op1 = TREE_OPERAND (inner, 1);
+
+ op0 = build_builtin_expect_predicate (op0, arg1);
+ op1 = build_builtin_expect_predicate (op1, arg1);
+ inner = build2 (code, TREE_TYPE (inner), op0, op1);
+
+ return fold_convert (TREE_TYPE (arg0), inner);
+ }
+
+ /* If the argument isn't invariant then there's nothing else we can do. */
+ if (!TREE_CONSTANT (arg0))
+ return NULL_TREE;
+
+ /* If we expect that a comparison against the argument will fold to
+ a constant return the constant. In practice, this means a true
+ constant or the address of a non-weak symbol. */
+ inner = arg0;
+ STRIP_NOPS (inner);
+ if (TREE_CODE (inner) == ADDR_EXPR)
+ {
+ do
+ {
+ inner = TREE_OPERAND (inner, 0);
+ }
+ while (TREE_CODE (inner) == COMPONENT_REF
+ || TREE_CODE (inner) == ARRAY_REF);
+ if ((TREE_CODE (inner) == VAR_DECL
+ || TREE_CODE (inner) == FUNCTION_DECL)
+ && DECL_WEAK (inner))
+ return NULL_TREE;
+ }
+
+ /* Otherwise, ARG0 already has the proper type for the return value. */
+ return arg0;
+}
+
+/* Fold a call to __builtin_classify_type with argument ARG. */
+
+static tree
+fold_builtin_classify_type (tree arg)
+{
+ if (arg == 0)
+ return build_int_cst (NULL_TREE, no_type_class);
+
+ return build_int_cst (NULL_TREE, type_to_class (TREE_TYPE (arg)));
+}
+
+/* Fold a call to __builtin_strlen with argument ARG. */
+
+static tree
+fold_builtin_strlen (tree type, tree arg)
+{
+ if (!validate_arg (arg, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ tree len = c_strlen (arg, 0);
+
+ if (len)
+ return fold_convert (type, len);
+
+ return NULL_TREE;
+ }
+}
+
+/* Fold a call to __builtin_inf or __builtin_huge_val. */
+
+static tree
+fold_builtin_inf (tree type, int warn)
+{
+ REAL_VALUE_TYPE real;
+
+ /* __builtin_inff is intended to be usable to define INFINITY on all
+ targets. If an infinity is not available, INFINITY expands "to a
+ positive constant of type float that overflows at translation
+ time", footnote "In this case, using INFINITY will violate the
+ constraint in 6.4.4 and thus require a diagnostic." (C99 7.12#4).
+ Thus we pedwarn to ensure this constraint violation is
+ diagnosed. */
+ if (!MODE_HAS_INFINITIES (TYPE_MODE (type)) && warn)
+ pedwarn (input_location, 0, "target format does not support infinity");
+
+ real_inf (&real);
+ return build_real (type, real);
+}
+
+/* Fold a call to __builtin_nan or __builtin_nans with argument ARG. */
+
+static tree
+fold_builtin_nan (tree arg, tree type, int quiet)
+{
+ REAL_VALUE_TYPE real;
+ const char *str;
+
+ if (!validate_arg (arg, POINTER_TYPE))
+ return NULL_TREE;
+ str = c_getstr (arg);
+ if (!str)
+ return NULL_TREE;
+
+ if (!real_nan (&real, str, quiet, TYPE_MODE (type)))
+ return NULL_TREE;
+
+ return build_real (type, real);
+}
+
+/* Return true if the floating point expression T has an integer value.
+ We also allow +Inf, -Inf and NaN to be considered integer values. */
+
+static bool
+integer_valued_real_p (tree t)
+{
+ switch (TREE_CODE (t))
+ {
+ case FLOAT_EXPR:
+ return true;
+
+ case ABS_EXPR:
+ case SAVE_EXPR:
+ return integer_valued_real_p (TREE_OPERAND (t, 0));
+
+ case COMPOUND_EXPR:
+ case MODIFY_EXPR:
+ case BIND_EXPR:
+ return integer_valued_real_p (TREE_OPERAND (t, 1));
+
+ case PLUS_EXPR:
+ case MINUS_EXPR:
+ case MULT_EXPR:
+ case MIN_EXPR:
+ case MAX_EXPR:
+ return integer_valued_real_p (TREE_OPERAND (t, 0))
+ && integer_valued_real_p (TREE_OPERAND (t, 1));
+
+ case COND_EXPR:
+ return integer_valued_real_p (TREE_OPERAND (t, 1))
+ && integer_valued_real_p (TREE_OPERAND (t, 2));
+
+ case REAL_CST:
+ return real_isinteger (TREE_REAL_CST_PTR (t), TYPE_MODE (TREE_TYPE (t)));
+
+ case NOP_EXPR:
+ {
+ tree type = TREE_TYPE (TREE_OPERAND (t, 0));
+ if (TREE_CODE (type) == INTEGER_TYPE)
+ return true;
+ if (TREE_CODE (type) == REAL_TYPE)
+ return integer_valued_real_p (TREE_OPERAND (t, 0));
+ break;
+ }
+
+ case CALL_EXPR:
+ switch (builtin_mathfn_code (t))
+ {
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ CASE_FLT_FN (BUILT_IN_RINT):
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ return true;
+
+ CASE_FLT_FN (BUILT_IN_FMIN):
+ CASE_FLT_FN (BUILT_IN_FMAX):
+ return integer_valued_real_p (CALL_EXPR_ARG (t, 0))
+ && integer_valued_real_p (CALL_EXPR_ARG (t, 1));
+
+ default:
+ break;
+ }
+ break;
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* FNDECL is assumed to be a builtin where truncation can be propagated
+ across (for instance floor((double)f) == (double)floorf (f).
+ Do the transformation for a call with argument ARG. */
+
+static tree
+fold_trunc_transparent_mathfn (tree fndecl, tree arg)
+{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Integer rounding functions are idempotent. */
+ if (fcode == builtin_mathfn_code (arg))
+ return arg;
+
+ /* If argument is already integer valued, and we don't need to worry
+ about setting errno, there's no need to perform rounding. */
+ if (! flag_errno_math && integer_valued_real_p (arg))
+ return arg;
+
+ if (optimize)
+ {
+ tree arg0 = strip_float_extensions (arg);
+ tree ftype = TREE_TYPE (TREE_TYPE (fndecl));
+ tree newtype = TREE_TYPE (arg0);
+ tree decl;
+
+ if (TYPE_PRECISION (newtype) < TYPE_PRECISION (ftype)
+ && (decl = mathfn_built_in (newtype, fcode)))
+ return fold_convert (ftype,
+ build_call_expr (decl, 1,
+ fold_convert (newtype, arg0)));
+ }
+ return NULL_TREE;
+}
+
+/* FNDECL is assumed to be builtin which can narrow the FP type of
+ the argument, for instance lround((double)f) -> lroundf (f).
+ Do the transformation for a call with argument ARG. */
+
+static tree
+fold_fixed_mathfn (tree fndecl, tree arg)
+{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* If argument is already integer valued, and we don't need to worry
+ about setting errno, there's no need to perform rounding. */
+ if (! flag_errno_math && integer_valued_real_p (arg))
+ return fold_build1 (FIX_TRUNC_EXPR, TREE_TYPE (TREE_TYPE (fndecl)), arg);
+
+ if (optimize)
+ {
+ tree ftype = TREE_TYPE (arg);
+ tree arg0 = strip_float_extensions (arg);
+ tree newtype = TREE_TYPE (arg0);
+ tree decl;
+
+ if (TYPE_PRECISION (newtype) < TYPE_PRECISION (ftype)
+ && (decl = mathfn_built_in (newtype, fcode)))
+ return build_call_expr (decl, 1, fold_convert (newtype, arg0));
+ }
+
+ /* Canonicalize llround (x) to lround (x) on LP64 targets where
+ sizeof (long long) == sizeof (long). */
+ if (TYPE_PRECISION (long_long_integer_type_node)
+ == TYPE_PRECISION (long_integer_type_node))
+ {
+ tree newfn = NULL_TREE;
+ switch (fcode)
+ {
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ newfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_LCEIL);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ newfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_LFLOOR);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ newfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_LROUND);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LLRINT):
+ newfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_LRINT);
+ break;
+
+ default:
+ break;
+ }
+
+ if (newfn)
+ {
+ tree newcall = build_call_expr(newfn, 1, arg);
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), newcall);
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold call to builtin cabs, cabsf or cabsl with argument ARG. TYPE is the
+ return type. Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_cabs (tree arg, tree type, tree fndecl)
+{
+ tree res;
+
+ if (TREE_CODE (TREE_TYPE (arg)) != COMPLEX_TYPE
+ || TREE_CODE (TREE_TYPE (TREE_TYPE (arg))) != REAL_TYPE)
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if (TREE_CODE (arg) == COMPLEX_CST
+ && (res = do_mpfr_arg2 (TREE_REALPART (arg), TREE_IMAGPART (arg),
+ type, mpfr_hypot)))
+ return res;
+
+ if (TREE_CODE (arg) == COMPLEX_EXPR)
+ {
+ tree real = TREE_OPERAND (arg, 0);
+ tree imag = TREE_OPERAND (arg, 1);
+
+ /* If either part is zero, cabs is fabs of the other. */
+ if (real_zerop (real))
+ return fold_build1 (ABS_EXPR, type, imag);
+ if (real_zerop (imag))
+ return fold_build1 (ABS_EXPR, type, real);
+
+ /* cabs(x+xi) -> fabs(x)*sqrt(2). */
+ if (flag_unsafe_math_optimizations
+ && operand_equal_p (real, imag, OEP_PURE_SAME))
+ {
+ const REAL_VALUE_TYPE sqrt2_trunc
+ = real_value_truncate (TYPE_MODE (type), dconst_sqrt2 ());
+ STRIP_NOPS (real);
+ return fold_build2 (MULT_EXPR, type,
+ fold_build1 (ABS_EXPR, type, real),
+ build_real (type, sqrt2_trunc));
+ }
+ }
+
+ /* Optimize cabs(-z) and cabs(conj(z)) as cabs(z). */
+ if (TREE_CODE (arg) == NEGATE_EXPR
+ || TREE_CODE (arg) == CONJ_EXPR)
+ return build_call_expr (fndecl, 1, TREE_OPERAND (arg, 0));
+
+ /* Don't do this when optimizing for size. */
+ if (flag_unsafe_math_optimizations
+ && optimize && optimize_function_for_speed_p (cfun))
+ {
+ tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
+
+ if (sqrtfn != NULL_TREE)
+ {
+ tree rpart, ipart, result;
+
+ arg = builtin_save_expr (arg);
+
+ rpart = fold_build1 (REALPART_EXPR, type, arg);
+ ipart = fold_build1 (IMAGPART_EXPR, type, arg);
+
+ rpart = builtin_save_expr (rpart);
+ ipart = builtin_save_expr (ipart);
+
+ result = fold_build2 (PLUS_EXPR, type,
+ fold_build2 (MULT_EXPR, type,
+ rpart, rpart),
+ fold_build2 (MULT_EXPR, type,
+ ipart, ipart));
+
+ return build_call_expr (sqrtfn, 1, result);
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a builtin function call to sqrt, sqrtf, or sqrtl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_sqrt (tree arg, tree type)
+{
+
+ enum built_in_function fcode;
+ tree res;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, mpfr_sqrt, &dconst0, NULL, true)))
+ return res;
+
+ /* Optimize sqrt(expN(x)) = expN(x*0.5). */
+ fcode = builtin_mathfn_code (arg);
+ if (flag_unsafe_math_optimizations && BUILTIN_EXPONENT_P (fcode))
+ {
+ tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
+ arg = fold_build2 (MULT_EXPR, type,
+ CALL_EXPR_ARG (arg, 0),
+ build_real (type, dconsthalf));
+ return build_call_expr (expfn, 1, arg);
+ }
+
+ /* Optimize sqrt(Nroot(x)) -> pow(x,1/(2*N)). */
+ if (flag_unsafe_math_optimizations && BUILTIN_ROOT_P (fcode))
+ {
+ tree powfn = mathfn_built_in (type, BUILT_IN_POW);
+
+ if (powfn)
+ {
+ tree arg0 = CALL_EXPR_ARG (arg, 0);
+ tree tree_root;
+ /* The inner root was either sqrt or cbrt. */
+ /* This was a conditional expression but it triggered a bug
+ in Sun C 5.5. */
+ REAL_VALUE_TYPE dconstroot;
+ if (BUILTIN_SQRT_P (fcode))
+ dconstroot = dconsthalf;
+ else
+ dconstroot = dconst_third ();
+
+ /* Adjust for the outer root. */
+ SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
+ dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
+ tree_root = build_real (type, dconstroot);
+ return build_call_expr (powfn, 2, arg0, tree_root);
+ }
+ }
+
+ /* Optimize sqrt(pow(x,y)) = pow(|x|,y*0.5). */
+ if (flag_unsafe_math_optimizations
+ && (fcode == BUILT_IN_POW
+ || fcode == BUILT_IN_POWF
+ || fcode == BUILT_IN_POWL))
+ {
+ tree powfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
+ tree arg0 = CALL_EXPR_ARG (arg, 0);
+ tree arg1 = CALL_EXPR_ARG (arg, 1);
+ tree narg1;
+ if (!tree_expr_nonnegative_p (arg0))
+ arg0 = build1 (ABS_EXPR, type, arg0);
+ narg1 = fold_build2 (MULT_EXPR, type, arg1,
+ build_real (type, dconsthalf));
+ return build_call_expr (powfn, 2, arg0, narg1);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a builtin function call to cbrt, cbrtf, or cbrtl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_cbrt (tree arg, tree type)
+{
+ const enum built_in_function fcode = builtin_mathfn_code (arg);
+ tree res;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, mpfr_cbrt, NULL, NULL, 0)))
+ return res;
+
+ if (flag_unsafe_math_optimizations)
+ {
+ /* Optimize cbrt(expN(x)) -> expN(x/3). */
+ if (BUILTIN_EXPONENT_P (fcode))
+ {
+ tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
+ const REAL_VALUE_TYPE third_trunc =
+ real_value_truncate (TYPE_MODE (type), dconst_third ());
+ arg = fold_build2 (MULT_EXPR, type,
+ CALL_EXPR_ARG (arg, 0),
+ build_real (type, third_trunc));
+ return build_call_expr (expfn, 1, arg);
+ }
+
+ /* Optimize cbrt(sqrt(x)) -> pow(x,1/6). */
+ if (BUILTIN_SQRT_P (fcode))
+ {
+ tree powfn = mathfn_built_in (type, BUILT_IN_POW);
+
+ if (powfn)
+ {
+ tree arg0 = CALL_EXPR_ARG (arg, 0);
+ tree tree_root;
+ REAL_VALUE_TYPE dconstroot = dconst_third ();
+
+ SET_REAL_EXP (&dconstroot, REAL_EXP (&dconstroot) - 1);
+ dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
+ tree_root = build_real (type, dconstroot);
+ return build_call_expr (powfn, 2, arg0, tree_root);
+ }
+ }
+
+ /* Optimize cbrt(cbrt(x)) -> pow(x,1/9) iff x is nonnegative. */
+ if (BUILTIN_CBRT_P (fcode))
+ {
+ tree arg0 = CALL_EXPR_ARG (arg, 0);
+ if (tree_expr_nonnegative_p (arg0))
+ {
+ tree powfn = mathfn_built_in (type, BUILT_IN_POW);
+
+ if (powfn)
+ {
+ tree tree_root;
+ REAL_VALUE_TYPE dconstroot;
+
+ real_arithmetic (&dconstroot, MULT_EXPR,
+ dconst_third_ptr (), dconst_third_ptr ());
+ dconstroot = real_value_truncate (TYPE_MODE (type), dconstroot);
+ tree_root = build_real (type, dconstroot);
+ return build_call_expr (powfn, 2, arg0, tree_root);
+ }
+ }
+ }
+
+ /* Optimize cbrt(pow(x,y)) -> pow(x,y/3) iff x is nonnegative. */
+ if (fcode == BUILT_IN_POW
+ || fcode == BUILT_IN_POWF
+ || fcode == BUILT_IN_POWL)
+ {
+ tree arg00 = CALL_EXPR_ARG (arg, 0);
+ tree arg01 = CALL_EXPR_ARG (arg, 1);
+ if (tree_expr_nonnegative_p (arg00))
+ {
+ tree powfn = TREE_OPERAND (CALL_EXPR_FN (arg), 0);
+ const REAL_VALUE_TYPE dconstroot
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
+ tree narg01 = fold_build2 (MULT_EXPR, type, arg01,
+ build_real (type, dconstroot));
+ return build_call_expr (powfn, 2, arg00, narg01);
+ }
+ }
+ }
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin cos, cosf, or cosl with argument ARG.
+ TYPE is the type of the return value. Return NULL_TREE if no
+ simplification can be made. */
+
+static tree
+fold_builtin_cos (tree arg, tree type, tree fndecl)
+{
+ tree res, narg;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, mpfr_cos, NULL, NULL, 0)))
+ return res;
+
+ /* Optimize cos(-x) into cos (x). */
+ if ((narg = fold_strip_sign_ops (arg)))
+ return build_call_expr (fndecl, 1, narg);
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin cosh, coshf, or coshl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_cosh (tree arg, tree type, tree fndecl)
+{
+ if (validate_arg (arg, REAL_TYPE))
+ {
+ tree res, narg;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, mpfr_cosh, NULL, NULL, 0)))
+ return res;
+
+ /* Optimize cosh(-x) into cosh (x). */
+ if ((narg = fold_strip_sign_ops (arg)))
+ return build_call_expr (fndecl, 1, narg);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin tan, tanf, or tanl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_tan (tree arg, tree type)
+{
+ enum built_in_function fcode;
+ tree res;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, mpfr_tan, NULL, NULL, 0)))
+ return res;
+
+ /* Optimize tan(atan(x)) = x. */
+ fcode = builtin_mathfn_code (arg);
+ if (flag_unsafe_math_optimizations
+ && (fcode == BUILT_IN_ATAN
+ || fcode == BUILT_IN_ATANF
+ || fcode == BUILT_IN_ATANL))
+ return CALL_EXPR_ARG (arg, 0);
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin sincos, sincosf, or sincosl. Return
+ NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_sincos (tree arg0, tree arg1, tree arg2)
+{
+ tree type;
+ tree res, fn, call;
+
+ if (!validate_arg (arg0, REAL_TYPE)
+ || !validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, POINTER_TYPE))
+ return NULL_TREE;
+
+ type = TREE_TYPE (arg0);
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_sincos (arg0, arg1, arg2)))
+ return res;
+
+ /* Canonicalize sincos to cexpi. */
+ if (!TARGET_C99_FUNCTIONS)
+ return NULL_TREE;
+ fn = mathfn_built_in (type, BUILT_IN_CEXPI);
+ if (!fn)
+ return NULL_TREE;
+
+ call = build_call_expr (fn, 1, arg0);
+ call = builtin_save_expr (call);
+
+ return build2 (COMPOUND_EXPR, type,
+ build2 (MODIFY_EXPR, void_type_node,
+ build_fold_indirect_ref (arg1),
+ build1 (IMAGPART_EXPR, type, call)),
+ build2 (MODIFY_EXPR, void_type_node,
+ build_fold_indirect_ref (arg2),
+ build1 (REALPART_EXPR, type, call)));
+}
+
+/* Fold function call to builtin cexp, cexpf, or cexpl. Return
+ NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_cexp (tree arg0, tree type)
+{
+ tree rtype;
+ tree realp, imagp, ifn;
+
+ if (!validate_arg (arg0, COMPLEX_TYPE))
+ return NULL_TREE;
+
+ rtype = TREE_TYPE (TREE_TYPE (arg0));
+
+ /* In case we can figure out the real part of arg0 and it is constant zero
+ fold to cexpi. */
+ if (!TARGET_C99_FUNCTIONS)
+ return NULL_TREE;
+ ifn = mathfn_built_in (rtype, BUILT_IN_CEXPI);
+ if (!ifn)
+ return NULL_TREE;
+
+ if ((realp = fold_unary (REALPART_EXPR, rtype, arg0))
+ && real_zerop (realp))
+ {
+ tree narg = fold_build1 (IMAGPART_EXPR, rtype, arg0);
+ return build_call_expr (ifn, 1, narg);
+ }
+
+ /* In case we can easily decompose real and imaginary parts split cexp
+ to exp (r) * cexpi (i). */
+ if (flag_unsafe_math_optimizations
+ && realp)
+ {
+ tree rfn, rcall, icall;
+
+ rfn = mathfn_built_in (rtype, BUILT_IN_EXP);
+ if (!rfn)
+ return NULL_TREE;
+
+ imagp = fold_unary (IMAGPART_EXPR, rtype, arg0);
+ if (!imagp)
+ return NULL_TREE;
+
+ icall = build_call_expr (ifn, 1, imagp);
+ icall = builtin_save_expr (icall);
+ rcall = build_call_expr (rfn, 1, realp);
+ rcall = builtin_save_expr (rcall);
+ return fold_build2 (COMPLEX_EXPR, type,
+ fold_build2 (MULT_EXPR, rtype,
+ rcall,
+ fold_build1 (REALPART_EXPR, rtype, icall)),
+ fold_build2 (MULT_EXPR, rtype,
+ rcall,
+ fold_build1 (IMAGPART_EXPR, rtype, icall)));
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin trunc, truncf or truncl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_trunc (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Optimize trunc of constant value. */
+ if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ REAL_VALUE_TYPE r, x;
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+
+ x = TREE_REAL_CST (arg);
+ real_trunc (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+
+ return fold_trunc_transparent_mathfn (fndecl, arg);
+}
+
+/* Fold function call to builtin floor, floorf or floorl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_floor (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Optimize floor of constant value. */
+ if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ REAL_VALUE_TYPE x;
+
+ x = TREE_REAL_CST (arg);
+ if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+
+ real_floor (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+
+ /* Fold floor (x) where x is nonnegative to trunc (x). */
+ if (tree_expr_nonnegative_p (arg))
+ {
+ tree truncfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_TRUNC);
+ if (truncfn)
+ return build_call_expr (truncfn, 1, arg);
+ }
+
+ return fold_trunc_transparent_mathfn (fndecl, arg);
+}
+
+/* Fold function call to builtin ceil, ceilf or ceill with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_ceil (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Optimize ceil of constant value. */
+ if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ REAL_VALUE_TYPE x;
+
+ x = TREE_REAL_CST (arg);
+ if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+
+ real_ceil (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+
+ return fold_trunc_transparent_mathfn (fndecl, arg);
+}
+
+/* Fold function call to builtin round, roundf or roundl with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_round (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Optimize round of constant value. */
+ if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ REAL_VALUE_TYPE x;
+
+ x = TREE_REAL_CST (arg);
+ if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+
+ real_round (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+
+ return fold_trunc_transparent_mathfn (fndecl, arg);
+}
+
+/* Fold function call to builtin lround, lroundf or lroundl (or the
+ corresponding long long versions) and other rounding functions. ARG
+ is the argument to the call. Return NULL_TREE if no simplification
+ can be made. */
+
+static tree
+fold_builtin_int_roundingfn (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Optimize lround of constant value. */
+ if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE x = TREE_REAL_CST (arg);
+
+ if (real_isfinite (&x))
+ {
+ tree itype = TREE_TYPE (TREE_TYPE (fndecl));
+ tree ftype = TREE_TYPE (arg);
+ unsigned HOST_WIDE_INT lo2;
+ HOST_WIDE_INT hi, lo;
+ REAL_VALUE_TYPE r;
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ real_floor (&r, TYPE_MODE (ftype), &x);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LCEIL):
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ real_ceil (&r, TYPE_MODE (ftype), &x);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LROUND):
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ real_round (&r, TYPE_MODE (ftype), &x);
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ REAL_VALUE_TO_INT (&lo, &hi, r);
+ if (!fit_double_type (lo, hi, &lo2, &hi, itype))
+ return build_int_cst_wide (itype, lo2, hi);
+ }
+ }
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ /* Fold lfloor (x) where x is nonnegative to FIX_TRUNC (x). */
+ if (tree_expr_nonnegative_p (arg))
+ return fold_build1 (FIX_TRUNC_EXPR, TREE_TYPE (TREE_TYPE (fndecl)),
+ arg);
+ break;
+ default:;
+ }
+
+ return fold_fixed_mathfn (fndecl, arg);
+}
+
+/* Fold function call to builtin ffs, clz, ctz, popcount and parity
+ and their long and long long variants (i.e. ffsl and ffsll). ARG is
+ the argument to the call. Return NULL_TREE if no simplification can
+ be made. */
+
+static tree
+fold_builtin_bitop (tree fndecl, tree arg)
+{
+ if (!validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* Optimize for constant argument. */
+ if (TREE_CODE (arg) == INTEGER_CST && !TREE_OVERFLOW (arg))
+ {
+ HOST_WIDE_INT hi, width, result;
+ unsigned HOST_WIDE_INT lo;
+ tree type;
+
+ type = TREE_TYPE (arg);
+ width = TYPE_PRECISION (type);
+ lo = TREE_INT_CST_LOW (arg);
+
+ /* Clear all the bits that are beyond the type's precision. */
+ if (width > HOST_BITS_PER_WIDE_INT)
+ {
+ hi = TREE_INT_CST_HIGH (arg);
+ if (width < 2 * HOST_BITS_PER_WIDE_INT)
+ hi &= ~((HOST_WIDE_INT) (-1) >> (width - HOST_BITS_PER_WIDE_INT));
+ }
+ else
+ {
+ hi = 0;
+ if (width < HOST_BITS_PER_WIDE_INT)
+ lo &= ~((unsigned HOST_WIDE_INT) (-1) << width);
+ }
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_INT_FN (BUILT_IN_FFS):
+ if (lo != 0)
+ result = exact_log2 (lo & -lo) + 1;
+ else if (hi != 0)
+ result = HOST_BITS_PER_WIDE_INT + exact_log2 (hi & -hi) + 1;
+ else
+ result = 0;
+ break;
+
+ CASE_INT_FN (BUILT_IN_CLZ):
+ if (hi != 0)
+ result = width - floor_log2 (hi) - 1 - HOST_BITS_PER_WIDE_INT;
+ else if (lo != 0)
+ result = width - floor_log2 (lo) - 1;
+ else if (! CLZ_DEFINED_VALUE_AT_ZERO (TYPE_MODE (type), result))
+ result = width;
+ break;
+
+ CASE_INT_FN (BUILT_IN_CTZ):
+ if (lo != 0)
+ result = exact_log2 (lo & -lo);
+ else if (hi != 0)
+ result = HOST_BITS_PER_WIDE_INT + exact_log2 (hi & -hi);
+ else if (! CTZ_DEFINED_VALUE_AT_ZERO (TYPE_MODE (type), result))
+ result = width;
+ break;
+
+ CASE_INT_FN (BUILT_IN_POPCOUNT):
+ result = 0;
+ while (lo)
+ result++, lo &= lo - 1;
+ while (hi)
+ result++, hi &= hi - 1;
+ break;
+
+ CASE_INT_FN (BUILT_IN_PARITY):
+ result = 0;
+ while (lo)
+ result++, lo &= lo - 1;
+ while (hi)
+ result++, hi &= hi - 1;
+ result &= 1;
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl)), result);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin_bswap and the long and long long
+ variants. Return NULL_TREE if no simplification can be made. */
+static tree
+fold_builtin_bswap (tree fndecl, tree arg)
+{
+ if (! validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* Optimize constant value. */
+ if (TREE_CODE (arg) == INTEGER_CST && !TREE_OVERFLOW (arg))
+ {
+ HOST_WIDE_INT hi, width, r_hi = 0;
+ unsigned HOST_WIDE_INT lo, r_lo = 0;
+ tree type;
+
+ type = TREE_TYPE (arg);
+ width = TYPE_PRECISION (type);
+ lo = TREE_INT_CST_LOW (arg);
+ hi = TREE_INT_CST_HIGH (arg);
+
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ case BUILT_IN_BSWAP32:
+ case BUILT_IN_BSWAP64:
+ {
+ int s;
+
+ for (s = 0; s < width; s += 8)
+ {
+ int d = width - s - 8;
+ unsigned HOST_WIDE_INT byte;
+
+ if (s < HOST_BITS_PER_WIDE_INT)
+ byte = (lo >> s) & 0xff;
+ else
+ byte = (hi >> (s - HOST_BITS_PER_WIDE_INT)) & 0xff;
+
+ if (d < HOST_BITS_PER_WIDE_INT)
+ r_lo |= byte << d;
+ else
+ r_hi |= byte << (d - HOST_BITS_PER_WIDE_INT);
+ }
+ }
+
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ if (width < HOST_BITS_PER_WIDE_INT)
+ return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl)), r_lo);
+ else
+ return build_int_cst_wide (TREE_TYPE (TREE_TYPE (fndecl)), r_lo, r_hi);
+ }
+
+ return NULL_TREE;
+}
+
+/* Return true if EXPR is the real constant contained in VALUE. */
+
+static bool
+real_dconstp (tree expr, const REAL_VALUE_TYPE *value)
+{
+ STRIP_NOPS (expr);
+
+ return ((TREE_CODE (expr) == REAL_CST
+ && !TREE_OVERFLOW (expr)
+ && REAL_VALUES_EQUAL (TREE_REAL_CST (expr), *value))
+ || (TREE_CODE (expr) == COMPLEX_CST
+ && real_dconstp (TREE_REALPART (expr), value)
+ && real_zerop (TREE_IMAGPART (expr))));
+}
+
+/* A subroutine of fold_builtin to fold the various logarithmic
+ functions. Return NULL_TREE if no simplification can me made.
+ FUNC is the corresponding MPFR logarithm function. */
+
+static tree
+fold_builtin_logarithm (tree fndecl, tree arg,
+ int (*func)(mpfr_ptr, mpfr_srcptr, mp_rnd_t))
+{
+ if (validate_arg (arg, REAL_TYPE))
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ tree res;
+ const enum built_in_function fcode = builtin_mathfn_code (arg);
+
+ /* Optimize log(e) = 1.0. We're never passed an exact 'e',
+ instead we'll look for 'e' truncated to MODE. So only do
+ this if flag_unsafe_math_optimizations is set. */
+ if (flag_unsafe_math_optimizations && func == mpfr_log)
+ {
+ const REAL_VALUE_TYPE e_truncated =
+ real_value_truncate (TYPE_MODE (type), dconst_e ());
+ if (real_dconstp (arg, &e_truncated))
+ return build_real (type, dconst1);
+ }
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, func, &dconst0, NULL, false)))
+ return res;
+
+ /* Special case, optimize logN(expN(x)) = x. */
+ if (flag_unsafe_math_optimizations
+ && ((func == mpfr_log
+ && (fcode == BUILT_IN_EXP
+ || fcode == BUILT_IN_EXPF
+ || fcode == BUILT_IN_EXPL))
+ || (func == mpfr_log2
+ && (fcode == BUILT_IN_EXP2
+ || fcode == BUILT_IN_EXP2F
+ || fcode == BUILT_IN_EXP2L))
+ || (func == mpfr_log10 && (BUILTIN_EXP10_P (fcode)))))
+ return fold_convert (type, CALL_EXPR_ARG (arg, 0));
+
+ /* Optimize logN(func()) for various exponential functions. We
+ want to determine the value "x" and the power "exponent" in
+ order to transform logN(x**exponent) into exponent*logN(x). */
+ if (flag_unsafe_math_optimizations)
+ {
+ tree exponent = 0, x = 0;
+
+ switch (fcode)
+ {
+ CASE_FLT_FN (BUILT_IN_EXP):
+ /* Prepare to do logN(exp(exponent) -> exponent*logN(e). */
+ x = build_real (type, real_value_truncate (TYPE_MODE (type),
+ dconst_e ()));
+ exponent = CALL_EXPR_ARG (arg, 0);
+ break;
+ CASE_FLT_FN (BUILT_IN_EXP2):
+ /* Prepare to do logN(exp2(exponent) -> exponent*logN(2). */
+ x = build_real (type, dconst2);
+ exponent = CALL_EXPR_ARG (arg, 0);
+ break;
+ CASE_FLT_FN (BUILT_IN_EXP10):
+ CASE_FLT_FN (BUILT_IN_POW10):
+ /* Prepare to do logN(exp10(exponent) -> exponent*logN(10). */
+ {
+ REAL_VALUE_TYPE dconst10;
+ real_from_integer (&dconst10, VOIDmode, 10, 0, 0);
+ x = build_real (type, dconst10);
+ }
+ exponent = CALL_EXPR_ARG (arg, 0);
+ break;
+ CASE_FLT_FN (BUILT_IN_SQRT):
+ /* Prepare to do logN(sqrt(x) -> 0.5*logN(x). */
+ x = CALL_EXPR_ARG (arg, 0);
+ exponent = build_real (type, dconsthalf);
+ break;
+ CASE_FLT_FN (BUILT_IN_CBRT):
+ /* Prepare to do logN(cbrt(x) -> (1/3)*logN(x). */
+ x = CALL_EXPR_ARG (arg, 0);
+ exponent = build_real (type, real_value_truncate (TYPE_MODE (type),
+ dconst_third ()));
+ break;
+ CASE_FLT_FN (BUILT_IN_POW):
+ /* Prepare to do logN(pow(x,exponent) -> exponent*logN(x). */
+ x = CALL_EXPR_ARG (arg, 0);
+ exponent = CALL_EXPR_ARG (arg, 1);
+ break;
+ default:
+ break;
+ }
+
+ /* Now perform the optimization. */
+ if (x && exponent)
+ {
+ tree logfn = build_call_expr (fndecl, 1, x);
+ return fold_build2 (MULT_EXPR, type, exponent, logfn);
+ }
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a builtin function call to hypot, hypotf, or hypotl. Return
+ NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_hypot (tree fndecl, tree arg0, tree arg1, tree type)
+{
+ tree res, narg0, narg1;
+
+ if (!validate_arg (arg0, REAL_TYPE)
+ || !validate_arg (arg1, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg2 (arg0, arg1, type, mpfr_hypot)))
+ return res;
+
+ /* If either argument to hypot has a negate or abs, strip that off.
+ E.g. hypot(-x,fabs(y)) -> hypot(x,y). */
+ narg0 = fold_strip_sign_ops (arg0);
+ narg1 = fold_strip_sign_ops (arg1);
+ if (narg0 || narg1)
+ {
+ return build_call_expr (fndecl, 2, narg0 ? narg0 : arg0,
+ narg1 ? narg1 : arg1);
+ }
+
+ /* If either argument is zero, hypot is fabs of the other. */
+ if (real_zerop (arg0))
+ return fold_build1 (ABS_EXPR, type, arg1);
+ else if (real_zerop (arg1))
+ return fold_build1 (ABS_EXPR, type, arg0);
+
+ /* hypot(x,x) -> fabs(x)*sqrt(2). */
+ if (flag_unsafe_math_optimizations
+ && operand_equal_p (arg0, arg1, OEP_PURE_SAME))
+ {
+ const REAL_VALUE_TYPE sqrt2_trunc
+ = real_value_truncate (TYPE_MODE (type), dconst_sqrt2 ());
+ return fold_build2 (MULT_EXPR, type,
+ fold_build1 (ABS_EXPR, type, arg0),
+ build_real (type, sqrt2_trunc));
+ }
+
+ return NULL_TREE;
+}
+
+
+/* Fold a builtin function call to pow, powf, or powl. Return
+ NULL_TREE if no simplification can be made. */
+static tree
+fold_builtin_pow (tree fndecl, tree arg0, tree arg1, tree type)
+{
+ tree res;
+
+ if (!validate_arg (arg0, REAL_TYPE)
+ || !validate_arg (arg1, REAL_TYPE))
+ return NULL_TREE;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg2 (arg0, arg1, type, mpfr_pow)))
+ return res;
+
+ /* Optimize pow(1.0,y) = 1.0. */
+ if (real_onep (arg0))
+ return omit_one_operand (type, build_real (type, dconst1), arg1);
+
+ if (TREE_CODE (arg1) == REAL_CST
+ && !TREE_OVERFLOW (arg1))
+ {
+ REAL_VALUE_TYPE cint;
+ REAL_VALUE_TYPE c;
+ HOST_WIDE_INT n;
+
+ c = TREE_REAL_CST (arg1);
+
+ /* Optimize pow(x,0.0) = 1.0. */
+ if (REAL_VALUES_EQUAL (c, dconst0))
+ return omit_one_operand (type, build_real (type, dconst1),
+ arg0);
+
+ /* Optimize pow(x,1.0) = x. */
+ if (REAL_VALUES_EQUAL (c, dconst1))
+ return arg0;
+
+ /* Optimize pow(x,-1.0) = 1.0/x. */
+ if (REAL_VALUES_EQUAL (c, dconstm1))
+ return fold_build2 (RDIV_EXPR, type,
+ build_real (type, dconst1), arg0);
+
+ /* Optimize pow(x,0.5) = sqrt(x). */
+ if (flag_unsafe_math_optimizations
+ && REAL_VALUES_EQUAL (c, dconsthalf))
+ {
+ tree sqrtfn = mathfn_built_in (type, BUILT_IN_SQRT);
+
+ if (sqrtfn != NULL_TREE)
+ return build_call_expr (sqrtfn, 1, arg0);
+ }
+
+ /* Optimize pow(x,1.0/3.0) = cbrt(x). */
+ if (flag_unsafe_math_optimizations)
+ {
+ const REAL_VALUE_TYPE dconstroot
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
+
+ if (REAL_VALUES_EQUAL (c, dconstroot))
+ {
+ tree cbrtfn = mathfn_built_in (type, BUILT_IN_CBRT);
+ if (cbrtfn != NULL_TREE)
+ return build_call_expr (cbrtfn, 1, arg0);
+ }
+ }
+
+ /* Check for an integer exponent. */
+ n = real_to_integer (&c);
+ real_from_integer (&cint, VOIDmode, n, n < 0 ? -1 : 0, 0);
+ if (real_identical (&c, &cint))
+ {
+ /* Attempt to evaluate pow at compile-time, unless this should
+ raise an exception. */
+ if (TREE_CODE (arg0) == REAL_CST
+ && !TREE_OVERFLOW (arg0)
+ && (n > 0
+ || (!flag_trapping_math && !flag_errno_math)
+ || !REAL_VALUES_EQUAL (TREE_REAL_CST (arg0), dconst0)))
+ {
+ REAL_VALUE_TYPE x;
+ bool inexact;
+
+ x = TREE_REAL_CST (arg0);
+ inexact = real_powi (&x, TYPE_MODE (type), &x, n);
+ if (flag_unsafe_math_optimizations || !inexact)
+ return build_real (type, x);
+ }
+
+ /* Strip sign ops from even integer powers. */
+ if ((n & 1) == 0 && flag_unsafe_math_optimizations)
+ {
+ tree narg0 = fold_strip_sign_ops (arg0);
+ if (narg0)
+ return build_call_expr (fndecl, 2, narg0, arg1);
+ }
+ }
+ }
+
+ if (flag_unsafe_math_optimizations)
+ {
+ const enum built_in_function fcode = builtin_mathfn_code (arg0);
+
+ /* Optimize pow(expN(x),y) = expN(x*y). */
+ if (BUILTIN_EXPONENT_P (fcode))
+ {
+ tree expfn = TREE_OPERAND (CALL_EXPR_FN (arg0), 0);
+ tree arg = CALL_EXPR_ARG (arg0, 0);
+ arg = fold_build2 (MULT_EXPR, type, arg, arg1);
+ return build_call_expr (expfn, 1, arg);
+ }
+
+ /* Optimize pow(sqrt(x),y) = pow(x,y*0.5). */
+ if (BUILTIN_SQRT_P (fcode))
+ {
+ tree narg0 = CALL_EXPR_ARG (arg0, 0);
+ tree narg1 = fold_build2 (MULT_EXPR, type, arg1,
+ build_real (type, dconsthalf));
+ return build_call_expr (fndecl, 2, narg0, narg1);
+ }
+
+ /* Optimize pow(cbrt(x),y) = pow(x,y/3) iff x is nonnegative. */
+ if (BUILTIN_CBRT_P (fcode))
+ {
+ tree arg = CALL_EXPR_ARG (arg0, 0);
+ if (tree_expr_nonnegative_p (arg))
+ {
+ const REAL_VALUE_TYPE dconstroot
+ = real_value_truncate (TYPE_MODE (type), dconst_third ());
+ tree narg1 = fold_build2 (MULT_EXPR, type, arg1,
+ build_real (type, dconstroot));
+ return build_call_expr (fndecl, 2, arg, narg1);
+ }
+ }
+
+ /* Optimize pow(pow(x,y),z) = pow(x,y*z) iff x is nonnegative. */
+ if (fcode == BUILT_IN_POW
+ || fcode == BUILT_IN_POWF
+ || fcode == BUILT_IN_POWL)
+ {
+ tree arg00 = CALL_EXPR_ARG (arg0, 0);
+ if (tree_expr_nonnegative_p (arg00))
+ {
+ tree arg01 = CALL_EXPR_ARG (arg0, 1);
+ tree narg1 = fold_build2 (MULT_EXPR, type, arg01, arg1);
+ return build_call_expr (fndecl, 2, arg00, narg1);
+ }
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a builtin function call to powi, powif, or powil with argument ARG.
+ Return NULL_TREE if no simplification can be made. */
+static tree
+fold_builtin_powi (tree fndecl ATTRIBUTE_UNUSED,
+ tree arg0, tree arg1, tree type)
+{
+ if (!validate_arg (arg0, REAL_TYPE)
+ || !validate_arg (arg1, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* Optimize pow(1.0,y) = 1.0. */
+ if (real_onep (arg0))
+ return omit_one_operand (type, build_real (type, dconst1), arg1);
+
+ if (host_integerp (arg1, 0))
+ {
+ HOST_WIDE_INT c = TREE_INT_CST_LOW (arg1);
+
+ /* Evaluate powi at compile-time. */
+ if (TREE_CODE (arg0) == REAL_CST
+ && !TREE_OVERFLOW (arg0))
+ {
+ REAL_VALUE_TYPE x;
+ x = TREE_REAL_CST (arg0);
+ real_powi (&x, TYPE_MODE (type), &x, c);
+ return build_real (type, x);
+ }
+
+ /* Optimize pow(x,0) = 1.0. */
+ if (c == 0)
+ return omit_one_operand (type, build_real (type, dconst1),
+ arg0);
+
+ /* Optimize pow(x,1) = x. */
+ if (c == 1)
+ return arg0;
+
+ /* Optimize pow(x,-1) = 1.0/x. */
+ if (c == -1)
+ return fold_build2 (RDIV_EXPR, type,
+ build_real (type, dconst1), arg0);
+ }
+
+ return NULL_TREE;
+}
+
+/* A subroutine of fold_builtin to fold the various exponent
+ functions. Return NULL_TREE if no simplification can be made.
+ FUNC is the corresponding MPFR exponent function. */
+
+static tree
+fold_builtin_exponent (tree fndecl, tree arg,
+ int (*func)(mpfr_ptr, mpfr_srcptr, mp_rnd_t))
+{
+ if (validate_arg (arg, REAL_TYPE))
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ tree res;
+
+ /* Calculate the result when the argument is a constant. */
+ if ((res = do_mpfr_arg1 (arg, type, func, NULL, NULL, 0)))
+ return res;
+
+ /* Optimize expN(logN(x)) = x. */
+ if (flag_unsafe_math_optimizations)
+ {
+ const enum built_in_function fcode = builtin_mathfn_code (arg);
+
+ if ((func == mpfr_exp
+ && (fcode == BUILT_IN_LOG
+ || fcode == BUILT_IN_LOGF
+ || fcode == BUILT_IN_LOGL))
+ || (func == mpfr_exp2
+ && (fcode == BUILT_IN_LOG2
+ || fcode == BUILT_IN_LOG2F
+ || fcode == BUILT_IN_LOG2L))
+ || (func == mpfr_exp10
+ && (fcode == BUILT_IN_LOG10
+ || fcode == BUILT_IN_LOG10F
+ || fcode == BUILT_IN_LOG10L)))
+ return fold_convert (type, CALL_EXPR_ARG (arg, 0));
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Return true if VAR is a VAR_DECL or a component thereof. */
+
+static bool
+var_decl_component_p (tree var)
+{
+ tree inner = var;
+ while (handled_component_p (inner))
+ inner = TREE_OPERAND (inner, 0);
+ return SSA_VAR_P (inner);
+}
+
+/* Fold function call to builtin memset. Return
+ NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_memset (tree dest, tree c, tree len, tree type, bool ignore)
+{
+ tree var, ret;
+ unsigned HOST_WIDE_INT length, cval;
+
+ if (! validate_arg (dest, POINTER_TYPE)
+ || ! validate_arg (c, INTEGER_TYPE)
+ || ! validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (len, 1))
+ return NULL_TREE;
+
+ /* If the LEN parameter is zero, return DEST. */
+ if (integer_zerop (len))
+ return omit_one_operand (type, dest, c);
+
+ if (! host_integerp (c, 1) || TREE_SIDE_EFFECTS (dest))
+ return NULL_TREE;
+
+ var = dest;
+ STRIP_NOPS (var);
+ if (TREE_CODE (var) != ADDR_EXPR)
+ return NULL_TREE;
+
+ var = TREE_OPERAND (var, 0);
+ if (TREE_THIS_VOLATILE (var))
+ return NULL_TREE;
+
+ if (!INTEGRAL_TYPE_P (TREE_TYPE (var))
+ && !POINTER_TYPE_P (TREE_TYPE (var)))
+ return NULL_TREE;
+
+ if (! var_decl_component_p (var))
+ return NULL_TREE;
+
+ length = tree_low_cst (len, 1);
+ if (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (var))) != length
+ || get_pointer_alignment (dest, BIGGEST_ALIGNMENT) / BITS_PER_UNIT
+ < (int) length)
+ return NULL_TREE;
+
+ if (length > HOST_BITS_PER_WIDE_INT / BITS_PER_UNIT)
+ return NULL_TREE;
+
+ if (integer_zerop (c))
+ cval = 0;
+ else
+ {
+ if (CHAR_BIT != 8 || BITS_PER_UNIT != 8 || HOST_BITS_PER_WIDE_INT > 64)
+ return NULL_TREE;
+
+ cval = tree_low_cst (c, 1);
+ cval &= 0xff;
+ cval |= cval << 8;
+ cval |= cval << 16;
+ cval |= (cval << 31) << 1;
+ }
+
+ ret = build_int_cst_type (TREE_TYPE (var), cval);
+ ret = build2 (MODIFY_EXPR, TREE_TYPE (var), var, ret);
+ if (ignore)
+ return ret;
+
+ return omit_one_operand (type, dest, ret);
+}
+
+/* Fold function call to builtin memset. Return
+ NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_bzero (tree dest, tree size, bool ignore)
+{
+ if (! validate_arg (dest, POINTER_TYPE)
+ || ! validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ if (!ignore)
+ return NULL_TREE;
+
+ /* New argument list transforming bzero(ptr x, int y) to
+ memset(ptr x, int 0, size_t y). This is done this way
+ so that if it isn't expanded inline, we fallback to
+ calling bzero instead of memset. */
+
+ return fold_builtin_memset (dest, integer_zero_node,
+ fold_convert (sizetype, size),
+ void_type_node, ignore);
+}
+
+/* Fold function call to builtin mem{{,p}cpy,move}. Return
+ NULL_TREE if no simplification can be made.
+ If ENDP is 0, return DEST (like memcpy).
+ If ENDP is 1, return DEST+LEN (like mempcpy).
+ If ENDP is 2, return DEST+LEN-1 (like stpcpy).
+ If ENDP is 3, return DEST, additionally *SRC and *DEST may overlap
+ (memmove). */
+
+static tree
+fold_builtin_memory_op (tree dest, tree src, tree len, tree type, bool ignore, int endp)
+{
+ tree destvar, srcvar, expr;
+
+ if (! validate_arg (dest, POINTER_TYPE)
+ || ! validate_arg (src, POINTER_TYPE)
+ || ! validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If the LEN parameter is zero, return DEST. */
+ if (integer_zerop (len))
+ return omit_one_operand (type, dest, src);
+
+ /* If SRC and DEST are the same (and not volatile), return
+ DEST{,+LEN,+LEN-1}. */
+ if (operand_equal_p (src, dest, 0))
+ expr = len;
+ else
+ {
+ tree srctype, desttype;
+ int src_align, dest_align;
+
+ if (endp == 3)
+ {
+ src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
+ dest_align = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+
+ /* Both DEST and SRC must be pointer types.
+ ??? This is what old code did. Is the testing for pointer types
+ really mandatory?
+
+ If either SRC is readonly or length is 1, we can use memcpy. */
+ if (dest_align && src_align
+ && (readonly_data_expr (src)
+ || (host_integerp (len, 1)
+ && (MIN (src_align, dest_align) / BITS_PER_UNIT >=
+ tree_low_cst (len, 1)))))
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
+ return NULL_TREE;
+ return build_call_expr (fn, 3, dest, src, len);
+ }
+ return NULL_TREE;
+ }
+
+ if (!host_integerp (len, 0))
+ return NULL_TREE;
+ /* FIXME:
+ This logic lose for arguments like (type *)malloc (sizeof (type)),
+ since we strip the casts of up to VOID return value from malloc.
+ Perhaps we ought to inherit type from non-VOID argument here? */
+ STRIP_NOPS (src);
+ STRIP_NOPS (dest);
+ srctype = TREE_TYPE (TREE_TYPE (src));
+ desttype = TREE_TYPE (TREE_TYPE (dest));
+ if (!srctype || !desttype
+ || !TYPE_SIZE_UNIT (srctype)
+ || !TYPE_SIZE_UNIT (desttype)
+ || TREE_CODE (TYPE_SIZE_UNIT (srctype)) != INTEGER_CST
+ || TREE_CODE (TYPE_SIZE_UNIT (desttype)) != INTEGER_CST
+ || TYPE_VOLATILE (srctype)
+ || TYPE_VOLATILE (desttype))
+ return NULL_TREE;
+
+ src_align = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
+ dest_align = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+ if (dest_align < (int) TYPE_ALIGN (desttype)
+ || src_align < (int) TYPE_ALIGN (srctype))
+ return NULL_TREE;
+
+ if (!ignore)
+ dest = builtin_save_expr (dest);
+
+ srcvar = NULL_TREE;
+ if (tree_int_cst_equal (TYPE_SIZE_UNIT (srctype), len))
+ {
+ srcvar = build_fold_indirect_ref (src);
+ if (TREE_THIS_VOLATILE (srcvar))
+ return NULL_TREE;
+ else if (!tree_int_cst_equal (lang_hooks.expr_size (srcvar), len))
+ srcvar = NULL_TREE;
+ /* With memcpy, it is possible to bypass aliasing rules, so without
+ this check i.e. execute/20060930-2.c would be misoptimized,
+ because it use conflicting alias set to hold argument for the
+ memcpy call. This check is probably unnecessary with
+ -fno-strict-aliasing. Similarly for destvar. See also
+ PR29286. */
+ else if (!var_decl_component_p (srcvar))
+ srcvar = NULL_TREE;
+ }
+
+ destvar = NULL_TREE;
+ if (tree_int_cst_equal (TYPE_SIZE_UNIT (desttype), len))
+ {
+ destvar = build_fold_indirect_ref (dest);
+ if (TREE_THIS_VOLATILE (destvar))
+ return NULL_TREE;
+ else if (!tree_int_cst_equal (lang_hooks.expr_size (destvar), len))
+ destvar = NULL_TREE;
+ else if (!var_decl_component_p (destvar))
+ destvar = NULL_TREE;
+ }
+
+ if (srcvar == NULL_TREE && destvar == NULL_TREE)
+ return NULL_TREE;
+
+ if (srcvar == NULL_TREE)
+ {
+ tree srcptype;
+ if (TREE_ADDRESSABLE (TREE_TYPE (destvar)))
+ return NULL_TREE;
+
+ srctype = build_qualified_type (desttype, 0);
+ if (src_align < (int) TYPE_ALIGN (srctype))
+ {
+ if (AGGREGATE_TYPE_P (srctype)
+ || SLOW_UNALIGNED_ACCESS (TYPE_MODE (srctype), src_align))
+ return NULL_TREE;
+
+ srctype = build_variant_type_copy (srctype);
+ TYPE_ALIGN (srctype) = src_align;
+ TYPE_USER_ALIGN (srctype) = 1;
+ TYPE_PACKED (srctype) = 1;
+ }
+ srcptype = build_pointer_type_for_mode (srctype, ptr_mode, true);
+ src = fold_convert (srcptype, src);
+ srcvar = build_fold_indirect_ref (src);
+ }
+ else if (destvar == NULL_TREE)
+ {
+ tree destptype;
+ if (TREE_ADDRESSABLE (TREE_TYPE (srcvar)))
+ return NULL_TREE;
+
+ desttype = build_qualified_type (srctype, 0);
+ if (dest_align < (int) TYPE_ALIGN (desttype))
+ {
+ if (AGGREGATE_TYPE_P (desttype)
+ || SLOW_UNALIGNED_ACCESS (TYPE_MODE (desttype), dest_align))
+ return NULL_TREE;
+
+ desttype = build_variant_type_copy (desttype);
+ TYPE_ALIGN (desttype) = dest_align;
+ TYPE_USER_ALIGN (desttype) = 1;
+ TYPE_PACKED (desttype) = 1;
+ }
+ destptype = build_pointer_type_for_mode (desttype, ptr_mode, true);
+ dest = fold_convert (destptype, dest);
+ destvar = build_fold_indirect_ref (dest);
+ }
+
+ if (srctype == desttype
+ || (gimple_in_ssa_p (cfun)
+ && useless_type_conversion_p (desttype, srctype)))
+ expr = srcvar;
+ else if ((INTEGRAL_TYPE_P (TREE_TYPE (srcvar))
+ || POINTER_TYPE_P (TREE_TYPE (srcvar)))
+ && (INTEGRAL_TYPE_P (TREE_TYPE (destvar))
+ || POINTER_TYPE_P (TREE_TYPE (destvar))))
+ expr = fold_convert (TREE_TYPE (destvar), srcvar);
+ else
+ expr = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (destvar), srcvar);
+ expr = build2 (MODIFY_EXPR, TREE_TYPE (destvar), destvar, expr);
+ }
+
+ if (ignore)
+ return expr;
+
+ if (endp == 0 || endp == 3)
+ return omit_one_operand (type, dest, expr);
+
+ if (expr == len)
+ expr = NULL_TREE;
+
+ if (endp == 2)
+ len = fold_build2 (MINUS_EXPR, TREE_TYPE (len), len,
+ ssize_int (1));
+
+ len = fold_convert (sizetype, len);
+ dest = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (dest), dest, len);
+ dest = fold_convert (type, dest);
+ if (expr)
+ dest = omit_one_operand (type, dest, expr);
+ return dest;
+}
+
+/* Fold function call to builtin strcpy with arguments DEST and SRC.
+ If LEN is not NULL, it represents the length of the string to be
+ copied. Return NULL_TREE if no simplification can be made. */
+
+tree
+fold_builtin_strcpy (tree fndecl, tree dest, tree src, tree len)
+{
+ tree fn;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE))
+ return NULL_TREE;
+
+ /* If SRC and DEST are the same (and not volatile), return DEST. */
+ if (operand_equal_p (src, dest, 0))
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), dest);
+
+ if (optimize_function_for_size_p (cfun))
+ return NULL_TREE;
+
+ fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
+ return NULL_TREE;
+
+ if (!len)
+ {
+ len = c_strlen (src, 1);
+ if (! len || TREE_SIDE_EFFECTS (len))
+ return NULL_TREE;
+ }
+
+ len = size_binop (PLUS_EXPR, len, ssize_int (1));
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)),
+ build_call_expr (fn, 3, dest, src, len));
+}
+
+/* Fold function call to builtin strncpy with arguments DEST, SRC, and LEN.
+ If SLEN is not NULL, it represents the length of the source string.
+ Return NULL_TREE if no simplification can be made. */
+
+tree
+fold_builtin_strncpy (tree fndecl, tree dest, tree src, tree len, tree slen)
+{
+ tree fn;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If the LEN parameter is zero, return DEST. */
+ if (integer_zerop (len))
+ return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl)), dest, src);
+
+ /* We can't compare slen with len as constants below if len is not a
+ constant. */
+ if (len == 0 || TREE_CODE (len) != INTEGER_CST)
+ return NULL_TREE;
+
+ if (!slen)
+ slen = c_strlen (src, 1);
+
+ /* Now, we must be passed a constant src ptr parameter. */
+ if (slen == 0 || TREE_CODE (slen) != INTEGER_CST)
+ return NULL_TREE;
+
+ slen = size_binop (PLUS_EXPR, slen, ssize_int (1));
+
+ /* We do not support simplification of this case, though we do
+ support it when expanding trees into RTL. */
+ /* FIXME: generate a call to __builtin_memset. */
+ if (tree_int_cst_lt (slen, len))
+ return NULL_TREE;
+
+ /* OK transform into builtin memcpy. */
+ fn = implicit_built_in_decls[BUILT_IN_MEMCPY];
+ if (!fn)
+ return NULL_TREE;
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)),
+ build_call_expr (fn, 3, dest, src, len));
+}
+
+/* Fold function call to builtin memchr. ARG1, ARG2 and LEN are the
+ arguments to the call, and TYPE is its return type.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_memchr (tree arg1, tree arg2, tree len, tree type)
+{
+ if (!validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, INTEGER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p1;
+
+ if (TREE_CODE (arg2) != INTEGER_CST
+ || !host_integerp (len, 1))
+ return NULL_TREE;
+
+ p1 = c_getstr (arg1);
+ if (p1 && compare_tree_int (len, strlen (p1) + 1) <= 0)
+ {
+ char c;
+ const char *r;
+ tree tem;
+
+ if (target_char_cast (arg2, &c))
+ return NULL_TREE;
+
+ r = (char *) memchr (p1, c, tree_low_cst (len, 1));
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (arg1), 0);
+
+ tem = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (arg1), arg1,
+ size_int (r - p1));
+ return fold_convert (type, tem);
+ }
+ return NULL_TREE;
+ }
+}
+
+/* Fold function call to builtin memcmp with arguments ARG1 and ARG2.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_memcmp (tree arg1, tree arg2, tree len)
+{
+ const char *p1, *p2;
+
+ if (!validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, POINTER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If the LEN parameter is zero, return zero. */
+ if (integer_zerop (len))
+ return omit_two_operands (integer_type_node, integer_zero_node,
+ arg1, arg2);
+
+ /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
+ if (operand_equal_p (arg1, arg2, 0))
+ return omit_one_operand (integer_type_node, integer_zero_node, len);
+
+ p1 = c_getstr (arg1);
+ p2 = c_getstr (arg2);
+
+ /* If all arguments are constant, and the value of len is not greater
+ than the lengths of arg1 and arg2, evaluate at compile-time. */
+ if (host_integerp (len, 1) && p1 && p2
+ && compare_tree_int (len, strlen (p1) + 1) <= 0
+ && compare_tree_int (len, strlen (p2) + 1) <= 0)
+ {
+ const int r = memcmp (p1, p2, tree_low_cst (len, 1));
+
+ if (r > 0)
+ return integer_one_node;
+ else if (r < 0)
+ return integer_minus_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ /* If len parameter is one, return an expression corresponding to
+ (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
+ if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ tree ind1 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ tree ind2 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold_build2 (MINUS_EXPR, integer_type_node, ind1, ind2);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin strcmp with arguments ARG1 and ARG2.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_strcmp (tree arg1, tree arg2)
+{
+ const char *p1, *p2;
+
+ if (!validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, POINTER_TYPE))
+ return NULL_TREE;
+
+ /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
+ if (operand_equal_p (arg1, arg2, 0))
+ return integer_zero_node;
+
+ p1 = c_getstr (arg1);
+ p2 = c_getstr (arg2);
+
+ if (p1 && p2)
+ {
+ const int i = strcmp (p1, p2);
+ if (i < 0)
+ return integer_minus_one_node;
+ else if (i > 0)
+ return integer_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ /* If the second arg is "", return *(const unsigned char*)arg1. */
+ if (p2 && *p2 == '\0')
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ return fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ }
+
+ /* If the first arg is "", return -*(const unsigned char*)arg2. */
+ if (p1 && *p1 == '\0')
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ tree temp = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold_build1 (NEGATE_EXPR, integer_type_node, temp);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin strncmp with arguments ARG1, ARG2, and LEN.
+ Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_strncmp (tree arg1, tree arg2, tree len)
+{
+ const char *p1, *p2;
+
+ if (!validate_arg (arg1, POINTER_TYPE)
+ || !validate_arg (arg2, POINTER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If the LEN parameter is zero, return zero. */
+ if (integer_zerop (len))
+ return omit_two_operands (integer_type_node, integer_zero_node,
+ arg1, arg2);
+
+ /* If ARG1 and ARG2 are the same (and not volatile), return zero. */
+ if (operand_equal_p (arg1, arg2, 0))
+ return omit_one_operand (integer_type_node, integer_zero_node, len);
+
+ p1 = c_getstr (arg1);
+ p2 = c_getstr (arg2);
+
+ if (host_integerp (len, 1) && p1 && p2)
+ {
+ const int i = strncmp (p1, p2, tree_low_cst (len, 1));
+ if (i > 0)
+ return integer_one_node;
+ else if (i < 0)
+ return integer_minus_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ /* If the second arg is "", and the length is greater than zero,
+ return *(const unsigned char*)arg1. */
+ if (p2 && *p2 == '\0'
+ && TREE_CODE (len) == INTEGER_CST
+ && tree_int_cst_sgn (len) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ return fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ }
+
+ /* If the first arg is "", and the length is greater than zero,
+ return -*(const unsigned char*)arg2. */
+ if (p1 && *p1 == '\0'
+ && TREE_CODE (len) == INTEGER_CST
+ && tree_int_cst_sgn (len) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ tree temp = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold_build1 (NEGATE_EXPR, integer_type_node, temp);
+ }
+
+ /* If len parameter is one, return an expression corresponding to
+ (*(const unsigned char*)arg1 - (const unsigned char*)arg2). */
+ if (host_integerp (len, 1) && tree_low_cst (len, 1) == 1)
+ {
+ tree cst_uchar_node = build_type_variant (unsigned_char_type_node, 1, 0);
+ tree cst_uchar_ptr_node
+ = build_pointer_type_for_mode (cst_uchar_node, ptr_mode, true);
+
+ tree ind1 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg1)));
+ tree ind2 = fold_convert (integer_type_node,
+ build1 (INDIRECT_REF, cst_uchar_node,
+ fold_convert (cst_uchar_ptr_node,
+ arg2)));
+ return fold_build2 (MINUS_EXPR, integer_type_node, ind1, ind2);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin signbit, signbitf or signbitl with argument
+ ARG. Return NULL_TREE if no simplification can be made. */
+
+static tree
+fold_builtin_signbit (tree arg, tree type)
+{
+ tree temp;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ /* If ARG is a compile-time constant, determine the result. */
+ if (TREE_CODE (arg) == REAL_CST
+ && !TREE_OVERFLOW (arg))
+ {
+ REAL_VALUE_TYPE c;
+
+ c = TREE_REAL_CST (arg);
+ temp = REAL_VALUE_NEGATIVE (c) ? integer_one_node : integer_zero_node;
+ return fold_convert (type, temp);
+ }
+
+ /* If ARG is non-negative, the result is always zero. */
+ if (tree_expr_nonnegative_p (arg))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ /* If ARG's format doesn't have signed zeros, return "arg < 0.0". */
+ if (!HONOR_SIGNED_ZEROS (TYPE_MODE (TREE_TYPE (arg))))
+ return fold_build2 (LT_EXPR, type, arg,
+ build_real (TREE_TYPE (arg), dconst0));
+
+ return NULL_TREE;
+}
+
+/* Fold function call to builtin copysign, copysignf or copysignl with
+ arguments ARG1 and ARG2. Return NULL_TREE if no simplification can
+ be made. */
+
+static tree
+fold_builtin_copysign (tree fndecl, tree arg1, tree arg2, tree type)
+{
+ tree tem;
+
+ if (!validate_arg (arg1, REAL_TYPE)
+ || !validate_arg (arg2, REAL_TYPE))
+ return NULL_TREE;
+
+ /* copysign(X,X) is X. */
+ if (operand_equal_p (arg1, arg2, 0))
+ return fold_convert (type, arg1);
+
+ /* If ARG1 and ARG2 are compile-time constants, determine the result. */
+ if (TREE_CODE (arg1) == REAL_CST
+ && TREE_CODE (arg2) == REAL_CST
+ && !TREE_OVERFLOW (arg1)
+ && !TREE_OVERFLOW (arg2))
+ {
+ REAL_VALUE_TYPE c1, c2;
+
+ c1 = TREE_REAL_CST (arg1);
+ c2 = TREE_REAL_CST (arg2);
+ /* c1.sign := c2.sign. */
+ real_copysign (&c1, &c2);
+ return build_real (type, c1);
+ }
+
+ /* copysign(X, Y) is fabs(X) when Y is always non-negative.
+ Remember to evaluate Y for side-effects. */
+ if (tree_expr_nonnegative_p (arg2))
+ return omit_one_operand (type,
+ fold_build1 (ABS_EXPR, type, arg1),
+ arg2);
+
+ /* Strip sign changing operations for the first argument. */
+ tem = fold_strip_sign_ops (arg1);
+ if (tem)
+ return build_call_expr (fndecl, 2, tem, arg2);
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin isascii with argument ARG. */
+
+static tree
+fold_builtin_isascii (tree arg)
+{
+ if (!validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ /* Transform isascii(c) -> ((c & ~0x7f) == 0). */
+ arg = build2 (BIT_AND_EXPR, integer_type_node, arg,
+ build_int_cst (NULL_TREE,
+ ~ (unsigned HOST_WIDE_INT) 0x7f));
+ return fold_build2 (EQ_EXPR, integer_type_node,
+ arg, integer_zero_node);
+ }
+}
+
+/* Fold a call to builtin toascii with argument ARG. */
+
+static tree
+fold_builtin_toascii (tree arg)
+{
+ if (!validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* Transform toascii(c) -> (c & 0x7f). */
+ return fold_build2 (BIT_AND_EXPR, integer_type_node, arg,
+ build_int_cst (NULL_TREE, 0x7f));
+}
+
+/* Fold a call to builtin isdigit with argument ARG. */
+
+static tree
+fold_builtin_isdigit (tree arg)
+{
+ if (!validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ /* Transform isdigit(c) -> (unsigned)(c) - '0' <= 9. */
+ /* According to the C standard, isdigit is unaffected by locale.
+ However, it definitely is affected by the target character set. */
+ unsigned HOST_WIDE_INT target_digit0
+ = lang_hooks.to_target_charset ('0');
+
+ if (target_digit0 == 0)
+ return NULL_TREE;
+
+ arg = fold_convert (unsigned_type_node, arg);
+ arg = build2 (MINUS_EXPR, unsigned_type_node, arg,
+ build_int_cst (unsigned_type_node, target_digit0));
+ return fold_build2 (LE_EXPR, integer_type_node, arg,
+ build_int_cst (unsigned_type_node, 9));
+ }
+}
+
+/* Fold a call to fabs, fabsf or fabsl with argument ARG. */
+
+static tree
+fold_builtin_fabs (tree arg, tree type)
+{
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ arg = fold_convert (type, arg);
+ if (TREE_CODE (arg) == REAL_CST)
+ return fold_abs_const (arg, type);
+ return fold_build1 (ABS_EXPR, type, arg);
+}
+
+/* Fold a call to abs, labs, llabs or imaxabs with argument ARG. */
+
+static tree
+fold_builtin_abs (tree arg, tree type)
+{
+ if (!validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+
+ arg = fold_convert (type, arg);
+ if (TREE_CODE (arg) == INTEGER_CST)
+ return fold_abs_const (arg, type);
+ return fold_build1 (ABS_EXPR, type, arg);
+}
+
+/* Fold a call to builtin fmin or fmax. */
+
+static tree
+fold_builtin_fmin_fmax (tree arg0, tree arg1, tree type, bool max)
+{
+ if (validate_arg (arg0, REAL_TYPE) && validate_arg (arg1, REAL_TYPE))
+ {
+ /* Calculate the result when the argument is a constant. */
+ tree res = do_mpfr_arg2 (arg0, arg1, type, (max ? mpfr_max : mpfr_min));
+
+ if (res)
+ return res;
+
+ /* If either argument is NaN, return the other one. Avoid the
+ transformation if we get (and honor) a signalling NaN. Using
+ omit_one_operand() ensures we create a non-lvalue. */
+ if (TREE_CODE (arg0) == REAL_CST
+ && real_isnan (&TREE_REAL_CST (arg0))
+ && (! HONOR_SNANS (TYPE_MODE (TREE_TYPE (arg0)))
+ || ! TREE_REAL_CST (arg0).signalling))
+ return omit_one_operand (type, arg1, arg0);
+ if (TREE_CODE (arg1) == REAL_CST
+ && real_isnan (&TREE_REAL_CST (arg1))
+ && (! HONOR_SNANS (TYPE_MODE (TREE_TYPE (arg1)))
+ || ! TREE_REAL_CST (arg1).signalling))
+ return omit_one_operand (type, arg0, arg1);
+
+ /* Transform fmin/fmax(x,x) -> x. */
+ if (operand_equal_p (arg0, arg1, OEP_PURE_SAME))
+ return omit_one_operand (type, arg0, arg1);
+
+ /* Convert fmin/fmax to MIN_EXPR/MAX_EXPR. C99 requires these
+ functions to return the numeric arg if the other one is NaN.
+ These tree codes don't honor that, so only transform if
+ -ffinite-math-only is set. C99 doesn't require -0.0 to be
+ handled, so we don't have to worry about it either. */
+ if (flag_finite_math_only)
+ return fold_build2 ((max ? MAX_EXPR : MIN_EXPR), type,
+ fold_convert (type, arg0),
+ fold_convert (type, arg1));
+ }
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin carg(a+bi) -> atan2(b,a). */
+
+static tree
+fold_builtin_carg (tree arg, tree type)
+{
+ if (validate_arg (arg, COMPLEX_TYPE))
+ {
+ tree atan2_fn = mathfn_built_in (type, BUILT_IN_ATAN2);
+
+ if (atan2_fn)
+ {
+ tree new_arg = builtin_save_expr (arg);
+ tree r_arg = fold_build1 (REALPART_EXPR, type, new_arg);
+ tree i_arg = fold_build1 (IMAGPART_EXPR, type, new_arg);
+ return build_call_expr (atan2_fn, 2, i_arg, r_arg);
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin logb/ilogb. */
+
+static tree
+fold_builtin_logb (tree arg, tree rettype)
+{
+ if (! validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ STRIP_NOPS (arg);
+
+ if (TREE_CODE (arg) == REAL_CST && ! TREE_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg);
+
+ switch (value->cl)
+ {
+ case rvc_nan:
+ case rvc_inf:
+ /* If arg is Inf or NaN and we're logb, return it. */
+ if (TREE_CODE (rettype) == REAL_TYPE)
+ return fold_convert (rettype, arg);
+ /* Fall through... */
+ case rvc_zero:
+ /* Zero may set errno and/or raise an exception for logb, also
+ for ilogb we don't know FP_ILOGB0. */
+ return NULL_TREE;
+ case rvc_normal:
+ /* For normal numbers, proceed iff radix == 2. In GCC,
+ normalized significands are in the range [0.5, 1.0). We
+ want the exponent as if they were [1.0, 2.0) so get the
+ exponent and subtract 1. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (arg)))->b == 2)
+ return fold_convert (rettype, build_int_cst (NULL_TREE,
+ REAL_EXP (value)-1));
+ break;
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin significand, if radix == 2. */
+
+static tree
+fold_builtin_significand (tree arg, tree rettype)
+{
+ if (! validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ STRIP_NOPS (arg);
+
+ if (TREE_CODE (arg) == REAL_CST && ! TREE_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg);
+
+ switch (value->cl)
+ {
+ case rvc_zero:
+ case rvc_nan:
+ case rvc_inf:
+ /* If arg is +-0, +-Inf or +-NaN, then return it. */
+ return fold_convert (rettype, arg);
+ case rvc_normal:
+ /* For normal numbers, proceed iff radix == 2. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (TREE_TYPE (arg)))->b == 2)
+ {
+ REAL_VALUE_TYPE result = *value;
+ /* In GCC, normalized significands are in the range [0.5,
+ 1.0). We want them to be [1.0, 2.0) so set the
+ exponent to 1. */
+ SET_REAL_EXP (&result, 1);
+ return build_real (rettype, result);
+ }
+ break;
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin frexp, we can assume the base is 2. */
+
+static tree
+fold_builtin_frexp (tree arg0, tree arg1, tree rettype)
+{
+ if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE))
+ return NULL_TREE;
+
+ STRIP_NOPS (arg0);
+
+ if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0)))
+ return NULL_TREE;
+
+ arg1 = build_fold_indirect_ref (arg1);
+
+ /* Proceed if a valid pointer type was passed in. */
+ if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == integer_type_node)
+ {
+ const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0);
+ tree frac, exp;
+
+ switch (value->cl)
+ {
+ case rvc_zero:
+ /* For +-0, return (*exp = 0, +-0). */
+ exp = integer_zero_node;
+ frac = arg0;
+ break;
+ case rvc_nan:
+ case rvc_inf:
+ /* For +-NaN or +-Inf, *exp is unspecified, return arg0. */
+ return omit_one_operand (rettype, arg0, arg1);
+ case rvc_normal:
+ {
+ /* Since the frexp function always expects base 2, and in
+ GCC normalized significands are already in the range
+ [0.5, 1.0), we have exactly what frexp wants. */
+ REAL_VALUE_TYPE frac_rvt = *value;
+ SET_REAL_EXP (&frac_rvt, 0);
+ frac = build_real (rettype, frac_rvt);
+ exp = build_int_cst (NULL_TREE, REAL_EXP (value));
+ }
+ break;
+ default:
+ gcc_unreachable ();
+ }
+
+ /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */
+ arg1 = fold_build2 (MODIFY_EXPR, rettype, arg1, exp);
+ TREE_SIDE_EFFECTS (arg1) = 1;
+ return fold_build2 (COMPOUND_EXPR, rettype, arg1, frac);
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin ldexp or scalbn/scalbln. If LDEXP is true
+ then we can assume the base is two. If it's false, then we have to
+ check the mode of the TYPE parameter in certain cases. */
+
+static tree
+fold_builtin_load_exponent (tree arg0, tree arg1, tree type, bool ldexp)
+{
+ if (validate_arg (arg0, REAL_TYPE) && validate_arg (arg1, INTEGER_TYPE))
+ {
+ STRIP_NOPS (arg0);
+ STRIP_NOPS (arg1);
+
+ /* If arg0 is 0, Inf or NaN, or if arg1 is 0, then return arg0. */
+ if (real_zerop (arg0) || integer_zerop (arg1)
+ || (TREE_CODE (arg0) == REAL_CST
+ && !real_isfinite (&TREE_REAL_CST (arg0))))
+ return omit_one_operand (type, arg0, arg1);
+
+ /* If both arguments are constant, then try to evaluate it. */
+ if ((ldexp || REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2)
+ && TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0)
+ && host_integerp (arg1, 0))
+ {
+ /* Bound the maximum adjustment to twice the range of the
+ mode's valid exponents. Use abs to ensure the range is
+ positive as a sanity check. */
+ const long max_exp_adj = 2 *
+ labs (REAL_MODE_FORMAT (TYPE_MODE (type))->emax
+ - REAL_MODE_FORMAT (TYPE_MODE (type))->emin);
+
+ /* Get the user-requested adjustment. */
+ const HOST_WIDE_INT req_exp_adj = tree_low_cst (arg1, 0);
+
+ /* The requested adjustment must be inside this range. This
+ is a preliminary cap to avoid things like overflow, we
+ may still fail to compute the result for other reasons. */
+ if (-max_exp_adj < req_exp_adj && req_exp_adj < max_exp_adj)
+ {
+ REAL_VALUE_TYPE initial_result;
+
+ real_ldexp (&initial_result, &TREE_REAL_CST (arg0), req_exp_adj);
+
+ /* Ensure we didn't overflow. */
+ if (! real_isinf (&initial_result))
+ {
+ const REAL_VALUE_TYPE trunc_result
+ = real_value_truncate (TYPE_MODE (type), initial_result);
+
+ /* Only proceed if the target mode can hold the
+ resulting value. */
+ if (REAL_VALUES_EQUAL (initial_result, trunc_result))
+ return build_real (type, trunc_result);
+ }
+ }
+ }
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to builtin modf. */
+
+static tree
+fold_builtin_modf (tree arg0, tree arg1, tree rettype)
+{
+ if (! validate_arg (arg0, REAL_TYPE) || ! validate_arg (arg1, POINTER_TYPE))
+ return NULL_TREE;
+
+ STRIP_NOPS (arg0);
+
+ if (!(TREE_CODE (arg0) == REAL_CST && ! TREE_OVERFLOW (arg0)))
+ return NULL_TREE;
+
+ arg1 = build_fold_indirect_ref (arg1);
+
+ /* Proceed if a valid pointer type was passed in. */
+ if (TYPE_MAIN_VARIANT (TREE_TYPE (arg1)) == TYPE_MAIN_VARIANT (rettype))
+ {
+ const REAL_VALUE_TYPE *const value = TREE_REAL_CST_PTR (arg0);
+ REAL_VALUE_TYPE trunc, frac;
+
+ switch (value->cl)
+ {
+ case rvc_nan:
+ case rvc_zero:
+ /* For +-NaN or +-0, return (*arg1 = arg0, arg0). */
+ trunc = frac = *value;
+ break;
+ case rvc_inf:
+ /* For +-Inf, return (*arg1 = arg0, +-0). */
+ frac = dconst0;
+ frac.sign = value->sign;
+ trunc = *value;
+ break;
+ case rvc_normal:
+ /* Return (*arg1 = trunc(arg0), arg0-trunc(arg0)). */
+ real_trunc (&trunc, VOIDmode, value);
+ real_arithmetic (&frac, MINUS_EXPR, value, &trunc);
+ /* If the original number was negative and already
+ integral, then the fractional part is -0.0. */
+ if (value->sign && frac.cl == rvc_zero)
+ frac.sign = value->sign;
+ break;
+ }
+
+ /* Create the COMPOUND_EXPR (*arg1 = trunc, frac). */
+ arg1 = fold_build2 (MODIFY_EXPR, rettype, arg1,
+ build_real (rettype, trunc));
+ TREE_SIDE_EFFECTS (arg1) = 1;
+ return fold_build2 (COMPOUND_EXPR, rettype, arg1,
+ build_real (rettype, frac));
+ }
+
+ return NULL_TREE;
+}
+
+/* Fold a call to __builtin_isnan(), __builtin_isinf, __builtin_finite.
+ ARG is the argument for the call. */
+
+static tree
+fold_builtin_classify (tree fndecl, tree arg, int builtin_index)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+
+ if (!validate_arg (arg, REAL_TYPE))
+ return NULL_TREE;
+
+ switch (builtin_index)
+ {
+ case BUILT_IN_ISINF:
+ if (!HONOR_INFINITIES (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ if (real_isinf (&r))
+ return real_compare (GT_EXPR, &r, &dconst0)
+ ? integer_one_node : integer_minus_one_node;
+ else
+ return integer_zero_node;
+ }
+
+ return NULL_TREE;
+
+ case BUILT_IN_ISINF_SIGN:
+ {
+ /* isinf_sign(x) -> isinf(x) ? (signbit(x) ? -1 : 1) : 0 */
+ /* In a boolean context, GCC will fold the inner COND_EXPR to
+ 1. So e.g. "if (isinf_sign(x))" would be folded to just
+ "if (isinf(x) ? 1 : 0)" which becomes "if (isinf(x))". */
+ tree signbit_fn = mathfn_built_in_1 (TREE_TYPE (arg), BUILT_IN_SIGNBIT, 0);
+ tree isinf_fn = built_in_decls[BUILT_IN_ISINF];
+ tree tmp = NULL_TREE;
+
+ arg = builtin_save_expr (arg);
+
+ if (signbit_fn && isinf_fn)
+ {
+ tree signbit_call = build_call_expr (signbit_fn, 1, arg);
+ tree isinf_call = build_call_expr (isinf_fn, 1, arg);
+
+ signbit_call = fold_build2 (NE_EXPR, integer_type_node,
+ signbit_call, integer_zero_node);
+ isinf_call = fold_build2 (NE_EXPR, integer_type_node,
+ isinf_call, integer_zero_node);
+
+ tmp = fold_build3 (COND_EXPR, integer_type_node, signbit_call,
+ integer_minus_one_node, integer_one_node);
+ tmp = fold_build3 (COND_EXPR, integer_type_node, isinf_call, tmp,
+ integer_zero_node);
+ }
+
+ return tmp;
+ }
+
+ case BUILT_IN_ISFINITE:
+ if (!HONOR_NANS (TYPE_MODE (TREE_TYPE (arg)))
+ && !HONOR_INFINITIES (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_one_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ return real_isfinite (&r) ? integer_one_node : integer_zero_node;
+ }
+
+ return NULL_TREE;
+
+ case BUILT_IN_ISNAN:
+ if (!HONOR_NANS (TYPE_MODE (TREE_TYPE (arg))))
+ return omit_one_operand (type, integer_zero_node, arg);
+
+ if (TREE_CODE (arg) == REAL_CST)
+ {
+ r = TREE_REAL_CST (arg);
+ return real_isnan (&r) ? integer_one_node : integer_zero_node;
+ }
+
+ arg = builtin_save_expr (arg);
+ return fold_build2 (UNORDERED_EXPR, type, arg, arg);
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Fold a call to __builtin_fpclassify(int, int, int, int, int, ...).
+ This builtin will generate code to return the appropriate floating
+ point classification depending on the value of the floating point
+ number passed in. The possible return values must be supplied as
+ int arguments to the call in the following order: FP_NAN, FP_INFINITE,
+ FP_NORMAL, FP_SUBNORMAL and FP_ZERO. The ellipses is for exactly
+ one floating point argument which is "type generic". */
+
+static tree
+fold_builtin_fpclassify (tree exp)
+{
+ tree fp_nan, fp_infinite, fp_normal, fp_subnormal, fp_zero,
+ arg, type, res, tmp;
+ enum machine_mode mode;
+ REAL_VALUE_TYPE r;
+ char buf[128];
+
+ /* Verify the required arguments in the original call. */
+ if (!validate_arglist (exp, INTEGER_TYPE, INTEGER_TYPE,
+ INTEGER_TYPE, INTEGER_TYPE,
+ INTEGER_TYPE, REAL_TYPE, VOID_TYPE))
+ return NULL_TREE;
+
+ fp_nan = CALL_EXPR_ARG (exp, 0);
+ fp_infinite = CALL_EXPR_ARG (exp, 1);
+ fp_normal = CALL_EXPR_ARG (exp, 2);
+ fp_subnormal = CALL_EXPR_ARG (exp, 3);
+ fp_zero = CALL_EXPR_ARG (exp, 4);
+ arg = CALL_EXPR_ARG (exp, 5);
+ type = TREE_TYPE (arg);
+ mode = TYPE_MODE (type);
+ arg = builtin_save_expr (fold_build1 (ABS_EXPR, type, arg));
+
+ /* fpclassify(x) ->
+ isnan(x) ? FP_NAN :
+ (fabs(x) == Inf ? FP_INFINITE :
+ (fabs(x) >= DBL_MIN ? FP_NORMAL :
+ (x == 0 ? FP_ZERO : FP_SUBNORMAL))). */
+
+ tmp = fold_build2 (EQ_EXPR, integer_type_node, arg,
+ build_real (type, dconst0));
+ res = fold_build3 (COND_EXPR, integer_type_node, tmp, fp_zero, fp_subnormal);
+
+ sprintf (buf, "0x1p%d", REAL_MODE_FORMAT (mode)->emin - 1);
+ real_from_string (&r, buf);
+ tmp = fold_build2 (GE_EXPR, integer_type_node, arg, build_real (type, r));
+ res = fold_build3 (COND_EXPR, integer_type_node, tmp, fp_normal, res);
+
+ if (HONOR_INFINITIES (mode))
+ {
+ real_inf (&r);
+ tmp = fold_build2 (EQ_EXPR, integer_type_node, arg,
+ build_real (type, r));
+ res = fold_build3 (COND_EXPR, integer_type_node, tmp, fp_infinite, res);
+ }
+
+ if (HONOR_NANS (mode))
+ {
+ tmp = fold_build2 (ORDERED_EXPR, integer_type_node, arg, arg);
+ res = fold_build3 (COND_EXPR, integer_type_node, tmp, res, fp_nan);
+ }
+
+ return res;
+}
+
+/* Fold a call to an unordered comparison function such as
+ __builtin_isgreater(). FNDECL is the FUNCTION_DECL for the function
+ being called and ARG0 and ARG1 are the arguments for the call.
+ UNORDERED_CODE and ORDERED_CODE are comparison codes that give
+ the opposite of the desired result. UNORDERED_CODE is used
+ for modes that can hold NaNs and ORDERED_CODE is used for
+ the rest. */
+
+static tree
+fold_builtin_unordered_cmp (tree fndecl, tree arg0, tree arg1,
+ enum tree_code unordered_code,
+ enum tree_code ordered_code)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum tree_code code;
+ tree type0, type1;
+ enum tree_code code0, code1;
+ tree cmp_type = NULL_TREE;
+
+ type0 = TREE_TYPE (arg0);
+ type1 = TREE_TYPE (arg1);
+
+ code0 = TREE_CODE (type0);
+ code1 = TREE_CODE (type1);
+
+ if (code0 == REAL_TYPE && code1 == REAL_TYPE)
+ /* Choose the wider of two real types. */
+ cmp_type = TYPE_PRECISION (type0) >= TYPE_PRECISION (type1)
+ ? type0 : type1;
+ else if (code0 == REAL_TYPE && code1 == INTEGER_TYPE)
+ cmp_type = type0;
+ else if (code0 == INTEGER_TYPE && code1 == REAL_TYPE)
+ cmp_type = type1;
+
+ arg0 = fold_convert (cmp_type, arg0);
+ arg1 = fold_convert (cmp_type, arg1);
+
+ if (unordered_code == UNORDERED_EXPR)
+ {
+ if (!HONOR_NANS (TYPE_MODE (TREE_TYPE (arg0))))
+ return omit_two_operands (type, integer_zero_node, arg0, arg1);
+ return fold_build2 (UNORDERED_EXPR, type, arg0, arg1);
+ }
+
+ code = HONOR_NANS (TYPE_MODE (TREE_TYPE (arg0))) ? unordered_code
+ : ordered_code;
+ return fold_build1 (TRUTH_NOT_EXPR, type,
+ fold_build2 (code, type, arg0, arg1));
+}
+
+/* Fold a call to built-in function FNDECL with 0 arguments.
+ IGNORE is true if the result of the function call is ignored. This
+ function returns NULL_TREE if no simplification was possible. */
+
+static tree
+fold_builtin_0 (tree fndecl, bool ignore ATTRIBUTE_UNUSED)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ switch (fcode)
+ {
+ CASE_FLT_FN (BUILT_IN_INF):
+ case BUILT_IN_INFD32:
+ case BUILT_IN_INFD64:
+ case BUILT_IN_INFD128:
+ return fold_builtin_inf (type, true);
+
+ CASE_FLT_FN (BUILT_IN_HUGE_VAL):
+ return fold_builtin_inf (type, false);
+
+ case BUILT_IN_CLASSIFY_TYPE:
+ return fold_builtin_classify_type (NULL_TREE);
+
+ default:
+ break;
+ }
+ return NULL_TREE;
+}
+
+/* Fold a call to built-in function FNDECL with 1 argument, ARG0.
+ IGNORE is true if the result of the function call is ignored. This
+ function returns NULL_TREE if no simplification was possible. */
+
+static tree
+fold_builtin_1 (tree fndecl, tree arg0, bool ignore)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ switch (fcode)
+ {
+
+ case BUILT_IN_CONSTANT_P:
+ {
+ tree val = fold_builtin_constant_p (arg0);
+
+ /* Gimplification will pull the CALL_EXPR for the builtin out of
+ an if condition. When not optimizing, we'll not CSE it back.
+ To avoid link error types of regressions, return false now. */
+ if (!val && !optimize)
+ val = integer_zero_node;
+
+ return val;
+ }
+
+ case BUILT_IN_CLASSIFY_TYPE:
+ return fold_builtin_classify_type (arg0);
+
+ case BUILT_IN_STRLEN:
+ return fold_builtin_strlen (type, arg0);
+
+ CASE_FLT_FN (BUILT_IN_FABS):
+ return fold_builtin_fabs (arg0, type);
+
+ case BUILT_IN_ABS:
+ case BUILT_IN_LABS:
+ case BUILT_IN_LLABS:
+ case BUILT_IN_IMAXABS:
+ return fold_builtin_abs (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_CONJ):
+ if (validate_arg (arg0, COMPLEX_TYPE))
+ return fold_build1 (CONJ_EXPR, type, arg0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_CREAL):
+ if (validate_arg (arg0, COMPLEX_TYPE))
+ return non_lvalue (fold_build1 (REALPART_EXPR, type, arg0));;
+ break;
+
+ CASE_FLT_FN (BUILT_IN_CIMAG):
+ if (validate_arg (arg0, COMPLEX_TYPE))
+ return non_lvalue (fold_build1 (IMAGPART_EXPR, type, arg0));
+ break;
+
+ CASE_FLT_FN (BUILT_IN_CCOS):
+ CASE_FLT_FN (BUILT_IN_CCOSH):
+ /* These functions are "even", i.e. f(x) == f(-x). */
+ if (validate_arg (arg0, COMPLEX_TYPE))
+ {
+ tree narg = fold_strip_sign_ops (arg0);
+ if (narg)
+ return build_call_expr (fndecl, 1, narg);
+ }
+ break;
+
+ CASE_FLT_FN (BUILT_IN_CABS):
+ return fold_builtin_cabs (arg0, type, fndecl);
+
+ CASE_FLT_FN (BUILT_IN_CARG):
+ return fold_builtin_carg (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_SQRT):
+ return fold_builtin_sqrt (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_CBRT):
+ return fold_builtin_cbrt (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_ASIN):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_asin,
+ &dconstm1, &dconst1, true);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ACOS):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_acos,
+ &dconstm1, &dconst1, true);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ATAN):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_atan, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ASINH):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_asinh, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ACOSH):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_acosh,
+ &dconst1, NULL, true);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ATANH):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_atanh,
+ &dconstm1, &dconst1, false);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_SIN):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_sin, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_COS):
+ return fold_builtin_cos (arg0, type, fndecl);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_TAN):
+ return fold_builtin_tan (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_CEXP):
+ return fold_builtin_cexp (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_CEXPI):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_sincos (arg0, NULL_TREE, NULL_TREE);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_SINH):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_sinh, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_COSH):
+ return fold_builtin_cosh (arg0, type, fndecl);
+
+ CASE_FLT_FN (BUILT_IN_TANH):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_tanh, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ERF):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_erf, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ERFC):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_erfc, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_TGAMMA):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_gamma, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_EXP):
+ return fold_builtin_exponent (fndecl, arg0, mpfr_exp);
+
+ CASE_FLT_FN (BUILT_IN_EXP2):
+ return fold_builtin_exponent (fndecl, arg0, mpfr_exp2);
+
+ CASE_FLT_FN (BUILT_IN_EXP10):
+ CASE_FLT_FN (BUILT_IN_POW10):
+ return fold_builtin_exponent (fndecl, arg0, mpfr_exp10);
+
+ CASE_FLT_FN (BUILT_IN_EXPM1):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_expm1, NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_LOG):
+ return fold_builtin_logarithm (fndecl, arg0, mpfr_log);
+
+ CASE_FLT_FN (BUILT_IN_LOG2):
+ return fold_builtin_logarithm (fndecl, arg0, mpfr_log2);
+
+ CASE_FLT_FN (BUILT_IN_LOG10):
+ return fold_builtin_logarithm (fndecl, arg0, mpfr_log10);
+
+ CASE_FLT_FN (BUILT_IN_LOG1P):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_log1p,
+ &dconstm1, NULL, false);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_J0):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_j0,
+ NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_J1):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_j1,
+ NULL, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_Y0):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_y0,
+ &dconst0, NULL, false);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_Y1):
+ if (validate_arg (arg0, REAL_TYPE))
+ return do_mpfr_arg1 (arg0, type, mpfr_y1,
+ &dconst0, NULL, false);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_NAN):
+ case BUILT_IN_NAND32:
+ case BUILT_IN_NAND64:
+ case BUILT_IN_NAND128:
+ return fold_builtin_nan (arg0, type, true);
+
+ CASE_FLT_FN (BUILT_IN_NANS):
+ return fold_builtin_nan (arg0, type, false);
+
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ return fold_builtin_floor (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ return fold_builtin_ceil (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ return fold_builtin_trunc (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ return fold_builtin_round (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ CASE_FLT_FN (BUILT_IN_RINT):
+ return fold_trunc_transparent_mathfn (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_LCEIL):
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ CASE_FLT_FN (BUILT_IN_LROUND):
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ return fold_builtin_int_roundingfn (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_LRINT):
+ CASE_FLT_FN (BUILT_IN_LLRINT):
+ return fold_fixed_mathfn (fndecl, arg0);
+
+ case BUILT_IN_BSWAP32:
+ case BUILT_IN_BSWAP64:
+ return fold_builtin_bswap (fndecl, arg0);
+
+ CASE_INT_FN (BUILT_IN_FFS):
+ CASE_INT_FN (BUILT_IN_CLZ):
+ CASE_INT_FN (BUILT_IN_CTZ):
+ CASE_INT_FN (BUILT_IN_POPCOUNT):
+ CASE_INT_FN (BUILT_IN_PARITY):
+ return fold_builtin_bitop (fndecl, arg0);
+
+ CASE_FLT_FN (BUILT_IN_SIGNBIT):
+ return fold_builtin_signbit (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_SIGNIFICAND):
+ return fold_builtin_significand (arg0, type);
+
+ CASE_FLT_FN (BUILT_IN_ILOGB):
+ CASE_FLT_FN (BUILT_IN_LOGB):
+ return fold_builtin_logb (arg0, type);
+
+ case BUILT_IN_ISASCII:
+ return fold_builtin_isascii (arg0);
+
+ case BUILT_IN_TOASCII:
+ return fold_builtin_toascii (arg0);
+
+ case BUILT_IN_ISDIGIT:
+ return fold_builtin_isdigit (arg0);
+
+ CASE_FLT_FN (BUILT_IN_FINITE):
+ case BUILT_IN_FINITED32:
+ case BUILT_IN_FINITED64:
+ case BUILT_IN_FINITED128:
+ case BUILT_IN_ISFINITE:
+ return fold_builtin_classify (fndecl, arg0, BUILT_IN_ISFINITE);
+
+ CASE_FLT_FN (BUILT_IN_ISINF):
+ case BUILT_IN_ISINFD32:
+ case BUILT_IN_ISINFD64:
+ case BUILT_IN_ISINFD128:
+ return fold_builtin_classify (fndecl, arg0, BUILT_IN_ISINF);
+
+ case BUILT_IN_ISINF_SIGN:
+ return fold_builtin_classify (fndecl, arg0, BUILT_IN_ISINF_SIGN);
+
+ CASE_FLT_FN (BUILT_IN_ISNAN):
+ case BUILT_IN_ISNAND32:
+ case BUILT_IN_ISNAND64:
+ case BUILT_IN_ISNAND128:
+ return fold_builtin_classify (fndecl, arg0, BUILT_IN_ISNAN);
+
+ case BUILT_IN_PRINTF:
+ case BUILT_IN_PRINTF_UNLOCKED:
+ case BUILT_IN_VPRINTF:
+ return fold_builtin_printf (fndecl, arg0, NULL_TREE, ignore, fcode);
+
+ default:
+ break;
+ }
+
+ return NULL_TREE;
+
+}
+
+/* Fold a call to built-in function FNDECL with 2 arguments, ARG0 and ARG1.
+ IGNORE is true if the result of the function call is ignored. This
+ function returns NULL_TREE if no simplification was possible. */
+
+static tree
+fold_builtin_2 (tree fndecl, tree arg0, tree arg1, bool ignore)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+
+ switch (fcode)
+ {
+ CASE_FLT_FN (BUILT_IN_JN):
+ if (validate_arg (arg0, INTEGER_TYPE)
+ && validate_arg (arg1, REAL_TYPE))
+ return do_mpfr_bessel_n (arg0, arg1, type, mpfr_jn, NULL, 0);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_YN):
+ if (validate_arg (arg0, INTEGER_TYPE)
+ && validate_arg (arg1, REAL_TYPE))
+ return do_mpfr_bessel_n (arg0, arg1, type, mpfr_yn,
+ &dconst0, false);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_DREM):
+ CASE_FLT_FN (BUILT_IN_REMAINDER):
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, REAL_TYPE))
+ return do_mpfr_arg2 (arg0, arg1, type, mpfr_remainder);
+ break;
+
+ CASE_FLT_FN_REENT (BUILT_IN_GAMMA): /* GAMMA_R */
+ CASE_FLT_FN_REENT (BUILT_IN_LGAMMA): /* LGAMMA_R */
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, POINTER_TYPE))
+ return do_mpfr_lgamma_r (arg0, arg1, type);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_ATAN2):
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, REAL_TYPE))
+ return do_mpfr_arg2 (arg0, arg1, type, mpfr_atan2);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_FDIM):
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, REAL_TYPE))
+ return do_mpfr_arg2 (arg0, arg1, type, mpfr_dim);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_HYPOT):
+ return fold_builtin_hypot (fndecl, arg0, arg1, type);
+
+ CASE_FLT_FN (BUILT_IN_LDEXP):
+ return fold_builtin_load_exponent (arg0, arg1, type, /*ldexp=*/true);
+ CASE_FLT_FN (BUILT_IN_SCALBN):
+ CASE_FLT_FN (BUILT_IN_SCALBLN):
+ return fold_builtin_load_exponent (arg0, arg1, type, /*ldexp=*/false);
+
+ CASE_FLT_FN (BUILT_IN_FREXP):
+ return fold_builtin_frexp (arg0, arg1, type);
+
+ CASE_FLT_FN (BUILT_IN_MODF):
+ return fold_builtin_modf (arg0, arg1, type);
+
+ case BUILT_IN_BZERO:
+ return fold_builtin_bzero (arg0, arg1, ignore);
+
+ case BUILT_IN_FPUTS:
+ return fold_builtin_fputs (arg0, arg1, ignore, false, NULL_TREE);
+
+ case BUILT_IN_FPUTS_UNLOCKED:
+ return fold_builtin_fputs (arg0, arg1, ignore, true, NULL_TREE);
+
+ case BUILT_IN_STRSTR:
+ return fold_builtin_strstr (arg0, arg1, type);
+
+ case BUILT_IN_STRCAT:
+ return fold_builtin_strcat (arg0, arg1);
+
+ case BUILT_IN_STRSPN:
+ return fold_builtin_strspn (arg0, arg1);
+
+ case BUILT_IN_STRCSPN:
+ return fold_builtin_strcspn (arg0, arg1);
+
+ case BUILT_IN_STRCHR:
+ case BUILT_IN_INDEX:
+ return fold_builtin_strchr (arg0, arg1, type);
+
+ case BUILT_IN_STRRCHR:
+ case BUILT_IN_RINDEX:
+ return fold_builtin_strrchr (arg0, arg1, type);
+
+ case BUILT_IN_STRCPY:
+ return fold_builtin_strcpy (fndecl, arg0, arg1, NULL_TREE);
+
+ case BUILT_IN_STPCPY:
+ if (ignore)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+ if (!fn)
+ break;
+
+ return build_call_expr (fn, 2, arg0, arg1);
+ }
+ break;
+
+ case BUILT_IN_STRCMP:
+ return fold_builtin_strcmp (arg0, arg1);
+
+ case BUILT_IN_STRPBRK:
+ return fold_builtin_strpbrk (arg0, arg1, type);
+
+ case BUILT_IN_EXPECT:
+ return fold_builtin_expect (arg0, arg1);
+
+ CASE_FLT_FN (BUILT_IN_POW):
+ return fold_builtin_pow (fndecl, arg0, arg1, type);
+
+ CASE_FLT_FN (BUILT_IN_POWI):
+ return fold_builtin_powi (fndecl, arg0, arg1, type);
+
+ CASE_FLT_FN (BUILT_IN_COPYSIGN):
+ return fold_builtin_copysign (fndecl, arg0, arg1, type);
+
+ CASE_FLT_FN (BUILT_IN_FMIN):
+ return fold_builtin_fmin_fmax (arg0, arg1, type, /*max=*/false);
+
+ CASE_FLT_FN (BUILT_IN_FMAX):
+ return fold_builtin_fmin_fmax (arg0, arg1, type, /*max=*/true);
+
+ case BUILT_IN_ISGREATER:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNLE_EXPR, LE_EXPR);
+ case BUILT_IN_ISGREATEREQUAL:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNLT_EXPR, LT_EXPR);
+ case BUILT_IN_ISLESS:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNGE_EXPR, GE_EXPR);
+ case BUILT_IN_ISLESSEQUAL:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNGT_EXPR, GT_EXPR);
+ case BUILT_IN_ISLESSGREATER:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNEQ_EXPR, EQ_EXPR);
+ case BUILT_IN_ISUNORDERED:
+ return fold_builtin_unordered_cmp (fndecl, arg0, arg1, UNORDERED_EXPR,
+ NOP_EXPR);
+
+ /* We do the folding for va_start in the expander. */
+ case BUILT_IN_VA_START:
+ break;
+
+ case BUILT_IN_SPRINTF:
+ return fold_builtin_sprintf (arg0, arg1, NULL_TREE, ignore);
+
+ case BUILT_IN_OBJECT_SIZE:
+ return fold_builtin_object_size (arg0, arg1);
+
+ case BUILT_IN_PRINTF:
+ case BUILT_IN_PRINTF_UNLOCKED:
+ case BUILT_IN_VPRINTF:
+ return fold_builtin_printf (fndecl, arg0, arg1, ignore, fcode);
+
+ case BUILT_IN_PRINTF_CHK:
+ case BUILT_IN_VPRINTF_CHK:
+ if (!validate_arg (arg0, INTEGER_TYPE)
+ || TREE_SIDE_EFFECTS (arg0))
+ return NULL_TREE;
+ else
+ return fold_builtin_printf (fndecl, arg1, NULL_TREE, ignore, fcode);
+ break;
+
+ case BUILT_IN_FPRINTF:
+ case BUILT_IN_FPRINTF_UNLOCKED:
+ case BUILT_IN_VFPRINTF:
+ return fold_builtin_fprintf (fndecl, arg0, arg1, NULL_TREE,
+ ignore, fcode);
+
+ default:
+ break;
+ }
+ return NULL_TREE;
+}
+
+/* Fold a call to built-in function FNDECL with 3 arguments, ARG0, ARG1,
+ and ARG2. IGNORE is true if the result of the function call is ignored.
+ This function returns NULL_TREE if no simplification was possible. */
+
+static tree
+fold_builtin_3 (tree fndecl, tree arg0, tree arg1, tree arg2, bool ignore)
+{
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ switch (fcode)
+ {
+
+ CASE_FLT_FN (BUILT_IN_SINCOS):
+ return fold_builtin_sincos (arg0, arg1, arg2);
+
+ CASE_FLT_FN (BUILT_IN_FMA):
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, REAL_TYPE)
+ && validate_arg(arg2, REAL_TYPE))
+ return do_mpfr_arg3 (arg0, arg1, arg2, type, mpfr_fma);
+ break;
+
+ CASE_FLT_FN (BUILT_IN_REMQUO):
+ if (validate_arg (arg0, REAL_TYPE)
+ && validate_arg(arg1, REAL_TYPE)
+ && validate_arg(arg2, POINTER_TYPE))
+ return do_mpfr_remquo (arg0, arg1, arg2);
+ break;
+
+ case BUILT_IN_MEMSET:
+ return fold_builtin_memset (arg0, arg1, arg2, type, ignore);
+
+ case BUILT_IN_BCOPY:
+ return fold_builtin_memory_op (arg1, arg0, arg2, void_type_node, true, /*endp=*/3);
+
+ case BUILT_IN_MEMCPY:
+ return fold_builtin_memory_op (arg0, arg1, arg2, type, ignore, /*endp=*/0);
+
+ case BUILT_IN_MEMPCPY:
+ return fold_builtin_memory_op (arg0, arg1, arg2, type, ignore, /*endp=*/1);
+
+ case BUILT_IN_MEMMOVE:
+ return fold_builtin_memory_op (arg0, arg1, arg2, type, ignore, /*endp=*/3);
+
+ case BUILT_IN_STRNCAT:
+ return fold_builtin_strncat (arg0, arg1, arg2);
+
+ case BUILT_IN_STRNCPY:
+ return fold_builtin_strncpy (fndecl, arg0, arg1, arg2, NULL_TREE);
+
+ case BUILT_IN_STRNCMP:
+ return fold_builtin_strncmp (arg0, arg1, arg2);
+
+ case BUILT_IN_MEMCHR:
+ return fold_builtin_memchr (arg0, arg1, arg2, type);
+
+ case BUILT_IN_BCMP:
+ case BUILT_IN_MEMCMP:
+ return fold_builtin_memcmp (arg0, arg1, arg2);;
+
+ case BUILT_IN_SPRINTF:
+ return fold_builtin_sprintf (arg0, arg1, arg2, ignore);
+
+ case BUILT_IN_STRCPY_CHK:
+ case BUILT_IN_STPCPY_CHK:
+ return fold_builtin_stxcpy_chk (fndecl, arg0, arg1, arg2, NULL_TREE,
+ ignore, fcode);
+
+ case BUILT_IN_STRCAT_CHK:
+ return fold_builtin_strcat_chk (fndecl, arg0, arg1, arg2);
+
+ case BUILT_IN_PRINTF_CHK:
+ case BUILT_IN_VPRINTF_CHK:
+ if (!validate_arg (arg0, INTEGER_TYPE)
+ || TREE_SIDE_EFFECTS (arg0))
+ return NULL_TREE;
+ else
+ return fold_builtin_printf (fndecl, arg1, arg2, ignore, fcode);
+ break;
+
+ case BUILT_IN_FPRINTF:
+ case BUILT_IN_FPRINTF_UNLOCKED:
+ case BUILT_IN_VFPRINTF:
+ return fold_builtin_fprintf (fndecl, arg0, arg1, arg2, ignore, fcode);
+
+ case BUILT_IN_FPRINTF_CHK:
+ case BUILT_IN_VFPRINTF_CHK:
+ if (!validate_arg (arg1, INTEGER_TYPE)
+ || TREE_SIDE_EFFECTS (arg1))
+ return NULL_TREE;
+ else
+ return fold_builtin_fprintf (fndecl, arg0, arg2, NULL_TREE,
+ ignore, fcode);
+
+ default:
+ break;
+ }
+ return NULL_TREE;
+}
+
+/* Fold a call to built-in function FNDECL with 4 arguments, ARG0, ARG1,
+ ARG2, and ARG3. IGNORE is true if the result of the function call is
+ ignored. This function returns NULL_TREE if no simplification was
+ possible. */
+
+static tree
+fold_builtin_4 (tree fndecl, tree arg0, tree arg1, tree arg2, tree arg3,
+ bool ignore)
+{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+
+ switch (fcode)
+ {
+ case BUILT_IN_MEMCPY_CHK:
+ case BUILT_IN_MEMPCPY_CHK:
+ case BUILT_IN_MEMMOVE_CHK:
+ case BUILT_IN_MEMSET_CHK:
+ return fold_builtin_memory_chk (fndecl, arg0, arg1, arg2, arg3,
+ NULL_TREE, ignore,
+ DECL_FUNCTION_CODE (fndecl));
+
+ case BUILT_IN_STRNCPY_CHK:
+ return fold_builtin_strncpy_chk (arg0, arg1, arg2, arg3, NULL_TREE);
+
+ case BUILT_IN_STRNCAT_CHK:
+ return fold_builtin_strncat_chk (fndecl, arg0, arg1, arg2, arg3);
+
+ case BUILT_IN_FPRINTF_CHK:
+ case BUILT_IN_VFPRINTF_CHK:
+ if (!validate_arg (arg1, INTEGER_TYPE)
+ || TREE_SIDE_EFFECTS (arg1))
+ return NULL_TREE;
+ else
+ return fold_builtin_fprintf (fndecl, arg0, arg2, arg3,
+ ignore, fcode);
+ break;
+
+ default:
+ break;
+ }
+ return NULL_TREE;
+}
+
+/* Fold a call to built-in function FNDECL. ARGS is an array of NARGS
+ arguments, where NARGS <= 4. IGNORE is true if the result of the
+ function call is ignored. This function returns NULL_TREE if no
+ simplification was possible. Note that this only folds builtins with
+ fixed argument patterns. Foldings that do varargs-to-varargs
+ transformations, or that match calls with more than 4 arguments,
+ need to be handled with fold_builtin_varargs instead. */
+
+#define MAX_ARGS_TO_FOLD_BUILTIN 4
+
+static tree
+fold_builtin_n (tree fndecl, tree *args, int nargs, bool ignore)
+{
+ tree ret = NULL_TREE;
+
+ switch (nargs)
+ {
+ case 0:
+ ret = fold_builtin_0 (fndecl, ignore);
+ break;
+ case 1:
+ ret = fold_builtin_1 (fndecl, args[0], ignore);
+ break;
+ case 2:
+ ret = fold_builtin_2 (fndecl, args[0], args[1], ignore);
+ break;
+ case 3:
+ ret = fold_builtin_3 (fndecl, args[0], args[1], args[2], ignore);
+ break;
+ case 4:
+ ret = fold_builtin_4 (fndecl, args[0], args[1], args[2], args[3],
+ ignore);
+ break;
+ default:
+ break;
+ }
+ if (ret)
+ {
+ ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
+ TREE_NO_WARNING (ret) = 1;
+ return ret;
+ }
+ return NULL_TREE;
+}
+
+/* Builtins with folding operations that operate on "..." arguments
+ need special handling; we need to store the arguments in a convenient
+ data structure before attempting any folding. Fortunately there are
+ only a few builtins that fall into this category. FNDECL is the
+ function, EXP is the CALL_EXPR for the call, and IGNORE is true if the
+ result of the function call is ignored. */
+
+static tree
+fold_builtin_varargs (tree fndecl, tree exp, bool ignore ATTRIBUTE_UNUSED)
+{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree ret = NULL_TREE;
+
+ switch (fcode)
+ {
+ case BUILT_IN_SPRINTF_CHK:
+ case BUILT_IN_VSPRINTF_CHK:
+ ret = fold_builtin_sprintf_chk (exp, fcode);
+ break;
+
+ case BUILT_IN_SNPRINTF_CHK:
+ case BUILT_IN_VSNPRINTF_CHK:
+ ret = fold_builtin_snprintf_chk (exp, NULL_TREE, fcode);
+ break;
+
+ case BUILT_IN_FPCLASSIFY:
+ ret = fold_builtin_fpclassify (exp);
+ break;
+
+ default:
+ break;
+ }
+ if (ret)
+ {
+ ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
+ TREE_NO_WARNING (ret) = 1;
+ return ret;
+ }
+ return NULL_TREE;
+}
+
+/* Return true if FNDECL shouldn't be folded right now.
+ If a built-in function has an inline attribute always_inline
+ wrapper, defer folding it after always_inline functions have
+ been inlined, otherwise e.g. -D_FORTIFY_SOURCE checking
+ might not be performed. */
+
+static bool
+avoid_folding_inline_builtin (tree fndecl)
+{
+ return (DECL_DECLARED_INLINE_P (fndecl)
+ && DECL_DISREGARD_INLINE_LIMITS (fndecl)
+ && cfun
+ && !cfun->always_inline_functions_inlined
+ && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fndecl)));
+}
+
+/* A wrapper function for builtin folding that prevents warnings for
+ "statement without effect" and the like, caused by removing the
+ call node earlier than the warning is generated. */
+
+tree
+fold_call_expr (tree exp, bool ignore)
+{
+ tree ret = NULL_TREE;
+ tree fndecl = get_callee_fndecl (exp);
+ if (fndecl
+ && TREE_CODE (fndecl) == FUNCTION_DECL
+ && DECL_BUILT_IN (fndecl)
+ /* If CALL_EXPR_VA_ARG_PACK is set, the arguments aren't finalized
+ yet. Defer folding until we see all the arguments
+ (after inlining). */
+ && !CALL_EXPR_VA_ARG_PACK (exp))
+ {
+ int nargs = call_expr_nargs (exp);
+
+ /* Before gimplification CALL_EXPR_VA_ARG_PACK is not set, but
+ instead last argument is __builtin_va_arg_pack (). Defer folding
+ even in that case, until arguments are finalized. */
+ if (nargs && TREE_CODE (CALL_EXPR_ARG (exp, nargs - 1)) == CALL_EXPR)
+ {
+ tree fndecl2 = get_callee_fndecl (CALL_EXPR_ARG (exp, nargs - 1));
+ if (fndecl2
+ && TREE_CODE (fndecl2) == FUNCTION_DECL
+ && DECL_BUILT_IN_CLASS (fndecl2) == BUILT_IN_NORMAL
+ && DECL_FUNCTION_CODE (fndecl2) == BUILT_IN_VA_ARG_PACK)
+ return NULL_TREE;
+ }
+
+ if (avoid_folding_inline_builtin (fndecl))
+ return NULL_TREE;
+
+ /* FIXME: Don't use a list in this interface. */
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ return targetm.fold_builtin (fndecl, CALL_EXPR_ARGS (exp), ignore);
+ else
+ {
+ if (nargs <= MAX_ARGS_TO_FOLD_BUILTIN)
+ {
+ tree *args = CALL_EXPR_ARGP (exp);
+ ret = fold_builtin_n (fndecl, args, nargs, ignore);
+ }
+ if (!ret)
+ ret = fold_builtin_varargs (fndecl, exp, ignore);
+ if (ret)
+ {
+ /* Propagate location information from original call to
+ expansion of builtin. Otherwise things like
+ maybe_emit_chk_warning, that operate on the expansion
+ of a builtin, will use the wrong location information. */
+ if (CAN_HAVE_LOCATION_P (exp) && EXPR_HAS_LOCATION (exp))
+ {
+ tree realret = ret;
+ if (TREE_CODE (ret) == NOP_EXPR)
+ realret = TREE_OPERAND (ret, 0);
+ if (CAN_HAVE_LOCATION_P (realret)
+ && !EXPR_HAS_LOCATION (realret))
+ SET_EXPR_LOCATION (realret, EXPR_LOCATION (exp));
+ return realret;
+ }
+ return ret;
+ }
+ }
+ }
+ return NULL_TREE;
+}
+
+/* Conveniently construct a function call expression. FNDECL names the
+ function to be called and ARGLIST is a TREE_LIST of arguments. */
+
+tree
+build_function_call_expr (tree fndecl, tree arglist)
+{
+ tree fntype = TREE_TYPE (fndecl);
+ tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
+ int n = list_length (arglist);
+ tree *argarray = (tree *) alloca (n * sizeof (tree));
+ int i;
+
+ for (i = 0; i < n; i++, arglist = TREE_CHAIN (arglist))
+ argarray[i] = TREE_VALUE (arglist);
+ return fold_builtin_call_array (TREE_TYPE (fntype), fn, n, argarray);
+}
+
+/* Conveniently construct a function call expression. FNDECL names the
+ function to be called, N is the number of arguments, and the "..."
+ parameters are the argument expressions. */
+
+tree
+build_call_expr (tree fndecl, int n, ...)
+{
+ va_list ap;
+ tree fntype = TREE_TYPE (fndecl);
+ tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
+ tree *argarray = (tree *) alloca (n * sizeof (tree));
+ int i;
+
+ va_start (ap, n);
+ for (i = 0; i < n; i++)
+ argarray[i] = va_arg (ap, tree);
+ va_end (ap);
+ return fold_builtin_call_array (TREE_TYPE (fntype), fn, n, argarray);
+}
+
+/* Construct a CALL_EXPR with type TYPE with FN as the function expression.
+ N arguments are passed in the array ARGARRAY. */
+
+tree
+fold_builtin_call_array (tree type,
+ tree fn,
+ int n,
+ tree *argarray)
+{
+ tree ret = NULL_TREE;
+ int i;
+ tree exp;
+
+ if (TREE_CODE (fn) == ADDR_EXPR)
+ {
+ tree fndecl = TREE_OPERAND (fn, 0);
+ if (TREE_CODE (fndecl) == FUNCTION_DECL
+ && DECL_BUILT_IN (fndecl))
+ {
+ /* If last argument is __builtin_va_arg_pack (), arguments to this
+ function are not finalized yet. Defer folding until they are. */
+ if (n && TREE_CODE (argarray[n - 1]) == CALL_EXPR)
+ {
+ tree fndecl2 = get_callee_fndecl (argarray[n - 1]);
+ if (fndecl2
+ && TREE_CODE (fndecl2) == FUNCTION_DECL
+ && DECL_BUILT_IN_CLASS (fndecl2) == BUILT_IN_NORMAL
+ && DECL_FUNCTION_CODE (fndecl2) == BUILT_IN_VA_ARG_PACK)
+ return build_call_array (type, fn, n, argarray);
+ }
+ if (avoid_folding_inline_builtin (fndecl))
+ return build_call_array (type, fn, n, argarray);
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ {
+ tree arglist = NULL_TREE;
+ for (i = n - 1; i >= 0; i--)
+ arglist = tree_cons (NULL_TREE, argarray[i], arglist);
+ ret = targetm.fold_builtin (fndecl, arglist, false);
+ if (ret)
+ return ret;
+ return build_call_array (type, fn, n, argarray);
+ }
+ else if (n <= MAX_ARGS_TO_FOLD_BUILTIN)
+ {
+ /* First try the transformations that don't require consing up
+ an exp. */
+ ret = fold_builtin_n (fndecl, argarray, n, false);
+ if (ret)
+ return ret;
+ }
+
+ /* If we got this far, we need to build an exp. */
+ exp = build_call_array (type, fn, n, argarray);
+ ret = fold_builtin_varargs (fndecl, exp, false);
+ return ret ? ret : exp;
+ }
+ }
+
+ return build_call_array (type, fn, n, argarray);
+}
+
+/* Construct a new CALL_EXPR using the tail of the argument list of EXP
+ along with N new arguments specified as the "..." parameters. SKIP
+ is the number of arguments in EXP to be omitted. This function is used
+ to do varargs-to-varargs transformations. */
+
+static tree
+rewrite_call_expr (tree exp, int skip, tree fndecl, int n, ...)
+{
+ int oldnargs = call_expr_nargs (exp);
+ int nargs = oldnargs - skip + n;
+ tree fntype = TREE_TYPE (fndecl);
+ tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
+ tree *buffer;
+
+ if (n > 0)
+ {
+ int i, j;
+ va_list ap;
+
+ buffer = XALLOCAVEC (tree, nargs);
+ va_start (ap, n);
+ for (i = 0; i < n; i++)
+ buffer[i] = va_arg (ap, tree);
+ va_end (ap);
+ for (j = skip; j < oldnargs; j++, i++)
+ buffer[i] = CALL_EXPR_ARG (exp, j);
+ }
+ else
+ buffer = CALL_EXPR_ARGP (exp) + skip;
+
+ return fold (build_call_array (TREE_TYPE (exp), fn, nargs, buffer));
+}
+
+/* Validate a single argument ARG against a tree code CODE representing
+ a type. */
+
+static bool
+validate_arg (const_tree arg, enum tree_code code)
+{
+ if (!arg)
+ return false;
+ else if (code == POINTER_TYPE)
+ return POINTER_TYPE_P (TREE_TYPE (arg));
+ else if (code == INTEGER_TYPE)
+ return INTEGRAL_TYPE_P (TREE_TYPE (arg));
+ return code == TREE_CODE (TREE_TYPE (arg));
+}
+
+/* This function validates the types of a function call argument list
+ against a specified list of tree_codes. If the last specifier is a 0,
+ that represents an ellipses, otherwise the last specifier must be a
+ VOID_TYPE.
+
+ This is the GIMPLE version of validate_arglist. Eventually we want to
+ completely convert builtins.c to work from GIMPLEs and the tree based
+ validate_arglist will then be removed. */
+
+bool
+validate_gimple_arglist (const_gimple call, ...)
+{
+ enum tree_code code;
+ bool res = 0;
+ va_list ap;
+ const_tree arg;
+ size_t i;
+
+ va_start (ap, call);
+ i = 0;
+
+ do
+ {
+ code = va_arg (ap, enum tree_code);
+ switch (code)
+ {
+ case 0:
+ /* This signifies an ellipses, any further arguments are all ok. */
+ res = true;
+ goto end;
+ case VOID_TYPE:
+ /* This signifies an endlink, if no arguments remain, return
+ true, otherwise return false. */
+ res = (i == gimple_call_num_args (call));
+ goto end;
+ default:
+ /* If no parameters remain or the parameter's code does not
+ match the specified code, return false. Otherwise continue
+ checking any remaining arguments. */
+ arg = gimple_call_arg (call, i++);
+ if (!validate_arg (arg, code))
+ goto end;
+ break;
+ }
+ }
+ while (1);
+
+ /* We need gotos here since we can only have one VA_CLOSE in a
+ function. */
+ end: ;
+ va_end (ap);
+
+ return res;
+}
+
+/* This function validates the types of a function call argument list
+ against a specified list of tree_codes. If the last specifier is a 0,
+ that represents an ellipses, otherwise the last specifier must be a
+ VOID_TYPE. */
+
+bool
+validate_arglist (const_tree callexpr, ...)
+{
+ enum tree_code code;
+ bool res = 0;
+ va_list ap;
+ const_call_expr_arg_iterator iter;
+ const_tree arg;
+
+ va_start (ap, callexpr);
+ init_const_call_expr_arg_iterator (callexpr, &iter);
+
+ do
+ {
+ code = va_arg (ap, enum tree_code);
+ switch (code)
+ {
+ case 0:
+ /* This signifies an ellipses, any further arguments are all ok. */
+ res = true;
+ goto end;
+ case VOID_TYPE:
+ /* This signifies an endlink, if no arguments remain, return
+ true, otherwise return false. */
+ res = !more_const_call_expr_args_p (&iter);
+ goto end;
+ default:
+ /* If no parameters remain or the parameter's code does not
+ match the specified code, return false. Otherwise continue
+ checking any remaining arguments. */
+ arg = next_const_call_expr_arg (&iter);
+ if (!validate_arg (arg, code))
+ goto end;
+ break;
+ }
+ }
+ while (1);
+
+ /* We need gotos here since we can only have one VA_CLOSE in a
+ function. */
+ end: ;
+ va_end (ap);
+
+ return res;
+}
+
+/* Default target-specific builtin expander that does nothing. */
+
+rtx
+default_expand_builtin (tree exp ATTRIBUTE_UNUSED,
+ rtx target ATTRIBUTE_UNUSED,
+ rtx subtarget ATTRIBUTE_UNUSED,
+ enum machine_mode mode ATTRIBUTE_UNUSED,
+ int ignore ATTRIBUTE_UNUSED)
+{
+ return NULL_RTX;
+}
+
+/* Returns true is EXP represents data that would potentially reside
+ in a readonly section. */
+
+static bool
+readonly_data_expr (tree exp)
+{
+ STRIP_NOPS (exp);
+
+ if (TREE_CODE (exp) != ADDR_EXPR)
+ return false;
+
+ exp = get_base_address (TREE_OPERAND (exp, 0));
+ if (!exp)
+ return false;
+
+ /* Make sure we call decl_readonly_section only for trees it
+ can handle (since it returns true for everything it doesn't
+ understand). */
+ if (TREE_CODE (exp) == STRING_CST
+ || TREE_CODE (exp) == CONSTRUCTOR
+ || (TREE_CODE (exp) == VAR_DECL && TREE_STATIC (exp)))
+ return decl_readonly_section (exp, 0);
+ else
+ return false;
+}
+
+/* Simplify a call to the strstr builtin. S1 and S2 are the arguments
+ to the call, and TYPE is its return type.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strstr (tree s1, tree s2, tree type)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ tree fn;
+ const char *p1, *p2;
+
+ p2 = c_getstr (s2);
+ if (p2 == NULL)
+ return NULL_TREE;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ const char *r = strstr (p1, p2);
+ tree tem;
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ tem = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (s1),
+ s1, size_int (r - p1));
+ return fold_convert (type, tem);
+ }
+
+ /* The argument is const char *, and the result is char *, so we need
+ a type conversion here to avoid a warning. */
+ if (p2[0] == '\0')
+ return fold_convert (type, s1);
+
+ if (p2[1] != '\0')
+ return NULL_TREE;
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return NULL_TREE;
+
+ /* New argument list transforming strstr(s1, s2) to
+ strchr(s1, s2[0]). */
+ return build_call_expr (fn, 2, s1, build_int_cst (NULL_TREE, p2[0]));
+ }
+}
+
+/* Simplify a call to the strchr builtin. S1 and S2 are the arguments to
+ the call, and TYPE is its return type.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strchr (tree s1, tree s2, tree type)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p1;
+
+ if (TREE_CODE (s2) != INTEGER_CST)
+ return NULL_TREE;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ char c;
+ const char *r;
+ tree tem;
+
+ if (target_char_cast (s2, &c))
+ return NULL_TREE;
+
+ r = strchr (p1, c);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ tem = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (s1),
+ s1, size_int (r - p1));
+ return fold_convert (type, tem);
+ }
+ return NULL_TREE;
+ }
+}
+
+/* Simplify a call to the strrchr builtin. S1 and S2 are the arguments to
+ the call, and TYPE is its return type.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strrchr (tree s1, tree s2, tree type)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ tree fn;
+ const char *p1;
+
+ if (TREE_CODE (s2) != INTEGER_CST)
+ return NULL_TREE;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ char c;
+ const char *r;
+ tree tem;
+
+ if (target_char_cast (s2, &c))
+ return NULL_TREE;
+
+ r = strrchr (p1, c);
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ tem = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (s1),
+ s1, size_int (r - p1));
+ return fold_convert (type, tem);
+ }
+
+ if (! integer_zerop (s2))
+ return NULL_TREE;
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return NULL_TREE;
+
+ /* Transform strrchr(s1, '\0') to strchr(s1, '\0'). */
+ return build_call_expr (fn, 2, s1, s2);
+ }
+}
+
+/* Simplify a call to the strpbrk builtin. S1 and S2 are the arguments
+ to the call, and TYPE is its return type.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strpbrk (tree s1, tree s2, tree type)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ tree fn;
+ const char *p1, *p2;
+
+ p2 = c_getstr (s2);
+ if (p2 == NULL)
+ return NULL_TREE;
+
+ p1 = c_getstr (s1);
+ if (p1 != NULL)
+ {
+ const char *r = strpbrk (p1, p2);
+ tree tem;
+
+ if (r == NULL)
+ return build_int_cst (TREE_TYPE (s1), 0);
+
+ /* Return an offset into the constant string argument. */
+ tem = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (s1),
+ s1, size_int (r - p1));
+ return fold_convert (type, tem);
+ }
+
+ if (p2[0] == '\0')
+ /* strpbrk(x, "") == NULL.
+ Evaluate and ignore s1 in case it had side-effects. */
+ return omit_one_operand (TREE_TYPE (s1), integer_zero_node, s1);
+
+ if (p2[1] != '\0')
+ return NULL_TREE; /* Really call strpbrk. */
+
+ fn = implicit_built_in_decls[BUILT_IN_STRCHR];
+ if (!fn)
+ return NULL_TREE;
+
+ /* New argument list transforming strpbrk(s1, s2) to
+ strchr(s1, s2[0]). */
+ return build_call_expr (fn, 2, s1, build_int_cst (NULL_TREE, p2[0]));
+ }
+}
+
+/* Simplify a call to the strcat builtin. DST and SRC are the arguments
+ to the call.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strcat (tree dst, tree src)
+{
+ if (!validate_arg (dst, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p = c_getstr (src);
+
+ /* If the string length is zero, return the dst parameter. */
+ if (p && *p == '\0')
+ return dst;
+
+ return NULL_TREE;
+ }
+}
+
+/* Simplify a call to the strncat builtin. DST, SRC, and LEN are the
+ arguments to the call.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strncat (tree dst, tree src, tree len)
+{
+ if (!validate_arg (dst, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p = c_getstr (src);
+
+ /* If the requested length is zero, or the src parameter string
+ length is zero, return the dst parameter. */
+ if (integer_zerop (len) || (p && *p == '\0'))
+ return omit_two_operands (TREE_TYPE (dst), dst, src, len);
+
+ /* If the requested len is greater than or equal to the string
+ length, call strcat. */
+ if (TREE_CODE (len) == INTEGER_CST && p
+ && compare_tree_int (len, strlen (p)) >= 0)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCAT];
+
+ /* If the replacement _DECL isn't initialized, don't do the
+ transformation. */
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 2, dst, src);
+ }
+ return NULL_TREE;
+ }
+}
+
+/* Simplify a call to the strspn builtin. S1 and S2 are the arguments
+ to the call.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strspn (tree s1, tree s2)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
+
+ /* If both arguments are constants, evaluate at compile-time. */
+ if (p1 && p2)
+ {
+ const size_t r = strspn (p1, p2);
+ return size_int (r);
+ }
+
+ /* If either argument is "", return NULL_TREE. */
+ if ((p1 && *p1 == '\0') || (p2 && *p2 == '\0'))
+ /* Evaluate and ignore both arguments in case either one has
+ side-effects. */
+ return omit_two_operands (size_type_node, size_zero_node,
+ s1, s2);
+ return NULL_TREE;
+ }
+}
+
+/* Simplify a call to the strcspn builtin. S1 and S2 are the arguments
+ to the call.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree.
+
+ The simplified form may be a constant or other expression which
+ computes the same value, but in a more efficient manner (including
+ calls to other builtin functions).
+
+ The call may contain arguments which need to be evaluated, but
+ which are not useful to determine the result of the call. In
+ this case we return a chain of COMPOUND_EXPRs. The LHS of each
+ COMPOUND_EXPR will be an argument which must be evaluated.
+ COMPOUND_EXPRs are chained through their RHS. The RHS of the last
+ COMPOUND_EXPR in the chain will contain the tree for the simplified
+ form of the builtin function call. */
+
+static tree
+fold_builtin_strcspn (tree s1, tree s2)
+{
+ if (!validate_arg (s1, POINTER_TYPE)
+ || !validate_arg (s2, POINTER_TYPE))
+ return NULL_TREE;
+ else
+ {
+ const char *p1 = c_getstr (s1), *p2 = c_getstr (s2);
+
+ /* If both arguments are constants, evaluate at compile-time. */
+ if (p1 && p2)
+ {
+ const size_t r = strcspn (p1, p2);
+ return size_int (r);
+ }
+
+ /* If the first argument is "", return NULL_TREE. */
+ if (p1 && *p1 == '\0')
+ {
+ /* Evaluate and ignore argument s2 in case it has
+ side-effects. */
+ return omit_one_operand (size_type_node,
+ size_zero_node, s2);
+ }
+
+ /* If the second argument is "", return __builtin_strlen(s1). */
+ if (p2 && *p2 == '\0')
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRLEN];
+
+ /* If the replacement _DECL isn't initialized, don't do the
+ transformation. */
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 1, s1);
+ }
+ return NULL_TREE;
+ }
+}
+
+/* Fold a call to the fputs builtin. ARG0 and ARG1 are the arguments
+ to the call. IGNORE is true if the value returned
+ by the builtin will be ignored. UNLOCKED is true is true if this
+ actually a call to fputs_unlocked. If LEN in non-NULL, it represents
+ the known length of the string. Return NULL_TREE if no simplification
+ was possible. */
+
+tree
+fold_builtin_fputs (tree arg0, tree arg1, bool ignore, bool unlocked, tree len)
+{
+ /* If we're using an unlocked function, assume the other unlocked
+ functions exist explicitly. */
+ tree const fn_fputc = unlocked ? built_in_decls[BUILT_IN_FPUTC_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FPUTC];
+ tree const fn_fwrite = unlocked ? built_in_decls[BUILT_IN_FWRITE_UNLOCKED]
+ : implicit_built_in_decls[BUILT_IN_FWRITE];
+
+ /* If the return value is used, don't do the transformation. */
+ if (!ignore)
+ return NULL_TREE;
+
+ /* Verify the arguments in the original call. */
+ if (!validate_arg (arg0, POINTER_TYPE)
+ || !validate_arg (arg1, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! len)
+ len = c_strlen (arg0, 0);
+
+ /* Get the length of the string passed to fputs. If the length
+ can't be determined, punt. */
+ if (!len
+ || TREE_CODE (len) != INTEGER_CST)
+ return NULL_TREE;
+
+ switch (compare_tree_int (len, 1))
+ {
+ case -1: /* length is 0, delete the call entirely . */
+ return omit_one_operand (integer_type_node, integer_zero_node, arg1);;
+
+ case 0: /* length is 1, call fputc. */
+ {
+ const char *p = c_getstr (arg0);
+
+ if (p != NULL)
+ {
+ if (fn_fputc)
+ return build_call_expr (fn_fputc, 2,
+ build_int_cst (NULL_TREE, p[0]), arg1);
+ else
+ return NULL_TREE;
+ }
+ }
+ /* FALLTHROUGH */
+ case 1: /* length is greater than 1, call fwrite. */
+ {
+ /* If optimizing for size keep fputs. */
+ if (optimize_function_for_size_p (cfun))
+ return NULL_TREE;
+ /* New argument list transforming fputs(string, stream) to
+ fwrite(string, 1, len, stream). */
+ if (fn_fwrite)
+ return build_call_expr (fn_fwrite, 4, arg0, size_one_node, len, arg1);
+ else
+ return NULL_TREE;
+ }
+ default:
+ gcc_unreachable ();
+ }
+ return NULL_TREE;
+}
+
+/* Fold the next_arg or va_start call EXP. Returns true if there was an error
+ produced. False otherwise. This is done so that we don't output the error
+ or warning twice or three times. */
+
+bool
+fold_builtin_next_arg (tree exp, bool va_start_p)
+{
+ tree fntype = TREE_TYPE (current_function_decl);
+ int nargs = call_expr_nargs (exp);
+ tree arg;
+
+ if (TYPE_ARG_TYPES (fntype) == 0
+ || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (fntype)))
+ == void_type_node))
+ {
+ error ("%<va_start%> used in function with fixed args");
+ return true;
+ }
+
+ if (va_start_p)
+ {
+ if (va_start_p && (nargs != 2))
+ {
+ error ("wrong number of arguments to function %<va_start%>");
+ return true;
+ }
+ arg = CALL_EXPR_ARG (exp, 1);
+ }
+ /* We use __builtin_va_start (ap, 0, 0) or __builtin_next_arg (0, 0)
+ when we checked the arguments and if needed issued a warning. */
+ else
+ {
+ if (nargs == 0)
+ {
+ /* Evidently an out of date version of <stdarg.h>; can't validate
+ va_start's second argument, but can still work as intended. */
+ warning (0, "%<__builtin_next_arg%> called without an argument");
+ return true;
+ }
+ else if (nargs > 1)
+ {
+ error ("wrong number of arguments to function %<__builtin_next_arg%>");
+ return true;
+ }
+ arg = CALL_EXPR_ARG (exp, 0);
+ }
+
+ /* We destructively modify the call to be __builtin_va_start (ap, 0)
+ or __builtin_next_arg (0) the first time we see it, after checking
+ the arguments and if needed issuing a warning. */
+ if (!integer_zerop (arg))
+ {
+ tree last_parm = tree_last (DECL_ARGUMENTS (current_function_decl));
+
+ /* Strip off all nops for the sake of the comparison. This
+ is not quite the same as STRIP_NOPS. It does more.
+ We must also strip off INDIRECT_EXPR for C++ reference
+ parameters. */
+ while (CONVERT_EXPR_P (arg)
+ || TREE_CODE (arg) == INDIRECT_REF)
+ arg = TREE_OPERAND (arg, 0);
+ if (arg != last_parm)
+ {
+ /* FIXME: Sometimes with the tree optimizers we can get the
+ not the last argument even though the user used the last
+ argument. We just warn and set the arg to be the last
+ argument so that we will get wrong-code because of
+ it. */
+ warning (0, "second parameter of %<va_start%> not last named argument");
+ }
+
+ /* Undefined by C99 7.15.1.4p4 (va_start):
+ "If the parameter parmN is declared with the register storage
+ class, with a function or array type, or with a type that is
+ not compatible with the type that results after application of
+ the default argument promotions, the behavior is undefined."
+ */
+ else if (DECL_REGISTER (arg))
+ warning (0, "undefined behaviour when second parameter of "
+ "%<va_start%> is declared with %<register%> storage");
+
+ /* We want to verify the second parameter just once before the tree
+ optimizers are run and then avoid keeping it in the tree,
+ as otherwise we could warn even for correct code like:
+ void foo (int i, ...)
+ { va_list ap; i++; va_start (ap, i); va_end (ap); } */
+ if (va_start_p)
+ CALL_EXPR_ARG (exp, 1) = integer_zero_node;
+ else
+ CALL_EXPR_ARG (exp, 0) = integer_zero_node;
+ }
+ return false;
+}
+
+
+/* Simplify a call to the sprintf builtin with arguments DEST, FMT, and ORIG.
+ ORIG may be null if this is a 2-argument call. We don't attempt to
+ simplify calls with more than 3 arguments.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree. If IGNORED is true, it means that
+ the caller does not use the returned value of the function. */
+
+static tree
+fold_builtin_sprintf (tree dest, tree fmt, tree orig, int ignored)
+{
+ tree call, retval;
+ const char *fmt_str = NULL;
+
+ /* Verify the required arguments in the original call. We deal with two
+ types of sprintf() calls: 'sprintf (str, fmt)' and
+ 'sprintf (dest, "%s", orig)'. */
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+ if (orig && !validate_arg (orig, POINTER_TYPE))
+ return NULL_TREE;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
+
+ call = NULL_TREE;
+ retval = NULL_TREE;
+
+ if (!init_target_chars ())
+ return NULL_TREE;
+
+ /* If the format doesn't contain % args or %%, use strcpy. */
+ if (strchr (fmt_str, target_percent) == NULL)
+ {
+ tree fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+
+ if (!fn)
+ return NULL_TREE;
+
+ /* Don't optimize sprintf (buf, "abc", ptr++). */
+ if (orig)
+ return NULL_TREE;
+
+ /* Convert sprintf (str, fmt) into strcpy (str, fmt) when
+ 'format' is known to contain no % formats. */
+ call = build_call_expr (fn, 2, dest, fmt);
+ if (!ignored)
+ retval = build_int_cst (NULL_TREE, strlen (fmt_str));
+ }
+
+ /* If the format is "%s", use strcpy if the result isn't used. */
+ else if (fmt_str && strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree fn;
+ fn = implicit_built_in_decls[BUILT_IN_STRCPY];
+
+ if (!fn)
+ return NULL_TREE;
+
+ /* Don't crash on sprintf (str1, "%s"). */
+ if (!orig)
+ return NULL_TREE;
+
+ /* Convert sprintf (str1, "%s", str2) into strcpy (str1, str2). */
+ if (!ignored)
+ {
+ retval = c_strlen (orig, 1);
+ if (!retval || TREE_CODE (retval) != INTEGER_CST)
+ return NULL_TREE;
+ }
+ call = build_call_expr (fn, 2, dest, orig);
+ }
+
+ if (call && retval)
+ {
+ retval = fold_convert
+ (TREE_TYPE (TREE_TYPE (implicit_built_in_decls[BUILT_IN_SPRINTF])),
+ retval);
+ return build2 (COMPOUND_EXPR, TREE_TYPE (retval), call, retval);
+ }
+ else
+ return call;
+}
+
+/* Expand a call EXP to __builtin_object_size. */
+
+rtx
+expand_builtin_object_size (tree exp)
+{
+ tree ost;
+ int object_size_type;
+ tree fndecl = get_callee_fndecl (exp);
+
+ if (!validate_arglist (exp, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ {
+ error ("%Kfirst argument of %D must be a pointer, second integer constant",
+ exp, fndecl);
+ expand_builtin_trap ();
+ return const0_rtx;
+ }
+
+ ost = CALL_EXPR_ARG (exp, 1);
+ STRIP_NOPS (ost);
+
+ if (TREE_CODE (ost) != INTEGER_CST
+ || tree_int_cst_sgn (ost) < 0
+ || compare_tree_int (ost, 3) > 0)
+ {
+ error ("%Klast argument of %D is not integer constant between 0 and 3",
+ exp, fndecl);
+ expand_builtin_trap ();
+ return const0_rtx;
+ }
+
+ object_size_type = tree_low_cst (ost, 0);
+
+ return object_size_type < 2 ? constm1_rtx : const0_rtx;
+}
+
+/* Expand EXP, a call to the __mem{cpy,pcpy,move,set}_chk builtin.
+ FCODE is the BUILT_IN_* to use.
+ Return NULL_RTX if we failed; the caller should emit a normal call,
+ otherwise try to get the result in TARGET, if convenient (and in
+ mode MODE if that's convenient). */
+
+static rtx
+expand_builtin_memory_chk (tree exp, rtx target, enum machine_mode mode,
+ enum built_in_function fcode)
+{
+ tree dest, src, len, size;
+
+ if (!validate_arglist (exp,
+ POINTER_TYPE,
+ fcode == BUILT_IN_MEMSET_CHK
+ ? INTEGER_TYPE : POINTER_TYPE,
+ INTEGER_TYPE, INTEGER_TYPE, VOID_TYPE))
+ return NULL_RTX;
+
+ dest = CALL_EXPR_ARG (exp, 0);
+ src = CALL_EXPR_ARG (exp, 1);
+ len = CALL_EXPR_ARG (exp, 2);
+ size = CALL_EXPR_ARG (exp, 3);
+
+ if (! host_integerp (size, 1))
+ return NULL_RTX;
+
+ if (host_integerp (len, 1) || integer_all_onesp (size))
+ {
+ tree fn;
+
+ if (! integer_all_onesp (size) && tree_int_cst_lt (size, len))
+ {
+ warning_at (tree_nonartificial_location (exp),
+ 0, "%Kcall to %D will always overflow destination buffer",
+ exp, get_callee_fndecl (exp));
+ return NULL_RTX;
+ }
+
+ fn = NULL_TREE;
+ /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume
+ mem{cpy,pcpy,move,set} is available. */
+ switch (fcode)
+ {
+ case BUILT_IN_MEMCPY_CHK:
+ fn = built_in_decls[BUILT_IN_MEMCPY];
+ break;
+ case BUILT_IN_MEMPCPY_CHK:
+ fn = built_in_decls[BUILT_IN_MEMPCPY];
+ break;
+ case BUILT_IN_MEMMOVE_CHK:
+ fn = built_in_decls[BUILT_IN_MEMMOVE];
+ break;
+ case BUILT_IN_MEMSET_CHK:
+ fn = built_in_decls[BUILT_IN_MEMSET];
+ break;
+ default:
+ break;
+ }
+
+ if (! fn)
+ return NULL_RTX;
+
+ fn = build_call_expr (fn, 3, dest, src, len);
+ STRIP_TYPE_NOPS (fn);
+ while (TREE_CODE (fn) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (fn, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ fn = TREE_OPERAND (fn, 1);
+ }
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_expr (fn, target, mode, EXPAND_NORMAL);
+ }
+ else if (fcode == BUILT_IN_MEMSET_CHK)
+ return NULL_RTX;
+ else
+ {
+ unsigned int dest_align
+ = get_pointer_alignment (dest, BIGGEST_ALIGNMENT);
+
+ /* If DEST is not a pointer type, call the normal function. */
+ if (dest_align == 0)
+ return NULL_RTX;
+
+ /* If SRC and DEST are the same (and not volatile), do nothing. */
+ if (operand_equal_p (src, dest, 0))
+ {
+ tree expr;
+
+ if (fcode != BUILT_IN_MEMPCPY_CHK)
+ {
+ /* Evaluate and ignore LEN in case it has side-effects. */
+ expand_expr (len, const0_rtx, VOIDmode, EXPAND_NORMAL);
+ return expand_expr (dest, target, mode, EXPAND_NORMAL);
+ }
+
+ expr = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (dest), dest, len);
+ return expand_expr (expr, target, mode, EXPAND_NORMAL);
+ }
+
+ /* __memmove_chk special case. */
+ if (fcode == BUILT_IN_MEMMOVE_CHK)
+ {
+ unsigned int src_align
+ = get_pointer_alignment (src, BIGGEST_ALIGNMENT);
+
+ if (src_align == 0)
+ return NULL_RTX;
+
+ /* If src is categorized for a readonly section we can use
+ normal __memcpy_chk. */
+ if (readonly_data_expr (src))
+ {
+ tree fn = built_in_decls[BUILT_IN_MEMCPY_CHK];
+ if (!fn)
+ return NULL_RTX;
+ fn = build_call_expr (fn, 4, dest, src, len, size);
+ STRIP_TYPE_NOPS (fn);
+ while (TREE_CODE (fn) == COMPOUND_EXPR)
+ {
+ expand_expr (TREE_OPERAND (fn, 0), const0_rtx, VOIDmode,
+ EXPAND_NORMAL);
+ fn = TREE_OPERAND (fn, 1);
+ }
+ if (TREE_CODE (fn) == CALL_EXPR)
+ CALL_EXPR_TAILCALL (fn) = CALL_EXPR_TAILCALL (exp);
+ return expand_expr (fn, target, mode, EXPAND_NORMAL);
+ }
+ }
+ return NULL_RTX;
+ }
+}
+
+/* Emit warning if a buffer overflow is detected at compile time. */
+
+static void
+maybe_emit_chk_warning (tree exp, enum built_in_function fcode)
+{
+ int is_strlen = 0;
+ tree len, size;
+ location_t loc = tree_nonartificial_location (exp);
+
+ switch (fcode)
+ {
+ case BUILT_IN_STRCPY_CHK:
+ case BUILT_IN_STPCPY_CHK:
+ /* For __strcat_chk the warning will be emitted only if overflowing
+ by at least strlen (dest) + 1 bytes. */
+ case BUILT_IN_STRCAT_CHK:
+ len = CALL_EXPR_ARG (exp, 1);
+ size = CALL_EXPR_ARG (exp, 2);
+ is_strlen = 1;
break;
+ case BUILT_IN_STRNCAT_CHK:
+ case BUILT_IN_STRNCPY_CHK:
+ len = CALL_EXPR_ARG (exp, 2);
+ size = CALL_EXPR_ARG (exp, 3);
+ break;
+ case BUILT_IN_SNPRINTF_CHK:
+ case BUILT_IN_VSNPRINTF_CHK:
+ len = CALL_EXPR_ARG (exp, 1);
+ size = CALL_EXPR_ARG (exp, 3);
+ break;
+ default:
+ gcc_unreachable ();
+ }
+
+ if (!len || !size)
+ return;
+
+ if (! host_integerp (size, 1) || integer_all_onesp (size))
+ return;
+
+ if (is_strlen)
+ {
+ len = c_strlen (len, 1);
+ if (! len || ! host_integerp (len, 1) || tree_int_cst_lt (len, size))
+ return;
+ }
+ else if (fcode == BUILT_IN_STRNCAT_CHK)
+ {
+ tree src = CALL_EXPR_ARG (exp, 1);
+ if (! src || ! host_integerp (len, 1) || tree_int_cst_lt (len, size))
+ return;
+ src = c_strlen (src, 1);
+ if (! src || ! host_integerp (src, 1))
+ {
+ warning_at (loc, 0, "%Kcall to %D might overflow destination buffer",
+ exp, get_callee_fndecl (exp));
+ return;
+ }
+ else if (tree_int_cst_lt (src, size))
+ return;
+ }
+ else if (! host_integerp (len, 1) || ! tree_int_cst_lt (size, len))
+ return;
+
+ warning_at (loc, 0, "%Kcall to %D will always overflow destination buffer",
+ exp, get_callee_fndecl (exp));
+}
+
+/* Emit warning if a buffer overflow is detected at compile time
+ in __sprintf_chk/__vsprintf_chk calls. */
+
+static void
+maybe_emit_sprintf_chk_warning (tree exp, enum built_in_function fcode)
+{
+ tree dest, size, len, fmt, flag;
+ const char *fmt_str;
+ int nargs = call_expr_nargs (exp);
+
+ /* Verify the required arguments in the original call. */
+
+ if (nargs < 4)
+ return;
+ dest = CALL_EXPR_ARG (exp, 0);
+ flag = CALL_EXPR_ARG (exp, 1);
+ size = CALL_EXPR_ARG (exp, 2);
+ fmt = CALL_EXPR_ARG (exp, 3);
+
+ if (! host_integerp (size, 1) || integer_all_onesp (size))
+ return;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return;
+
+ if (!init_target_chars ())
+ return;
+
+ /* If the format doesn't contain % args or %%, we know its size. */
+ if (strchr (fmt_str, target_percent) == 0)
+ len = build_int_cstu (size_type_node, strlen (fmt_str));
+ /* If the format is "%s" and first ... argument is a string literal,
+ we know it too. */
+ else if (fcode == BUILT_IN_SPRINTF_CHK
+ && strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree arg;
+
+ if (nargs < 5)
+ return;
+ arg = CALL_EXPR_ARG (exp, 4);
+ if (! POINTER_TYPE_P (TREE_TYPE (arg)))
+ return;
+
+ len = c_strlen (arg, 1);
+ if (!len || ! host_integerp (len, 1))
+ return;
+ }
+ else
+ return;
+
+ if (! tree_int_cst_lt (len, size))
+ warning_at (tree_nonartificial_location (exp),
+ 0, "%Kcall to %D will always overflow destination buffer",
+ exp, get_callee_fndecl (exp));
+}
+
+/* Emit warning if a free is called with address of a variable. */
+
+static void
+maybe_emit_free_warning (tree exp)
+{
+ tree arg = CALL_EXPR_ARG (exp, 0);
+
+ STRIP_NOPS (arg);
+ if (TREE_CODE (arg) != ADDR_EXPR)
+ return;
+
+ arg = get_base_address (TREE_OPERAND (arg, 0));
+ if (arg == NULL || INDIRECT_REF_P (arg))
+ return;
+
+ if (SSA_VAR_P (arg))
+ warning_at (tree_nonartificial_location (exp),
+ 0, "%Kattempt to free a non-heap object %qD", exp, arg);
+ else
+ warning_at (tree_nonartificial_location (exp),
+ 0, "%Kattempt to free a non-heap object", exp);
+}
+
+/* Fold a call to __builtin_object_size with arguments PTR and OST,
+ if possible. */
+
+tree
+fold_builtin_object_size (tree ptr, tree ost)
+{
+ tree ret = NULL_TREE;
+ int object_size_type;
+
+ if (!validate_arg (ptr, POINTER_TYPE)
+ || !validate_arg (ost, INTEGER_TYPE))
+ return NULL_TREE;
+
+ STRIP_NOPS (ost);
+
+ if (TREE_CODE (ost) != INTEGER_CST
+ || tree_int_cst_sgn (ost) < 0
+ || compare_tree_int (ost, 3) > 0)
+ return NULL_TREE;
+
+ object_size_type = tree_low_cst (ost, 0);
+
+ /* __builtin_object_size doesn't evaluate side-effects in its arguments;
+ if there are any side-effects, it returns (size_t) -1 for types 0 and 1
+ and (size_t) 0 for types 2 and 3. */
+ if (TREE_SIDE_EFFECTS (ptr))
+ return build_int_cst_type (size_type_node, object_size_type < 2 ? -1 : 0);
+
+ if (TREE_CODE (ptr) == ADDR_EXPR)
+ ret = build_int_cstu (size_type_node,
+ compute_builtin_object_size (ptr, object_size_type));
+
+ else if (TREE_CODE (ptr) == SSA_NAME)
+ {
+ unsigned HOST_WIDE_INT bytes;
+
+ /* If object size is not known yet, delay folding until
+ later. Maybe subsequent passes will help determining
+ it. */
+ bytes = compute_builtin_object_size (ptr, object_size_type);
+ if (bytes != (unsigned HOST_WIDE_INT) (object_size_type < 2
+ ? -1 : 0))
+ ret = build_int_cstu (size_type_node, bytes);
+ }
+
+ if (ret)
+ {
+ unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (ret);
+ HOST_WIDE_INT high = TREE_INT_CST_HIGH (ret);
+ if (fit_double_type (low, high, &low, &high, TREE_TYPE (ret)))
+ ret = NULL_TREE;
+ }
+
+ return ret;
+}
+
+/* Fold a call to the __mem{cpy,pcpy,move,set}_chk builtin.
+ DEST, SRC, LEN, and SIZE are the arguments to the call.
+ IGNORE is true, if return value can be ignored. FCODE is the BUILT_IN_*
+ code of the builtin. If MAXLEN is not NULL, it is maximum length
+ passed as third argument. */
+
+tree
+fold_builtin_memory_chk (tree fndecl,
+ tree dest, tree src, tree len, tree size,
+ tree maxlen, bool ignore,
+ enum built_in_function fcode)
+{
+ tree fn;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src,
+ (fcode == BUILT_IN_MEMSET_CHK
+ ? INTEGER_TYPE : POINTER_TYPE))
+ || !validate_arg (len, INTEGER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If SRC and DEST are the same (and not volatile), return DEST
+ (resp. DEST+LEN for __mempcpy_chk). */
+ if (fcode != BUILT_IN_MEMSET_CHK && operand_equal_p (src, dest, 0))
+ {
+ if (fcode != BUILT_IN_MEMPCPY_CHK)
+ return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl)), dest, len);
+ else
+ {
+ tree temp = fold_build2 (POINTER_PLUS_EXPR, TREE_TYPE (dest), dest, len);
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), temp);
+ }
+ }
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ if (! host_integerp (len, 1))
+ {
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ {
+ if (fcode == BUILT_IN_MEMPCPY_CHK && ignore)
+ {
+ /* (void) __mempcpy_chk () can be optimized into
+ (void) __memcpy_chk (). */
+ fn = built_in_decls[BUILT_IN_MEMCPY_CHK];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 4, dest, src, len, size);
+ }
+ return NULL_TREE;
+ }
+ }
+ else
+ maxlen = len;
+
+ if (tree_int_cst_lt (size, maxlen))
+ return NULL_TREE;
+ }
- case BUILT_IN_FMOD:
+ fn = NULL_TREE;
+ /* If __builtin_mem{cpy,pcpy,move,set}_chk is used, assume
+ mem{cpy,pcpy,move,set} is available. */
+ switch (fcode)
+ {
+ case BUILT_IN_MEMCPY_CHK:
+ fn = built_in_decls[BUILT_IN_MEMCPY];
+ break;
+ case BUILT_IN_MEMPCPY_CHK:
+ fn = built_in_decls[BUILT_IN_MEMPCPY];
+ break;
+ case BUILT_IN_MEMMOVE_CHK:
+ fn = built_in_decls[BUILT_IN_MEMMOVE];
break;
+ case BUILT_IN_MEMSET_CHK:
+ fn = built_in_decls[BUILT_IN_MEMSET];
+ break;
+ default:
+ break;
+ }
- case BUILT_IN_APPLY_ARGS:
- return expand_builtin_apply_args ();
+ if (!fn)
+ return NULL_TREE;
- /* __builtin_apply (FUNCTION, ARGUMENTS, ARGSIZE) invokes
- FUNCTION with a copy of the parameters described by
- ARGUMENTS, and ARGSIZE. It returns a block of memory
- allocated on the stack into which is stored all the registers
- that might possibly be used for returning the result of a
- function. ARGUMENTS is the value returned by
- __builtin_apply_args. ARGSIZE is the number of bytes of
- arguments that must be copied. ??? How should this value be
- computed? We'll also need a safe worst case value for varargs
- functions. */
- case BUILT_IN_APPLY:
- if (!validate_arglist (arglist, POINTER_TYPE,
- POINTER_TYPE, INTEGER_TYPE, VOID_TYPE)
- && !validate_arglist (arglist, REFERENCE_TYPE,
- POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- return const0_rtx;
+ return build_call_expr (fn, 3, dest, src, len);
+}
+
+/* Fold a call to the __st[rp]cpy_chk builtin.
+ DEST, SRC, and SIZE are the arguments to the call.
+ IGNORE is true if return value can be ignored. FCODE is the BUILT_IN_*
+ code of the builtin. If MAXLEN is not NULL, it is maximum length of
+ strings passed as second argument. */
+
+tree
+fold_builtin_stxcpy_chk (tree fndecl, tree dest, tree src, tree size,
+ tree maxlen, bool ignore,
+ enum built_in_function fcode)
+{
+ tree len, fn;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ /* If SRC and DEST are the same (and not volatile), return DEST. */
+ if (fcode == BUILT_IN_STRCPY_CHK && operand_equal_p (src, dest, 0))
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), dest);
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ len = c_strlen (src, 1);
+ if (! len || ! host_integerp (len, 1))
+ {
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ {
+ if (fcode == BUILT_IN_STPCPY_CHK)
+ {
+ if (! ignore)
+ return NULL_TREE;
+
+ /* If return value of __stpcpy_chk is ignored,
+ optimize into __strcpy_chk. */
+ fn = built_in_decls[BUILT_IN_STRCPY_CHK];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 3, dest, src, size);
+ }
+
+ if (! len || TREE_SIDE_EFFECTS (len))
+ return NULL_TREE;
+
+ /* If c_strlen returned something, but not a constant,
+ transform __strcpy_chk into __memcpy_chk. */
+ fn = built_in_decls[BUILT_IN_MEMCPY_CHK];
+ if (!fn)
+ return NULL_TREE;
+
+ len = size_binop (PLUS_EXPR, len, ssize_int (1));
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)),
+ build_call_expr (fn, 4,
+ dest, src, len, size));
+ }
+ }
else
+ maxlen = len;
+
+ if (! tree_int_cst_lt (maxlen, size))
+ return NULL_TREE;
+ }
+
+ /* If __builtin_st{r,p}cpy_chk is used, assume st{r,p}cpy is available. */
+ fn = built_in_decls[fcode == BUILT_IN_STPCPY_CHK
+ ? BUILT_IN_STPCPY : BUILT_IN_STRCPY];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 2, dest, src);
+}
+
+/* Fold a call to the __strncpy_chk builtin. DEST, SRC, LEN, and SIZE
+ are the arguments to the call. If MAXLEN is not NULL, it is maximum
+ length passed as third argument. */
+
+tree
+fold_builtin_strncpy_chk (tree dest, tree src, tree len, tree size,
+ tree maxlen)
+{
+ tree fn;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (len, INTEGER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ if (! host_integerp (len, 1))
{
- int i;
- tree t;
- rtx ops[3];
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ return NULL_TREE;
+ }
+ else
+ maxlen = len;
- for (t = arglist, i = 0; t; t = TREE_CHAIN (t), i++)
- ops[i] = expand_expr (TREE_VALUE (t), NULL_RTX, VOIDmode, 0);
+ if (tree_int_cst_lt (size, maxlen))
+ return NULL_TREE;
+ }
- return expand_builtin_apply (ops[0], ops[1], ops[2]);
+ /* If __builtin_strncpy_chk is used, assume strncpy is available. */
+ fn = built_in_decls[BUILT_IN_STRNCPY];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 3, dest, src, len);
+}
+
+/* Fold a call to the __strcat_chk builtin FNDECL. DEST, SRC, and SIZE
+ are the arguments to the call. */
+
+static tree
+fold_builtin_strcat_chk (tree fndecl, tree dest, tree src, tree size)
+{
+ tree fn;
+ const char *p;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ p = c_getstr (src);
+ /* If the SRC parameter is "", return DEST. */
+ if (p && *p == '\0')
+ return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl)), dest, src);
+
+ if (! host_integerp (size, 1) || ! integer_all_onesp (size))
+ return NULL_TREE;
+
+ /* If __builtin_strcat_chk is used, assume strcat is available. */
+ fn = built_in_decls[BUILT_IN_STRCAT];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 2, dest, src);
+}
+
+/* Fold a call to the __strncat_chk builtin with arguments DEST, SRC,
+ LEN, and SIZE. */
+
+static tree
+fold_builtin_strncat_chk (tree fndecl,
+ tree dest, tree src, tree len, tree size)
+{
+ tree fn;
+ const char *p;
+
+ if (!validate_arg (dest, POINTER_TYPE)
+ || !validate_arg (src, POINTER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE)
+ || !validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+
+ p = c_getstr (src);
+ /* If the SRC parameter is "" or if LEN is 0, return DEST. */
+ if (p && *p == '\0')
+ return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl)), dest, len);
+ else if (integer_zerop (len))
+ return omit_one_operand (TREE_TYPE (TREE_TYPE (fndecl)), dest, src);
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ tree src_len = c_strlen (src, 1);
+ if (src_len
+ && host_integerp (src_len, 1)
+ && host_integerp (len, 1)
+ && ! tree_int_cst_lt (len, src_len))
+ {
+ /* If LEN >= strlen (SRC), optimize into __strcat_chk. */
+ fn = built_in_decls[BUILT_IN_STRCAT_CHK];
+ if (!fn)
+ return NULL_TREE;
+
+ return build_call_expr (fn, 3, dest, src, size);
}
+ return NULL_TREE;
+ }
- /* __builtin_return (RESULT) causes the function to return the
- value described by RESULT. RESULT is address of the block of
- memory returned by __builtin_apply. */
- case BUILT_IN_RETURN:
- if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
- expand_builtin_return (expand_expr (TREE_VALUE (arglist),
- NULL_RTX, VOIDmode, 0));
- return const0_rtx;
+ /* If __builtin_strncat_chk is used, assume strncat is available. */
+ fn = built_in_decls[BUILT_IN_STRNCAT];
+ if (!fn)
+ return NULL_TREE;
- case BUILT_IN_SAVEREGS:
- return expand_builtin_saveregs ();
+ return build_call_expr (fn, 3, dest, src, len);
+}
- case BUILT_IN_ARGS_INFO:
- return expand_builtin_args_info (exp);
+/* Fold a call EXP to __{,v}sprintf_chk. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SPRINTF_CHK or BUILT_IN_VSPRINTF_CHK. */
- /* Return the address of the first anonymous stack arg. */
- case BUILT_IN_NEXT_ARG:
- return expand_builtin_next_arg (arglist);
+static tree
+fold_builtin_sprintf_chk (tree exp, enum built_in_function fcode)
+{
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+ int nargs = call_expr_nargs (exp);
+
+ /* Verify the required arguments in the original call. */
+ if (nargs < 4)
+ return NULL_TREE;
+ dest = CALL_EXPR_ARG (exp, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ flag = CALL_EXPR_ARG (exp, 1);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = CALL_EXPR_ARG (exp, 2);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = CALL_EXPR_ARG (exp, 3);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ len = NULL_TREE;
+
+ if (!init_target_chars ())
+ return NULL_TREE;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str != NULL)
+ {
+ /* If the format doesn't contain % args or %%, we know the size. */
+ if (strchr (fmt_str, target_percent) == 0)
+ {
+ if (fcode != BUILT_IN_SPRINTF_CHK || nargs == 4)
+ len = build_int_cstu (size_type_node, strlen (fmt_str));
+ }
+ /* If the format is "%s" and first ... argument is a string literal,
+ we know the size too. */
+ else if (fcode == BUILT_IN_SPRINTF_CHK
+ && strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree arg;
- case BUILT_IN_CLASSIFY_TYPE:
- return expand_builtin_classify_type (arglist);
+ if (nargs == 5)
+ {
+ arg = CALL_EXPR_ARG (exp, 4);
+ if (validate_arg (arg, POINTER_TYPE))
+ {
+ len = c_strlen (arg, 1);
+ if (! len || ! host_integerp (len, 1))
+ len = NULL_TREE;
+ }
+ }
+ }
+ }
- case BUILT_IN_CONSTANT_P:
- return expand_builtin_constant_p (exp);
+ if (! integer_all_onesp (size))
+ {
+ if (! len || ! tree_int_cst_lt (len, size))
+ return NULL_TREE;
+ }
- case BUILT_IN_FRAME_ADDRESS:
- case BUILT_IN_RETURN_ADDRESS:
- return expand_builtin_frame_address (exp);
+ /* Only convert __{,v}sprintf_chk to {,v}sprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
+ {
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
+ }
- /* Returns the address of the area where the structure is returned.
- 0 otherwise. */
- case BUILT_IN_AGGREGATE_INCOMING_ADDRESS:
- if (arglist != 0
- || ! AGGREGATE_TYPE_P (TREE_TYPE (TREE_TYPE (current_function_decl)))
- || GET_CODE (DECL_RTL (DECL_RESULT (current_function_decl))) != MEM)
- return const0_rtx;
+ /* If __builtin_{,v}sprintf_chk is used, assume {,v}sprintf is available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSPRINTF_CHK
+ ? BUILT_IN_VSPRINTF : BUILT_IN_SPRINTF];
+ if (!fn)
+ return NULL_TREE;
+
+ return rewrite_call_expr (exp, 4, fn, 2, dest, fmt);
+}
+
+/* Fold a call EXP to {,v}snprintf. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SNPRINTF_CHK or
+ BUILT_IN_VSNPRINTF_CHK. If MAXLEN is not NULL, it is maximum length
+ passed as second argument. */
+
+tree
+fold_builtin_snprintf_chk (tree exp, tree maxlen,
+ enum built_in_function fcode)
+{
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+
+ /* Verify the required arguments in the original call. */
+ if (call_expr_nargs (exp) < 5)
+ return NULL_TREE;
+ dest = CALL_EXPR_ARG (exp, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ len = CALL_EXPR_ARG (exp, 1);
+ if (!validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ flag = CALL_EXPR_ARG (exp, 2);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = CALL_EXPR_ARG (exp, 3);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = CALL_EXPR_ARG (exp, 4);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ if (! host_integerp (len, 1))
+ {
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ return NULL_TREE;
+ }
else
- return XEXP (DECL_RTL (DECL_RESULT (current_function_decl)), 0);
+ maxlen = len;
- case BUILT_IN_ALLOCA:
- target = expand_builtin_alloca (arglist, target);
- if (target)
- return target;
- break;
+ if (tree_int_cst_lt (size, maxlen))
+ return NULL_TREE;
+ }
- case BUILT_IN_FFS:
- target = expand_builtin_ffs (arglist, target, subtarget);
- if (target)
- return target;
- break;
+ if (!init_target_chars ())
+ return NULL_TREE;
- case BUILT_IN_STRLEN:
- target = expand_builtin_strlen (exp, target);
- if (target)
- return target;
- break;
+ /* Only convert __{,v}snprintf_chk to {,v}snprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
+ {
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
+ }
- case BUILT_IN_STRCPY:
- target = expand_builtin_strcpy (exp, target, mode);
- if (target)
- return target;
- break;
+ /* If __builtin_{,v}snprintf_chk is used, assume {,v}snprintf is
+ available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSNPRINTF_CHK
+ ? BUILT_IN_VSNPRINTF : BUILT_IN_SNPRINTF];
+ if (!fn)
+ return NULL_TREE;
- case BUILT_IN_STRNCPY:
- target = expand_builtin_strncpy (arglist, target, mode);
- if (target)
- return target;
- break;
+ return rewrite_call_expr (exp, 5, fn, 3, dest, len, fmt);
+}
- case BUILT_IN_STRCAT:
- target = expand_builtin_strcat (arglist, target, mode);
- if (target)
- return target;
- break;
+/* Fold a call to the {,v}printf{,_unlocked} and __{,v}printf_chk builtins.
+ FMT and ARG are the arguments to the call; we don't fold cases with
+ more than 2 arguments, and ARG may be null if this is a 1-argument case.
- case BUILT_IN_STRNCAT:
- target = expand_builtin_strncat (arglist, target, mode);
- if (target)
- return target;
- break;
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree. FCODE is the BUILT_IN_*
+ code of the function to be simplified. */
- case BUILT_IN_STRSPN:
- target = expand_builtin_strspn (arglist, target, mode);
- if (target)
- return target;
- break;
+static tree
+fold_builtin_printf (tree fndecl, tree fmt, tree arg, bool ignore,
+ enum built_in_function fcode)
+{
+ tree fn_putchar, fn_puts, newarg, call = NULL_TREE;
+ const char *fmt_str = NULL;
- case BUILT_IN_STRCSPN:
- target = expand_builtin_strcspn (arglist, target, mode);
- if (target)
- return target;
- break;
+ /* If the return value is used, don't do the transformation. */
+ if (! ignore)
+ return NULL_TREE;
- case BUILT_IN_STRSTR:
- target = expand_builtin_strstr (arglist, target, mode);
- if (target)
- return target;
- break;
+ /* Verify the required arguments in the original call. */
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
- case BUILT_IN_STRPBRK:
- target = expand_builtin_strpbrk (arglist, target, mode);
- if (target)
- return target;
- break;
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
- case BUILT_IN_INDEX:
- case BUILT_IN_STRCHR:
- target = expand_builtin_strchr (arglist, target, mode);
- if (target)
- return target;
- break;
+ if (fcode == BUILT_IN_PRINTF_UNLOCKED)
+ {
+ /* If we're using an unlocked function, assume the other
+ unlocked functions exist explicitly. */
+ fn_putchar = built_in_decls[BUILT_IN_PUTCHAR_UNLOCKED];
+ fn_puts = built_in_decls[BUILT_IN_PUTS_UNLOCKED];
+ }
+ else
+ {
+ fn_putchar = implicit_built_in_decls[BUILT_IN_PUTCHAR];
+ fn_puts = implicit_built_in_decls[BUILT_IN_PUTS];
+ }
- case BUILT_IN_RINDEX:
- case BUILT_IN_STRRCHR:
- target = expand_builtin_strrchr (arglist, target, mode);
- if (target)
- return target;
- break;
+ if (!init_target_chars ())
+ return NULL_TREE;
- case BUILT_IN_MEMCPY:
- target = expand_builtin_memcpy (arglist, target, mode);
- if (target)
- return target;
- break;
+ if (strcmp (fmt_str, target_percent_s) == 0
+ || strchr (fmt_str, target_percent) == NULL)
+ {
+ const char *str;
- case BUILT_IN_MEMSET:
- target = expand_builtin_memset (exp, target, mode);
- if (target)
- return target;
- break;
+ if (strcmp (fmt_str, target_percent_s) == 0)
+ {
+ if (fcode == BUILT_IN_VPRINTF || fcode == BUILT_IN_VPRINTF_CHK)
+ return NULL_TREE;
+
+ if (!arg || !validate_arg (arg, POINTER_TYPE))
+ return NULL_TREE;
+
+ str = c_getstr (arg);
+ if (str == NULL)
+ return NULL_TREE;
+ }
+ else
+ {
+ /* The format specifier doesn't contain any '%' characters. */
+ if (fcode != BUILT_IN_VPRINTF && fcode != BUILT_IN_VPRINTF_CHK
+ && arg)
+ return NULL_TREE;
+ str = fmt_str;
+ }
+
+ /* If the string was "", printf does nothing. */
+ if (str[0] == '\0')
+ return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl)), 0);
+
+ /* If the string has length of 1, call putchar. */
+ if (str[1] == '\0')
+ {
+ /* Given printf("c"), (where c is any one character,)
+ convert "c"[0] to an int and pass that to the replacement
+ function. */
+ newarg = build_int_cst (NULL_TREE, str[0]);
+ if (fn_putchar)
+ call = build_call_expr (fn_putchar, 1, newarg);
+ }
+ else
+ {
+ /* If the string was "string\n", call puts("string"). */
+ size_t len = strlen (str);
+ if ((unsigned char)str[len - 1] == target_newline)
+ {
+ /* Create a NUL-terminated string that's one char shorter
+ than the original, stripping off the trailing '\n'. */
+ char *newstr = XALLOCAVEC (char, len);
+ memcpy (newstr, str, len - 1);
+ newstr[len - 1] = 0;
+
+ newarg = build_string_literal (len, newstr);
+ if (fn_puts)
+ call = build_call_expr (fn_puts, 1, newarg);
+ }
+ else
+ /* We'd like to arrange to call fputs(string,stdout) here,
+ but we need stdout and don't have a way to get it yet. */
+ return NULL_TREE;
+ }
+ }
+
+ /* The other optimizations can be done only on the non-va_list variants. */
+ else if (fcode == BUILT_IN_VPRINTF || fcode == BUILT_IN_VPRINTF_CHK)
+ return NULL_TREE;
+
+ /* If the format specifier was "%s\n", call __builtin_puts(arg). */
+ else if (strcmp (fmt_str, target_percent_s_newline) == 0)
+ {
+ if (!arg || !validate_arg (arg, POINTER_TYPE))
+ return NULL_TREE;
+ if (fn_puts)
+ call = build_call_expr (fn_puts, 1, arg);
+ }
+
+ /* If the format specifier was "%c", call __builtin_putchar(arg). */
+ else if (strcmp (fmt_str, target_percent_c) == 0)
+ {
+ if (!arg || !validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+ if (fn_putchar)
+ call = build_call_expr (fn_putchar, 1, arg);
+ }
+
+ if (!call)
+ return NULL_TREE;
+
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), call);
+}
+
+/* Fold a call to the {,v}fprintf{,_unlocked} and __{,v}printf_chk builtins.
+ FP, FMT, and ARG are the arguments to the call. We don't fold calls with
+ more than 3 arguments, and ARG may be null in the 2-argument case.
+
+ Return NULL_TREE if no simplification was possible, otherwise return the
+ simplified form of the call as a tree. FCODE is the BUILT_IN_*
+ code of the function to be simplified. */
+
+static tree
+fold_builtin_fprintf (tree fndecl, tree fp, tree fmt, tree arg, bool ignore,
+ enum built_in_function fcode)
+{
+ tree fn_fputc, fn_fputs, call = NULL_TREE;
+ const char *fmt_str = NULL;
+
+ /* If the return value is used, don't do the transformation. */
+ if (! ignore)
+ return NULL_TREE;
- case BUILT_IN_BZERO:
- target = expand_builtin_bzero (exp);
- if (target)
- return target;
- break;
+ /* Verify the required arguments in the original call. */
+ if (!validate_arg (fp, POINTER_TYPE))
+ return NULL_TREE;
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
- case BUILT_IN_STRCMP:
- target = expand_builtin_strcmp (exp, target, mode);
- if (target)
- return target;
- break;
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
- case BUILT_IN_STRNCMP:
- target = expand_builtin_strncmp (exp, target, mode);
- if (target)
- return target;
- break;
+ if (fcode == BUILT_IN_FPRINTF_UNLOCKED)
+ {
+ /* If we're using an unlocked function, assume the other
+ unlocked functions exist explicitly. */
+ fn_fputc = built_in_decls[BUILT_IN_FPUTC_UNLOCKED];
+ fn_fputs = built_in_decls[BUILT_IN_FPUTS_UNLOCKED];
+ }
+ else
+ {
+ fn_fputc = implicit_built_in_decls[BUILT_IN_FPUTC];
+ fn_fputs = implicit_built_in_decls[BUILT_IN_FPUTS];
+ }
- case BUILT_IN_BCMP:
- case BUILT_IN_MEMCMP:
- target = expand_builtin_memcmp (exp, arglist, target, mode);
- if (target)
- return target;
- break;
+ if (!init_target_chars ())
+ return NULL_TREE;
- case BUILT_IN_SETJMP:
- target = expand_builtin_setjmp (arglist, target);
- if (target)
- return target;
- break;
+ /* If the format doesn't contain % args or %%, use strcpy. */
+ if (strchr (fmt_str, target_percent) == NULL)
+ {
+ if (fcode != BUILT_IN_VFPRINTF && fcode != BUILT_IN_VFPRINTF_CHK
+ && arg)
+ return NULL_TREE;
- /* __builtin_longjmp is passed a pointer to an array of five words.
- It's similar to the C library longjmp function but works with
- __builtin_setjmp above. */
- case BUILT_IN_LONGJMP:
- if (!validate_arglist (arglist, POINTER_TYPE, INTEGER_TYPE, VOID_TYPE))
- break;
- else
+ /* If the format specifier was "", fprintf does nothing. */
+ if (fmt_str[0] == '\0')
{
- rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget,
- VOIDmode, 0);
- rtx value = expand_expr (TREE_VALUE (TREE_CHAIN (arglist)),
- NULL_RTX, VOIDmode, 0);
-
- if (value != const1_rtx)
- {
- error ("__builtin_longjmp second argument must be 1");
- return const0_rtx;
- }
+ /* If FP has side-effects, just wait until gimplification is
+ done. */
+ if (TREE_SIDE_EFFECTS (fp))
+ return NULL_TREE;
- expand_builtin_longjmp (buf_addr, value);
- return const0_rtx;
+ return build_int_cst (TREE_TYPE (TREE_TYPE (fndecl)), 0);
}
- case BUILT_IN_TRAP:
- expand_builtin_trap ();
- return const0_rtx;
-
- case BUILT_IN_PUTCHAR:
- case BUILT_IN_PUTS:
- case BUILT_IN_FPUTC:
- case BUILT_IN_FWRITE:
- case BUILT_IN_PUTCHAR_UNLOCKED:
- case BUILT_IN_PUTS_UNLOCKED:
- case BUILT_IN_FPUTC_UNLOCKED:
- case BUILT_IN_FWRITE_UNLOCKED:
- break;
- case BUILT_IN_FPUTS:
- target = expand_builtin_fputs (arglist, ignore,/*unlocked=*/ 0);
- if (target)
- return target;
- break;
- case BUILT_IN_FPUTS_UNLOCKED:
- target = expand_builtin_fputs (arglist, ignore,/*unlocked=*/ 1);
- if (target)
- return target;
- break;
+ /* When "string" doesn't contain %, replace all cases of
+ fprintf (fp, string) with fputs (string, fp). The fputs
+ builtin will take care of special cases like length == 1. */
+ if (fn_fputs)
+ call = build_call_expr (fn_fputs, 2, fmt, fp);
+ }
- /* Various hooks for the DWARF 2 __throw routine. */
- case BUILT_IN_UNWIND_INIT:
- expand_builtin_unwind_init ();
- return const0_rtx;
- case BUILT_IN_DWARF_CFA:
- return virtual_cfa_rtx;
-#ifdef DWARF2_UNWIND_INFO
- case BUILT_IN_DWARF_FP_REGNUM:
- return expand_builtin_dwarf_fp_regnum ();
- case BUILT_IN_INIT_DWARF_REG_SIZES:
- expand_builtin_init_dwarf_reg_sizes (TREE_VALUE (arglist));
- return const0_rtx;
-#endif
- case BUILT_IN_FROB_RETURN_ADDR:
- return expand_builtin_frob_return_addr (TREE_VALUE (arglist));
- case BUILT_IN_EXTRACT_RETURN_ADDR:
- return expand_builtin_extract_return_addr (TREE_VALUE (arglist));
- case BUILT_IN_EH_RETURN:
- expand_builtin_eh_return (TREE_VALUE (arglist),
- TREE_VALUE (TREE_CHAIN (arglist)));
- return const0_rtx;
-#ifdef EH_RETURN_DATA_REGNO
- case BUILT_IN_EH_RETURN_DATA_REGNO:
- return expand_builtin_eh_return_data_regno (arglist);
-#endif
- case BUILT_IN_VARARGS_START:
- return expand_builtin_va_start (0, arglist);
- case BUILT_IN_STDARG_START:
- return expand_builtin_va_start (1, arglist);
- case BUILT_IN_VA_END:
- return expand_builtin_va_end (arglist);
- case BUILT_IN_VA_COPY:
- return expand_builtin_va_copy (arglist);
- case BUILT_IN_EXPECT:
- return expand_builtin_expect (arglist, target);
- case BUILT_IN_PREFETCH:
- expand_builtin_prefetch (arglist);
- return const0_rtx;
+ /* The other optimizations can be done only on the non-va_list variants. */
+ else if (fcode == BUILT_IN_VFPRINTF || fcode == BUILT_IN_VFPRINTF_CHK)
+ return NULL_TREE;
+ /* If the format specifier was "%s", call __builtin_fputs (arg, fp). */
+ else if (strcmp (fmt_str, target_percent_s) == 0)
+ {
+ if (!arg || !validate_arg (arg, POINTER_TYPE))
+ return NULL_TREE;
+ if (fn_fputs)
+ call = build_call_expr (fn_fputs, 2, arg, fp);
+ }
- default: /* just do library call, if unknown builtin */
- error ("built-in function `%s' not currently supported",
- IDENTIFIER_POINTER (DECL_NAME (fndecl)));
+ /* If the format specifier was "%c", call __builtin_fputc (arg, fp). */
+ else if (strcmp (fmt_str, target_percent_c) == 0)
+ {
+ if (!arg || !validate_arg (arg, INTEGER_TYPE))
+ return NULL_TREE;
+ if (fn_fputc)
+ call = build_call_expr (fn_fputc, 2, arg, fp);
}
- /* The switch statement above can drop through to cause the function
- to be called normally. */
- return expand_call (exp, target, ignore);
+ if (!call)
+ return NULL_TREE;
+ return fold_convert (TREE_TYPE (TREE_TYPE (fndecl)), call);
+}
+
+/* Initialize format string characters in the target charset. */
+
+static bool
+init_target_chars (void)
+{
+ static bool init;
+ if (!init)
+ {
+ target_newline = lang_hooks.to_target_charset ('\n');
+ target_percent = lang_hooks.to_target_charset ('%');
+ target_c = lang_hooks.to_target_charset ('c');
+ target_s = lang_hooks.to_target_charset ('s');
+ if (target_newline == 0 || target_percent == 0 || target_c == 0
+ || target_s == 0)
+ return false;
+
+ target_percent_c[0] = target_percent;
+ target_percent_c[1] = target_c;
+ target_percent_c[2] = '\0';
+
+ target_percent_s[0] = target_percent;
+ target_percent_s[1] = target_s;
+ target_percent_s[2] = '\0';
+
+ target_percent_s_newline[0] = target_percent;
+ target_percent_s_newline[1] = target_s;
+ target_percent_s_newline[2] = target_newline;
+ target_percent_s_newline[3] = '\0';
+
+ init = true;
+ }
+ return true;
}
-/* Fold a call to __builtin_constant_p, if we know it will evaluate to a
- constant. ARGLIST is the argument list of the call. */
+/* Helper function for do_mpfr_arg*(). Ensure M is a normal number
+ and no overflow/underflow occurred. INEXACT is true if M was not
+ exactly calculated. TYPE is the tree type for the result. This
+ function assumes that you cleared the MPFR flags and then
+ calculated M to see if anything subsequently set a flag prior to
+ entering this function. Return NULL_TREE if any checks fail. */
static tree
-fold_builtin_constant_p (arglist)
- tree arglist;
+do_mpfr_ckconv (mpfr_srcptr m, tree type, int inexact)
{
- if (arglist == 0)
- return 0;
+ /* Proceed iff we get a normal number, i.e. not NaN or Inf and no
+ overflow/underflow occurred. If -frounding-math, proceed iff the
+ result of calling FUNC was exact. */
+ if (mpfr_number_p (m) && !mpfr_overflow_p () && !mpfr_underflow_p ()
+ && (!flag_rounding_math || !inexact))
+ {
+ REAL_VALUE_TYPE rr;
+
+ real_from_mpfr (&rr, m, type, GMP_RNDN);
+ /* Proceed iff GCC's REAL_VALUE_TYPE can hold the MPFR value,
+ check for overflow/underflow. If the REAL_VALUE_TYPE is zero
+ but the mpft_t is not, then we underflowed in the
+ conversion. */
+ if (real_isfinite (&rr)
+ && (rr.cl == rvc_zero) == (mpfr_zero_p (m) != 0))
+ {
+ REAL_VALUE_TYPE rmode;
+
+ real_convert (&rmode, TYPE_MODE (type), &rr);
+ /* Proceed iff the specified mode can hold the value. */
+ if (real_identical (&rmode, &rr))
+ return build_real (type, rmode);
+ }
+ }
+ return NULL_TREE;
+}
- arglist = TREE_VALUE (arglist);
+/* If argument ARG is a REAL_CST, call the one-argument mpfr function
+ FUNC on it and return the resulting value as a tree with type TYPE.
+ If MIN and/or MAX are not NULL, then the supplied ARG must be
+ within those bounds. If INCLUSIVE is true, then MIN/MAX are
+ acceptable values, otherwise they are not. The mpfr precision is
+ set to the precision of TYPE. We assume that function FUNC returns
+ zero if the result could be calculated exactly within the requested
+ precision. */
- /* We return 1 for a numeric type that's known to be a constant
- value at compile-time or for an aggregate type that's a
- literal constant. */
- STRIP_NOPS (arglist);
+static tree
+do_mpfr_arg1 (tree arg, tree type, int (*func)(mpfr_ptr, mpfr_srcptr, mp_rnd_t),
+ const REAL_VALUE_TYPE *min, const REAL_VALUE_TYPE *max,
+ bool inclusive)
+{
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE *const ra = &TREE_REAL_CST (arg);
- /* If we know this is a constant, emit the constant of one. */
- if (TREE_CODE_CLASS (TREE_CODE (arglist)) == 'c'
- || (TREE_CODE (arglist) == CONSTRUCTOR
- && TREE_CONSTANT (arglist))
- || (TREE_CODE (arglist) == ADDR_EXPR
- && TREE_CODE (TREE_OPERAND (arglist, 0)) == STRING_CST))
- return integer_one_node;
+ if (real_isfinite (ra)
+ && (!min || real_compare (inclusive ? GE_EXPR: GT_EXPR , ra, min))
+ && (!max || real_compare (inclusive ? LE_EXPR: LT_EXPR , ra, max)))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ int inexact;
+ mpfr_t m;
+
+ mpfr_init2 (m, prec);
+ mpfr_from_real (m, ra, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = func (m, m, rnd);
+ result = do_mpfr_ckconv (m, type, inexact);
+ mpfr_clear (m);
+ }
+ }
+
+ return result;
+}
- /* If we aren't going to be running CSE or this expression
- has side effects, show we don't know it to be a constant.
- Likewise if it's a pointer or aggregate type since in those
- case we only want literals, since those are only optimized
- when generating RTL, not later.
- And finally, if we are compiling an initializer, not code, we
- need to return a definite result now; there's not going to be any
- more optimization done. */
- if (TREE_SIDE_EFFECTS (arglist) || cse_not_expected
- || AGGREGATE_TYPE_P (TREE_TYPE (arglist))
- || POINTER_TYPE_P (TREE_TYPE (arglist))
- || cfun == 0)
- return integer_zero_node;
+/* If argument ARG is a REAL_CST, call the two-argument mpfr function
+ FUNC on it and return the resulting value as a tree with type TYPE.
+ The mpfr precision is set to the precision of TYPE. We assume that
+ function FUNC returns zero if the result could be calculated
+ exactly within the requested precision. */
- return 0;
+static tree
+do_mpfr_arg2 (tree arg1, tree arg2, tree type,
+ int (*func)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t))
+{
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg1);
+ STRIP_NOPS (arg2);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg1) == REAL_CST && !TREE_OVERFLOW (arg1)
+ && TREE_CODE (arg2) == REAL_CST && !TREE_OVERFLOW (arg2))
+ {
+ const REAL_VALUE_TYPE *const ra1 = &TREE_REAL_CST (arg1);
+ const REAL_VALUE_TYPE *const ra2 = &TREE_REAL_CST (arg2);
+
+ if (real_isfinite (ra1) && real_isfinite (ra2))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ int inexact;
+ mpfr_t m1, m2;
+
+ mpfr_inits2 (prec, m1, m2, NULL);
+ mpfr_from_real (m1, ra1, GMP_RNDN);
+ mpfr_from_real (m2, ra2, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = func (m1, m1, m2, rnd);
+ result = do_mpfr_ckconv (m1, type, inexact);
+ mpfr_clears (m1, m2, NULL);
+ }
+ }
+
+ return result;
}
-/* Fold a call to __builtin_classify_type. */
+/* If argument ARG is a REAL_CST, call the three-argument mpfr function
+ FUNC on it and return the resulting value as a tree with type TYPE.
+ The mpfr precision is set to the precision of TYPE. We assume that
+ function FUNC returns zero if the result could be calculated
+ exactly within the requested precision. */
static tree
-fold_builtin_classify_type (arglist)
- tree arglist;
+do_mpfr_arg3 (tree arg1, tree arg2, tree arg3, tree type,
+ int (*func)(mpfr_ptr, mpfr_srcptr, mpfr_srcptr, mpfr_srcptr, mp_rnd_t))
{
- if (arglist == 0)
- return build_int_2 (no_type_class, 0);
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg1);
+ STRIP_NOPS (arg2);
+ STRIP_NOPS (arg3);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg1) == REAL_CST && !TREE_OVERFLOW (arg1)
+ && TREE_CODE (arg2) == REAL_CST && !TREE_OVERFLOW (arg2)
+ && TREE_CODE (arg3) == REAL_CST && !TREE_OVERFLOW (arg3))
+ {
+ const REAL_VALUE_TYPE *const ra1 = &TREE_REAL_CST (arg1);
+ const REAL_VALUE_TYPE *const ra2 = &TREE_REAL_CST (arg2);
+ const REAL_VALUE_TYPE *const ra3 = &TREE_REAL_CST (arg3);
- return build_int_2 (type_to_class (TREE_TYPE (TREE_VALUE (arglist))), 0);
+ if (real_isfinite (ra1) && real_isfinite (ra2) && real_isfinite (ra3))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ int inexact;
+ mpfr_t m1, m2, m3;
+
+ mpfr_inits2 (prec, m1, m2, m3, NULL);
+ mpfr_from_real (m1, ra1, GMP_RNDN);
+ mpfr_from_real (m2, ra2, GMP_RNDN);
+ mpfr_from_real (m3, ra3, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = func (m1, m1, m2, m3, rnd);
+ result = do_mpfr_ckconv (m1, type, inexact);
+ mpfr_clears (m1, m2, m3, NULL);
+ }
+ }
+
+ return result;
}
-/* Used by constant folding to eliminate some builtin calls early. EXP is
- the CALL_EXPR of a call to a builtin function. */
+/* If argument ARG is a REAL_CST, call mpfr_sin_cos() on it and set
+ the pointers *(ARG_SINP) and *(ARG_COSP) to the resulting values.
+ If ARG_SINP and ARG_COSP are NULL then the result is returned
+ as a complex value.
+ The type is taken from the type of ARG and is used for setting the
+ precision of the calculation and results. */
-tree
-fold_builtin (exp)
- tree exp;
+static tree
+do_mpfr_sincos (tree arg, tree arg_sinp, tree arg_cosp)
{
- tree fndecl = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
- tree arglist = TREE_OPERAND (exp, 1);
- enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree const type = TREE_TYPE (arg);
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg) == REAL_CST
+ && !TREE_OVERFLOW (arg))
+ {
+ const REAL_VALUE_TYPE *const ra = &TREE_REAL_CST (arg);
- if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
- return 0;
+ if (real_isfinite (ra))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ tree result_s, result_c;
+ int inexact;
+ mpfr_t m, ms, mc;
+
+ mpfr_inits2 (prec, m, ms, mc, NULL);
+ mpfr_from_real (m, ra, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = mpfr_sin_cos (ms, mc, m, rnd);
+ result_s = do_mpfr_ckconv (ms, type, inexact);
+ result_c = do_mpfr_ckconv (mc, type, inexact);
+ mpfr_clears (m, ms, mc, NULL);
+ if (result_s && result_c)
+ {
+ /* If we are to return in a complex value do so. */
+ if (!arg_sinp && !arg_cosp)
+ return build_complex (build_complex_type (type),
+ result_c, result_s);
+
+ /* Dereference the sin/cos pointer arguments. */
+ arg_sinp = build_fold_indirect_ref (arg_sinp);
+ arg_cosp = build_fold_indirect_ref (arg_cosp);
+ /* Proceed if valid pointer type were passed in. */
+ if (TYPE_MAIN_VARIANT (TREE_TYPE (arg_sinp)) == TYPE_MAIN_VARIANT (type)
+ && TYPE_MAIN_VARIANT (TREE_TYPE (arg_cosp)) == TYPE_MAIN_VARIANT (type))
+ {
+ /* Set the values. */
+ result_s = fold_build2 (MODIFY_EXPR, type, arg_sinp,
+ result_s);
+ TREE_SIDE_EFFECTS (result_s) = 1;
+ result_c = fold_build2 (MODIFY_EXPR, type, arg_cosp,
+ result_c);
+ TREE_SIDE_EFFECTS (result_c) = 1;
+ /* Combine the assignments into a compound expr. */
+ result = non_lvalue (fold_build2 (COMPOUND_EXPR, type,
+ result_s, result_c));
+ }
+ }
+ }
+ }
+ return result;
+}
- switch (fcode)
+/* If argument ARG1 is an INTEGER_CST and ARG2 is a REAL_CST, call the
+ two-argument mpfr order N Bessel function FUNC on them and return
+ the resulting value as a tree with type TYPE. The mpfr precision
+ is set to the precision of TYPE. We assume that function FUNC
+ returns zero if the result could be calculated exactly within the
+ requested precision. */
+static tree
+do_mpfr_bessel_n (tree arg1, tree arg2, tree type,
+ int (*func)(mpfr_ptr, long, mpfr_srcptr, mp_rnd_t),
+ const REAL_VALUE_TYPE *min, bool inclusive)
+{
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg1);
+ STRIP_NOPS (arg2);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && host_integerp (arg1, 0)
+ && TREE_CODE (arg2) == REAL_CST && !TREE_OVERFLOW (arg2))
{
- case BUILT_IN_CONSTANT_P:
- return fold_builtin_constant_p (arglist);
+ const HOST_WIDE_INT n = tree_low_cst(arg1, 0);
+ const REAL_VALUE_TYPE *const ra = &TREE_REAL_CST (arg2);
- case BUILT_IN_CLASSIFY_TYPE:
- return fold_builtin_classify_type (arglist);
+ if (n == (long)n
+ && real_isfinite (ra)
+ && (!min || real_compare (inclusive ? GE_EXPR: GT_EXPR , ra, min)))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ int inexact;
+ mpfr_t m;
+
+ mpfr_init2 (m, prec);
+ mpfr_from_real (m, ra, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = func (m, n, m, rnd);
+ result = do_mpfr_ckconv (m, type, inexact);
+ mpfr_clear (m);
+ }
+ }
+
+ return result;
+}
- case BUILT_IN_STRLEN:
- if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
- {
- tree len = c_strlen (TREE_VALUE (arglist));
- if (len)
+/* If arguments ARG0 and ARG1 are REAL_CSTs, call mpfr_remquo() to set
+ the pointer *(ARG_QUO) and return the result. The type is taken
+ from the type of ARG0 and is used for setting the precision of the
+ calculation and results. */
+
+static tree
+do_mpfr_remquo (tree arg0, tree arg1, tree arg_quo)
+{
+ tree const type = TREE_TYPE (arg0);
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg0);
+ STRIP_NOPS (arg1);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0)
+ && TREE_CODE (arg1) == REAL_CST && !TREE_OVERFLOW (arg1))
+ {
+ const REAL_VALUE_TYPE *const ra0 = TREE_REAL_CST_PTR (arg0);
+ const REAL_VALUE_TYPE *const ra1 = TREE_REAL_CST_PTR (arg1);
+
+ if (real_isfinite (ra0) && real_isfinite (ra1))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ tree result_rem;
+ long integer_quo;
+ mpfr_t m0, m1;
+
+ mpfr_inits2 (prec, m0, m1, NULL);
+ mpfr_from_real (m0, ra0, GMP_RNDN);
+ mpfr_from_real (m1, ra1, GMP_RNDN);
+ mpfr_clear_flags ();
+ mpfr_remquo (m0, &integer_quo, m0, m1, rnd);
+ /* Remquo is independent of the rounding mode, so pass
+ inexact=0 to do_mpfr_ckconv(). */
+ result_rem = do_mpfr_ckconv (m0, type, /*inexact=*/ 0);
+ mpfr_clears (m0, m1, NULL);
+ if (result_rem)
{
- /* Convert from the internal "sizetype" type to "size_t". */
- if (size_type_node)
- len = convert (size_type_node, len);
- return len;
+ /* MPFR calculates quo in the host's long so it may
+ return more bits in quo than the target int can hold
+ if sizeof(host long) > sizeof(target int). This can
+ happen even for native compilers in LP64 mode. In
+ these cases, modulo the quo value with the largest
+ number that the target int can hold while leaving one
+ bit for the sign. */
+ if (sizeof (integer_quo) * CHAR_BIT > INT_TYPE_SIZE)
+ integer_quo %= (long)(1UL << (INT_TYPE_SIZE - 1));
+
+ /* Dereference the quo pointer argument. */
+ arg_quo = build_fold_indirect_ref (arg_quo);
+ /* Proceed iff a valid pointer type was passed in. */
+ if (TYPE_MAIN_VARIANT (TREE_TYPE (arg_quo)) == integer_type_node)
+ {
+ /* Set the value. */
+ tree result_quo = fold_build2 (MODIFY_EXPR,
+ TREE_TYPE (arg_quo), arg_quo,
+ build_int_cst (NULL, integer_quo));
+ TREE_SIDE_EFFECTS (result_quo) = 1;
+ /* Combine the quo assignment with the rem. */
+ result = non_lvalue (fold_build2 (COMPOUND_EXPR, type,
+ result_quo, result_rem));
+ }
}
}
- break;
+ }
+ return result;
+}
- default:
- break;
+/* If ARG is a REAL_CST, call mpfr_lgamma() on it and return the
+ resulting value as a tree with type TYPE. The mpfr precision is
+ set to the precision of TYPE. We assume that this mpfr function
+ returns zero if the result could be calculated exactly within the
+ requested precision. In addition, the integer pointer represented
+ by ARG_SG will be dereferenced and set to the appropriate signgam
+ (-1,1) value. */
+
+static tree
+do_mpfr_lgamma_r (tree arg, tree arg_sg, tree type)
+{
+ tree result = NULL_TREE;
+
+ STRIP_NOPS (arg);
+
+ /* To proceed, MPFR must exactly represent the target floating point
+ format, which only happens when the target base equals two. Also
+ verify ARG is a constant and that ARG_SG is an int pointer. */
+ if (REAL_MODE_FORMAT (TYPE_MODE (type))->b == 2
+ && TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg)
+ && TREE_CODE (TREE_TYPE (arg_sg)) == POINTER_TYPE
+ && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (arg_sg))) == integer_type_node)
+ {
+ const REAL_VALUE_TYPE *const ra = TREE_REAL_CST_PTR (arg);
+
+ /* In addition to NaN and Inf, the argument cannot be zero or a
+ negative integer. */
+ if (real_isfinite (ra)
+ && ra->cl != rvc_zero
+ && !(real_isneg(ra) && real_isinteger(ra, TYPE_MODE (type))))
+ {
+ const struct real_format *fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
+ const int prec = fmt->p;
+ const mp_rnd_t rnd = fmt->round_towards_zero? GMP_RNDZ : GMP_RNDN;
+ int inexact, sg;
+ mpfr_t m;
+ tree result_lg;
+
+ mpfr_init2 (m, prec);
+ mpfr_from_real (m, ra, GMP_RNDN);
+ mpfr_clear_flags ();
+ inexact = mpfr_lgamma (m, &sg, m, rnd);
+ result_lg = do_mpfr_ckconv (m, type, inexact);
+ mpfr_clear (m);
+ if (result_lg)
+ {
+ tree result_sg;
+
+ /* Dereference the arg_sg pointer argument. */
+ arg_sg = build_fold_indirect_ref (arg_sg);
+ /* Assign the signgam value into *arg_sg. */
+ result_sg = fold_build2 (MODIFY_EXPR,
+ TREE_TYPE (arg_sg), arg_sg,
+ build_int_cst (NULL, sg));
+ TREE_SIDE_EFFECTS (result_sg) = 1;
+ /* Combine the signgam assignment with the lgamma result. */
+ result = non_lvalue (fold_build2 (COMPOUND_EXPR, type,
+ result_sg, result_lg));
+ }
+ }
}
- return 0;
+ return result;
+}
+
+/* FIXME tuples.
+ The functions below provide an alternate interface for folding
+ builtin function calls presented as GIMPLE_CALL statements rather
+ than as CALL_EXPRs. The folded result is still expressed as a
+ tree. There is too much code duplication in the handling of
+ varargs functions, and a more intrusive re-factoring would permit
+ better sharing of code between the tree and statement-based
+ versions of these functions. */
+
+/* Construct a new CALL_EXPR using the tail of the argument list of STMT
+ along with N new arguments specified as the "..." parameters. SKIP
+ is the number of arguments in STMT to be omitted. This function is used
+ to do varargs-to-varargs transformations. */
+
+static tree
+gimple_rewrite_call_expr (gimple stmt, int skip, tree fndecl, int n, ...)
+{
+ int oldnargs = gimple_call_num_args (stmt);
+ int nargs = oldnargs - skip + n;
+ tree fntype = TREE_TYPE (fndecl);
+ tree fn = build1 (ADDR_EXPR, build_pointer_type (fntype), fndecl);
+ tree *buffer;
+ int i, j;
+ va_list ap;
+
+ buffer = XALLOCAVEC (tree, nargs);
+ va_start (ap, n);
+ for (i = 0; i < n; i++)
+ buffer[i] = va_arg (ap, tree);
+ va_end (ap);
+ for (j = skip; j < oldnargs; j++, i++)
+ buffer[i] = gimple_call_arg (stmt, j);
+
+ return fold (build_call_array (TREE_TYPE (fntype), fn, nargs, buffer));
}
+/* Fold a call STMT to __{,v}sprintf_chk. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SPRINTF_CHK or BUILT_IN_VSPRINTF_CHK. */
+
static tree
-build_function_call_expr (fn, arglist)
- tree fn, arglist;
+gimple_fold_builtin_sprintf_chk (gimple stmt, enum built_in_function fcode)
{
- tree call_expr;
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+ int nargs = gimple_call_num_args (stmt);
+
+ /* Verify the required arguments in the original call. */
+ if (nargs < 4)
+ return NULL_TREE;
+ dest = gimple_call_arg (stmt, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ flag = gimple_call_arg (stmt, 1);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = gimple_call_arg (stmt, 2);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = gimple_call_arg (stmt, 3);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ len = NULL_TREE;
+
+ if (!init_target_chars ())
+ return NULL_TREE;
+
+ /* Check whether the format is a literal string constant. */
+ fmt_str = c_getstr (fmt);
+ if (fmt_str != NULL)
+ {
+ /* If the format doesn't contain % args or %%, we know the size. */
+ if (strchr (fmt_str, target_percent) == 0)
+ {
+ if (fcode != BUILT_IN_SPRINTF_CHK || nargs == 4)
+ len = build_int_cstu (size_type_node, strlen (fmt_str));
+ }
+ /* If the format is "%s" and first ... argument is a string literal,
+ we know the size too. */
+ else if (fcode == BUILT_IN_SPRINTF_CHK
+ && strcmp (fmt_str, target_percent_s) == 0)
+ {
+ tree arg;
+
+ if (nargs == 5)
+ {
+ arg = gimple_call_arg (stmt, 4);
+ if (validate_arg (arg, POINTER_TYPE))
+ {
+ len = c_strlen (arg, 1);
+ if (! len || ! host_integerp (len, 1))
+ len = NULL_TREE;
+ }
+ }
+ }
+ }
+
+ if (! integer_all_onesp (size))
+ {
+ if (! len || ! tree_int_cst_lt (len, size))
+ return NULL_TREE;
+ }
+
+ /* Only convert __{,v}sprintf_chk to {,v}sprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
+ {
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
+ }
+
+ /* If __builtin_{,v}sprintf_chk is used, assume {,v}sprintf is available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSPRINTF_CHK
+ ? BUILT_IN_VSPRINTF : BUILT_IN_SPRINTF];
+ if (!fn)
+ return NULL_TREE;
- call_expr = build1 (ADDR_EXPR, build_pointer_type (TREE_TYPE (fn)), fn);
- call_expr = build (CALL_EXPR, TREE_TYPE (TREE_TYPE (fn)),
- call_expr, arglist);
- TREE_SIDE_EFFECTS (call_expr) = 1;
- return fold (call_expr);
+ return gimple_rewrite_call_expr (stmt, 4, fn, 2, dest, fmt);
}
-/* This function validates the types of a function call argument list
- represented as a tree chain of parameters against a specified list
- of tree_codes. If the last specifier is a 0, that represents an
- ellipses, otherwise the last specifier must be a VOID_TYPE. */
+/* Fold a call STMT to {,v}snprintf. Return NULL_TREE if
+ a normal call should be emitted rather than expanding the function
+ inline. FCODE is either BUILT_IN_SNPRINTF_CHK or
+ BUILT_IN_VSNPRINTF_CHK. If MAXLEN is not NULL, it is maximum length
+ passed as second argument. */
-static int
-validate_arglist VPARAMS ((tree arglist, ...))
+tree
+gimple_fold_builtin_snprintf_chk (gimple stmt, tree maxlen,
+ enum built_in_function fcode)
{
- enum tree_code code;
- int res = 0;
+ tree dest, size, len, fn, fmt, flag;
+ const char *fmt_str;
+
+ /* Verify the required arguments in the original call. */
+ if (gimple_call_num_args (stmt) < 5)
+ return NULL_TREE;
+ dest = gimple_call_arg (stmt, 0);
+ if (!validate_arg (dest, POINTER_TYPE))
+ return NULL_TREE;
+ len = gimple_call_arg (stmt, 1);
+ if (!validate_arg (len, INTEGER_TYPE))
+ return NULL_TREE;
+ flag = gimple_call_arg (stmt, 2);
+ if (!validate_arg (flag, INTEGER_TYPE))
+ return NULL_TREE;
+ size = gimple_call_arg (stmt, 3);
+ if (!validate_arg (size, INTEGER_TYPE))
+ return NULL_TREE;
+ fmt = gimple_call_arg (stmt, 4);
+ if (!validate_arg (fmt, POINTER_TYPE))
+ return NULL_TREE;
+
+ if (! host_integerp (size, 1))
+ return NULL_TREE;
+
+ if (! integer_all_onesp (size))
+ {
+ if (! host_integerp (len, 1))
+ {
+ /* If LEN is not constant, try MAXLEN too.
+ For MAXLEN only allow optimizing into non-_ocs function
+ if SIZE is >= MAXLEN, never convert to __ocs_fail (). */
+ if (maxlen == NULL_TREE || ! host_integerp (maxlen, 1))
+ return NULL_TREE;
+ }
+ else
+ maxlen = len;
- VA_OPEN (ap, arglist);
- VA_FIXEDARG (ap, tree, arglist);
+ if (tree_int_cst_lt (size, maxlen))
+ return NULL_TREE;
+ }
+
+ if (!init_target_chars ())
+ return NULL_TREE;
- do {
- code = va_arg (ap, enum tree_code);
- switch (code)
+ /* Only convert __{,v}snprintf_chk to {,v}snprintf if flag is 0
+ or if format doesn't contain % chars or is "%s". */
+ if (! integer_zerop (flag))
{
- case 0:
- /* This signifies an ellipses, any further arguments are all ok. */
- res = 1;
- goto end;
- case VOID_TYPE:
- /* This signifies an endlink, if no arguments remain, return
- true, otherwise return false. */
- res = arglist == 0;
- goto end;
- default:
- /* If no parameters remain or the parameter's code does not
- match the specified code, return false. Otherwise continue
- checking any remaining arguments. */
- if (arglist == 0 || code != TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))))
- goto end;
- break;
+ fmt_str = c_getstr (fmt);
+ if (fmt_str == NULL)
+ return NULL_TREE;
+ if (strchr (fmt_str, target_percent) != NULL
+ && strcmp (fmt_str, target_percent_s))
+ return NULL_TREE;
}
- arglist = TREE_CHAIN (arglist);
- } while (1);
- /* We need gotos here since we can only have one VA_CLOSE in a
- function. */
- end: ;
- VA_CLOSE (ap);
+ /* If __builtin_{,v}snprintf_chk is used, assume {,v}snprintf is
+ available. */
+ fn = built_in_decls[fcode == BUILT_IN_VSNPRINTF_CHK
+ ? BUILT_IN_VSNPRINTF : BUILT_IN_SNPRINTF];
+ if (!fn)
+ return NULL_TREE;
- return res;
+ return gimple_rewrite_call_expr (stmt, 5, fn, 3, dest, len, fmt);
}
-/* Default version of target-specific builtin setup that does nothing. */
+/* Builtins with folding operations that operate on "..." arguments
+ need special handling; we need to store the arguments in a convenient
+ data structure before attempting any folding. Fortunately there are
+ only a few builtins that fall into this category. FNDECL is the
+ function, EXP is the CALL_EXPR for the call, and IGNORE is true if the
+ result of the function call is ignored. */
-void
-default_init_builtins ()
+static tree
+gimple_fold_builtin_varargs (tree fndecl, gimple stmt, bool ignore ATTRIBUTE_UNUSED)
{
+ enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
+ tree ret = NULL_TREE;
+
+ switch (fcode)
+ {
+ case BUILT_IN_SPRINTF_CHK:
+ case BUILT_IN_VSPRINTF_CHK:
+ ret = gimple_fold_builtin_sprintf_chk (stmt, fcode);
+ break;
+
+ case BUILT_IN_SNPRINTF_CHK:
+ case BUILT_IN_VSNPRINTF_CHK:
+ ret = gimple_fold_builtin_snprintf_chk (stmt, NULL_TREE, fcode);
+
+ default:
+ break;
+ }
+ if (ret)
+ {
+ ret = build1 (NOP_EXPR, TREE_TYPE (ret), ret);
+ TREE_NO_WARNING (ret) = 1;
+ return ret;
+ }
+ return NULL_TREE;
}
-/* Default target-specific builtin expander that does nothing. */
+/* A wrapper function for builtin folding that prevents warnings for
+ "statement without effect" and the like, caused by removing the
+ call node earlier than the warning is generated. */
-rtx
-default_expand_builtin (exp, target, subtarget, mode, ignore)
- tree exp ATTRIBUTE_UNUSED;
- rtx target ATTRIBUTE_UNUSED;
- rtx subtarget ATTRIBUTE_UNUSED;
- enum machine_mode mode ATTRIBUTE_UNUSED;
- int ignore ATTRIBUTE_UNUSED;
+tree
+fold_call_stmt (gimple stmt, bool ignore)
{
- return NULL_RTX;
+ tree ret = NULL_TREE;
+ tree fndecl = gimple_call_fndecl (stmt);
+ if (fndecl
+ && TREE_CODE (fndecl) == FUNCTION_DECL
+ && DECL_BUILT_IN (fndecl)
+ && !gimple_call_va_arg_pack_p (stmt))
+ {
+ int nargs = gimple_call_num_args (stmt);
+
+ if (avoid_folding_inline_builtin (fndecl))
+ return NULL_TREE;
+ /* FIXME: Don't use a list in this interface. */
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
+ {
+ tree arglist = NULL_TREE;
+ int i;
+ for (i = nargs - 1; i >= 0; i--)
+ arglist = tree_cons (NULL_TREE, gimple_call_arg (stmt, i), arglist);
+ return targetm.fold_builtin (fndecl, arglist, ignore);
+ }
+ else
+ {
+ if (nargs <= MAX_ARGS_TO_FOLD_BUILTIN)
+ {
+ tree args[MAX_ARGS_TO_FOLD_BUILTIN];
+ int i;
+ for (i = 0; i < nargs; i++)
+ args[i] = gimple_call_arg (stmt, i);
+ ret = fold_builtin_n (fndecl, args, nargs, ignore);
+ }
+ if (!ret)
+ ret = gimple_fold_builtin_varargs (fndecl, stmt, ignore);
+ if (ret)
+ {
+ /* Propagate location information from original call to
+ expansion of builtin. Otherwise things like
+ maybe_emit_chk_warning, that operate on the expansion
+ of a builtin, will use the wrong location information. */
+ if (gimple_has_location (stmt))
+ {
+ tree realret = ret;
+ if (TREE_CODE (ret) == NOP_EXPR)
+ realret = TREE_OPERAND (ret, 0);
+ if (CAN_HAVE_LOCATION_P (realret)
+ && !EXPR_HAS_LOCATION (realret))
+ SET_EXPR_LOCATION (realret, gimple_location (stmt));
+ return realret;
+ }
+ return ret;
+ }
+ }
+ }
+ return NULL_TREE;
}
projects / msp430-gcc.git / blobdiff