/* Structure for saving state for a nested function.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ 1999, 2000, 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/>. */
-struct var_refs_queue
-{
- rtx modified;
- enum machine_mode promoted_mode;
- int unsignedp;
- struct var_refs_queue *next;
-};
+#ifndef GCC_FUNCTION_H
+#define GCC_FUNCTION_H
+
+#include "tree.h"
+#include "hashtab.h"
+#include "varray.h"
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
The main insn-chain is saved in the last element of the chain,
unless the chain is empty. */
-struct sequence_stack
+struct sequence_stack GTY(())
{
/* First and last insns in the chain of the saved sequence. */
- rtx first, last;
- tree sequence_rtl_expr;
+ rtx first;
+ rtx last;
struct sequence_stack *next;
};
-
-extern struct sequence_stack *sequence_stack;
-
-/* Stack of single obstacks. */
-
-struct simple_obstack_stack
-{
- struct obstack *obstack;
- struct simple_obstack_stack *next;
-};
\f
-struct emit_status
+struct emit_status GTY(())
{
/* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
After rtl generation, it is 1 plus the largest register number used. */
/* The ends of the doubly-linked chain of rtl for the current function.
Both are reset to null at the start of rtl generation for the function.
-
- start_sequence saves both of these on `sequence_stack' along with
- `sequence_rtl_expr' and then starts a new, nested sequence of insns. */
+
+ start_sequence saves both of these on `sequence_stack' and then starts
+ a new, nested sequence of insns. */
rtx x_first_insn;
rtx x_last_insn;
- /* RTL_EXPR within which the current sequence will be placed. Use to
- prevent reuse of any temporaries within the sequence until after the
- RTL_EXPR is emitted. */
- tree sequence_rtl_expr;
-
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
The main insn-chain is saved in the last element of the chain,
Reset to 1 for each function compiled. */
int x_cur_insn_uid;
- /* Line number and source file of the last line-number NOTE emitted.
+ /* Location the last line-number NOTE emitted.
This is used to avoid generating duplicates. */
- int x_last_linenum;
- const char *x_last_filename;
+ location_t x_last_location;
/* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
vectors. Since these vectors are needed during the expansion phase when
/* Indexed by pseudo register number, if nonzero gives the known alignment
for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
Allocated in parallel with x_regno_reg_rtx. */
- unsigned char *regno_pointer_align;
+ unsigned char * GTY((skip)) regno_pointer_align;
+};
- /* Indexed by pseudo register number, if nonzero gives the decl
- corresponding to that register. */
- tree *regno_decl;
- /* Indexed by pseudo register number, gives the rtx for that pseudo.
- Allocated in parallel with regno_pointer_align. */
- rtx *x_regno_reg_rtx;
-};
+/* Indexed by pseudo register number, gives the rtx for that pseudo.
+ Allocated in parallel with regno_pointer_align.
+ FIXME: We could put it into emit_status struct, but gengtype is not able to deal
+ with length attribute nested in top level structures. */
+
+extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
/* For backward compatibility... eventually these should all go away. */
-#define reg_rtx_no (cfun->emit->x_reg_rtx_no)
-#define seq_rtl_expr (cfun->emit->sequence_rtl_expr)
-#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
-#define seq_stack (cfun->emit->sequence_stack)
+#define reg_rtx_no (crtl->emit.x_reg_rtx_no)
+#define seq_stack (crtl->emit.sequence_stack)
-#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
-#define REGNO_DECL(REGNO) (cfun->emit->regno_decl[REGNO])
+#define REGNO_POINTER_ALIGN(REGNO) (crtl->emit.regno_pointer_align[REGNO])
-struct expr_status
+struct expr_status GTY(())
{
/* Number of units that we should eventually pop off the stack.
These are the arguments to function calls that have already returned. */
since code outside the conditional won't know whether or not the
arguments need to be popped.)
- When INHIBIT_DEFER_POP is non-zero, however, the compiler does not
+ When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
attempt to defer pops. Instead, the stack is popped immediately
after each call. Rather then setting this variable directly, use
NO_DEFER_POP and OK_DEFER_POP. */
int x_inhibit_defer_pop;
/* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
- boundary can be momentairly unaligned while pushing the arguments.
+ boundary can be momentarily unaligned while pushing the arguments.
Record the delta since last aligned boundary here in order to get
stack alignment in the nested function calls working right. */
int x_stack_pointer_delta;
/* List of labels that must never be deleted. */
rtx x_forced_labels;
-
- /* Postincrements that still need to be expanded. */
- rtx x_pending_chain;
};
-#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
-#define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop)
-#define saveregs_value (cfun->expr->x_saveregs_value)
-#define apply_args_value (cfun->expr->x_apply_args_value)
-#define forced_labels (cfun->expr->x_forced_labels)
-#define pending_chain (cfun->expr->x_pending_chain)
-#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
-
-/* This structure can save all the important global and static variables
- describing the status of the current function. */
+typedef struct call_site_record *call_site_record;
+DEF_VEC_P(call_site_record);
+DEF_VEC_ALLOC_P(call_site_record, gc);
-struct function
+/* RTL representation of exception handling. */
+struct rtl_eh GTY(())
{
- struct eh_status *eh;
- struct stmt_status *stmt;
- struct expr_status *expr;
- struct emit_status *emit;
- struct varasm_status *varasm;
+ rtx filter;
+ rtx exc_ptr;
- /* For function.c. */
+ int built_landing_pads;
- /* Name of this function. */
- const char *name;
+ rtx ehr_stackadj;
+ rtx ehr_handler;
+ rtx ehr_label;
- /* Points to the FUNCTION_DECL of this function. */
- tree decl;
+ rtx sjlj_fc;
+ rtx sjlj_exit_after;
+
+ htab_t GTY ((param_is (struct ehl_map_entry))) exception_handler_label_map;
+
+ VEC(tree,gc) *ttype_data;
+ varray_type ehspec_data;
+ varray_type action_record_data;
+
+ VEC(call_site_record,gc) *call_site_record;
+};
+
+#define pending_stack_adjust (crtl->expr.x_pending_stack_adjust)
+#define inhibit_defer_pop (crtl->expr.x_inhibit_defer_pop)
+#define saveregs_value (crtl->expr.x_saveregs_value)
+#define apply_args_value (crtl->expr.x_apply_args_value)
+#define forced_labels (crtl->expr.x_forced_labels)
+#define stack_pointer_delta (crtl->expr.x_stack_pointer_delta)
+
+struct gimple_df;
+struct temp_slot;
+typedef struct temp_slot *temp_slot_p;
+struct call_site_record;
+
+DEF_VEC_P(temp_slot_p);
+DEF_VEC_ALLOC_P(temp_slot_p,gc);
+struct ipa_opt_pass;
+typedef struct ipa_opt_pass *ipa_opt_pass;
+
+DEF_VEC_P(ipa_opt_pass);
+DEF_VEC_ALLOC_P(ipa_opt_pass,heap);
+
+enum function_frequency {
+ /* This function most likely won't be executed at all.
+ (set only when profile feedback is available or via function attribute). */
+ FUNCTION_FREQUENCY_UNLIKELY_EXECUTED,
+ /* The default value. */
+ FUNCTION_FREQUENCY_NORMAL,
+ /* Optimize this function hard
+ (set only when profile feedback is available or via function attribute). */
+ FUNCTION_FREQUENCY_HOT
+};
- /* Function containing this function, if any. */
- struct function *outer;
+struct varasm_status GTY(())
+{
+ /* If we're using a per-function constant pool, this is it. */
+ struct rtx_constant_pool *pool;
+
+ /* Number of tree-constants deferred during the expansion of this
+ function. */
+ unsigned int deferred_constants;
+};
+/* Information mainlined about RTL representation of incoming arguments. */
+struct incoming_args GTY(())
+{
/* Number of bytes of args popped by function being compiled on its return.
Zero if no bytes are to be popped.
May affect compilation of return insn or of function epilogue. */
/* If function's args have a fixed size, this is that size, in bytes.
Otherwise, it is -1.
May affect compilation of return insn or of function epilogue. */
- int args_size;
+ int size;
/* # bytes the prologue should push and pretend that the caller pushed them.
The prologue must do this, but only if parms can be passed in
registers. */
int pretend_args_size;
- /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is
- defined, the needed space is pushed by the prologue. */
- int outgoing_args_size;
-
/* This is the offset from the arg pointer to the place where the first
anonymous arg can be found, if there is one. */
rtx arg_offset_rtx;
/* Quantities of various kinds of registers
used for the current function's args. */
- CUMULATIVE_ARGS args_info;
+ CUMULATIVE_ARGS info;
+
+ /* The arg pointer hard register, or the pseudo into which it was copied. */
+ rtx internal_arg_pointer;
+};
+
+/* Data for function partitioning. */
+struct function_subsections GTY(())
+{
+ /* Assembly labels for the hot and cold text sections, to
+ be used by debugger functions for determining the size of text
+ sections. */
+
+ const char *hot_section_label;
+ const char *cold_section_label;
+ const char *hot_section_end_label;
+ const char *cold_section_end_label;
+
+ /* String to be used for name of cold text sections, via
+ targetm.asm_out.named_section. */
+
+ const char *unlikely_text_section_name;
+};
+
+/* Datastructures maintained for currently processed function in RTL form. */
+struct rtl_data GTY(())
+{
+ struct expr_status expr;
+ struct emit_status emit;
+ struct varasm_status varasm;
+ struct incoming_args args;
+ struct function_subsections subsections;
+ struct rtl_eh eh;
- /* If non-zero, an RTL expression for the location at which the current
+ /* For function.c */
+
+ /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is
+ defined, the needed space is pushed by the prologue. */
+ int outgoing_args_size;
+
+ /* If nonzero, an RTL expression for the location at which the current
function returns its result. If the current function returns its
result in a register, current_function_return_rtx will always be
the hard register containing the result. */
rtx return_rtx;
- /* The arg pointer hard register, or the pseudo into which it was copied. */
- rtx internal_arg_pointer;
-
- /* Language-specific reason why the current function cannot be made
- inline. */
- const char *cannot_inline;
-
/* Opaque pointer used by get_hard_reg_initial_val and
has_hard_reg_initial_val (see integrate.[hc]). */
struct initial_value_struct *hard_reg_initial_vals;
- /* Number of function calls seen so far in current function. */
- int x_function_call_count;
-
- /* List (chain of TREE_LIST) of LABEL_DECLs for all nonlocal labels
- (labels to which there can be nonlocal gotos from nested functions)
- in this function. */
- tree x_nonlocal_labels;
-
- /* List (chain of EXPR_LIST) of stack slots that hold the current handlers
- for nonlocal gotos. There is one for every nonlocal label in the
- function; this list matches the one in nonlocal_labels.
- Zero when function does not have nonlocal labels. */
- rtx x_nonlocal_goto_handler_slots;
+ /* A variable living at the top of the frame that holds a known value.
+ Used for detecting stack clobbers. */
+ tree stack_protect_guard;
/* List (chain of EXPR_LIST) of labels heading the current handlers for
nonlocal gotos. */
rtx x_nonlocal_goto_handler_labels;
- /* RTX for stack slot that holds the stack pointer value to restore
- for a nonlocal goto.
- Zero when function does not have nonlocal labels. */
- rtx x_nonlocal_goto_stack_level;
-
- /* Label that will go on parm cleanup code, if any.
- Jumping to this label runs cleanup code for parameters, if
- such code must be run. Following this code is the logical return
- label. */
- rtx x_cleanup_label;
-
/* Label that will go on function epilogue.
Jumping to this label serves as a "return" instruction
on machines which require execution of the epilogue on all returns. */
rtx x_return_label;
- /* List (chain of EXPR_LISTs) of pseudo-regs of SAVE_EXPRs.
- So we can mark them all live at the end of the function, if nonopt. */
- rtx x_save_expr_regs;
+ /* Label that will go on the end of function epilogue.
+ Jumping to this label serves as a "naked return" instruction
+ on machines which require execution of the epilogue on all returns. */
+ rtx x_naked_return_label;
/* List (chain of EXPR_LISTs) of all stack slots in this function.
Made for the sake of unshare_all_rtl. */
rtx x_stack_slot_list;
- /* Chain of all RTL_EXPRs that have insns in them. */
- tree x_rtl_expr_chain;
-
- /* Label to jump back to for tail recursion, or 0 if we have
- not yet needed one for this function. */
- rtx x_tail_recursion_label;
-
/* Place after which to insert the tail_recursion_label if we need one. */
- rtx x_tail_recursion_reentry;
+ rtx x_stack_check_probe_note;
/* Location at which to save the argument pointer if it will need to be
referenced. There are two cases where this is done: if nonlocal gotos
needed by inner routines. */
rtx x_arg_pointer_save_area;
- /* If the function returns non-void, we will emit a clobber of the
- return registers just in case the user fell off the end without
- returning a proper value. This is that insn. */
- rtx x_clobber_return_insn;
+ /* Dynamic Realign Argument Pointer used for realigning stack. */
+ rtx drap_reg;
/* Offset to end of allocated area of stack frame.
If stack grows down, this is the address of the last stack slot allocated.
If stack grows up, this is the address for the next slot. */
HOST_WIDE_INT x_frame_offset;
- /* List (chain of TREE_LISTs) of static chains for containing functions.
- Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
- in an RTL_EXPR in the TREE_VALUE. */
- tree x_context_display;
-
- /* List (chain of TREE_LISTs) of trampolines for nested functions.
- The trampoline sets up the static chain and jumps to the function.
- We supply the trampoline's address when the function's address is
- requested.
-
- Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
- in an RTL_EXPR in the TREE_VALUE. */
- tree x_trampoline_list;
-
/* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */
rtx x_parm_birth_insn;
- /* Last insn of those whose job was to put parms into their nominal
- homes. */
- rtx x_last_parm_insn;
-
- /* 1 + last pseudo register number possibly used for loading a copy
- of a parameter of this function. */
- unsigned int x_max_parm_reg;
-
- /* Vector indexed by REGNO, containing location on stack in which
- to put the parm which is nominally in pseudo register REGNO,
- if we discover that that parm must go in the stack. The highest
- element in this vector is one less than MAX_PARM_REG, above. */
- rtx *x_parm_reg_stack_loc;
+ /* List of all used temporaries allocated, by level. */
+ VEC(temp_slot_p,gc) *x_used_temp_slots;
- /* List of all temporaries allocated, both available and in use. */
- struct temp_slot *x_temp_slots;
+ /* List of available temp slots. */
+ struct temp_slot *x_avail_temp_slots;
/* Current nesting level for temporaries. */
int x_temp_slot_level;
- /* Current nesting level for variables in a block. */
- int x_var_temp_slot_level;
+ /* The largest alignment needed on the stack, including requirement
+ for outgoing stack alignment. */
+ unsigned int stack_alignment_needed;
- /* When temporaries are created by TARGET_EXPRs, they are created at
- this level of temp_slot_level, so that they can remain allocated
- until no longer needed. CLEANUP_POINT_EXPRs define the lifetime
- of TARGET_EXPRs. */
- int x_target_temp_slot_level;
-
- /* This slot is initialized as 0 and is added to
- during the nested function. */
- struct var_refs_queue *fixup_var_refs_queue;
-
- /* For integrate.c. */
- int inlinable;
- int no_debugging_symbols;
- /* This is in fact an rtvec. */
- void *original_arg_vector;
- tree original_decl_initial;
- /* Last insn of those whose job was to put parms into their nominal
- homes. */
- rtx inl_last_parm_insn;
- /* Highest label number in current function. */
- int inl_max_label_num;
-
- /* Profile label number. */
- int profile_label_no;
+ /* Preferred alignment of the end of stack frame, which is preferred
+ to call other functions. */
+ unsigned int preferred_stack_boundary;
- /* For md files. */
+ /* The minimum alignment of parameter stack. */
+ unsigned int parm_stack_boundary;
- /* tm.h can use this to store whatever it likes. */
- struct machine_function *machine;
/* The largest alignment of slot allocated on the stack. */
- int stack_alignment_needed;
- /* Preferred alignment of the end of stack frame. */
- int preferred_stack_boundary;
+ unsigned int max_used_stack_slot_alignment;
- /* Language-specific code can use this to store whatever it likes. */
- struct language_function *language;
+ /* The stack alignment estimated before reload, with consideration of
+ following factors:
+ 1. Alignment of local stack variables (max_used_stack_slot_alignment)
+ 2. Alignment requirement to call other functions
+ (preferred_stack_boundary)
+ 3. Alignment of non-local stack variables but might be spilled in
+ local stack. */
+ unsigned int stack_alignment_estimated;
/* For reorg. */
delay list for them is recorded here. */
rtx epilogue_delay_list;
- /* Collected bit flags. */
+ /* Nonzero if function being compiled called builtin_return_addr or
+ builtin_frame_address with nonzero count. */
+ bool accesses_prior_frames;
- /* Nonzero if function being compiled needs to be given an address
- where the value should be stored. */
- unsigned int returns_struct : 1;
+ /* Nonzero if the function calls __builtin_eh_return. */
+ bool calls_eh_return;
- /* Nonzero if function being compiled needs to
- return the address of where it has put a structure value. */
- unsigned int returns_pcc_struct : 1;
+ /* Nonzero if function saves all registers, e.g. if it has a nonlocal
+ label that can reach the exit block via non-exceptional paths. */
+ bool saves_all_registers;
+
+ /* Nonzero if function being compiled has nonlocal gotos to parent
+ function. */
+ bool has_nonlocal_goto;
- /* Nonzero if the current function returns a pointer type. */
- unsigned int returns_pointer : 1;
+ /* Nonzero if function being compiled has an asm statement. */
+ bool has_asm_statement;
- /* Nonzero if function being compiled needs to be passed a static chain. */
- unsigned int needs_context : 1;
+ /* This bit is used by the exception handling logic. It is set if all
+ calls (if any) are sibling calls. Such functions do not have to
+ have EH tables generated, as they cannot throw. A call to such a
+ function, however, should be treated as throwing if any of its callees
+ can throw. */
+ bool all_throwers_are_sibcalls;
- /* Nonzero if function being compiled can call setjmp. */
- unsigned int calls_setjmp : 1;
+ /* Nonzero if stack limit checking should be enabled in the current
+ function. */
+ bool limit_stack;
- /* Nonzero if function being compiled can call longjmp. */
- unsigned int calls_longjmp : 1;
-
- /* Nonzero if function being compiled can call alloca,
- either as a subroutine or builtin. */
- unsigned int calls_alloca : 1;
+ /* Nonzero if profiling code should be generated. */
+ bool profile;
- /* Nonzero if the function calls __builtin_eh_return. */
- unsigned int calls_eh_return : 1;
+ /* Nonzero if the current function uses the constant pool. */
+ bool uses_const_pool;
- /* Nonzero if function being compiled receives nonlocal gotos
- from nested functions. */
- unsigned int has_nonlocal_label : 1;
+ /* Nonzero if the current function uses pic_offset_table_rtx. */
+ bool uses_pic_offset_table;
- /* Nonzero if function being compiled has nonlocal gotos to parent
- function. */
- unsigned int has_nonlocal_goto : 1;
+ /* Nonzero if the current function needs an lsda for exception handling. */
+ bool uses_eh_lsda;
- /* Nonzero if function being compiled contains nested functions. */
- unsigned int contains_functions : 1;
+ /* Set when the tail call has been produced. */
+ bool tail_call_emit;
- /* Nonzero if the function being compiled issues a computed jump. */
- unsigned int has_computed_jump : 1;
+ /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */
+ bool arg_pointer_save_area_init;
- /* Nonzero if the current function is a thunk (a lightweight function that
- just adjusts one of its arguments and forwards to another function), so
- we should try to cut corners where we can. */
- unsigned int is_thunk : 1;
+ /* Nonzero if current function must be given a frame pointer.
+ Set in global.c if anything is allocated on the stack there. */
+ bool frame_pointer_needed;
- /* Nonzero if instrumentation calls for function entry and exit should be
- generated. */
- unsigned int instrument_entry_exit : 1;
+ /* When set, expand should optimize for speed. */
+ bool maybe_hot_insn_p;
- /* Nonzero if profiling code should be generated. */
- unsigned int profile : 1;
+ /* Nonzero if function stack realignment is needed. This flag may be
+ set twice: before and after reload. It is set before reload wrt
+ stack alignment estimation before reload. It will be changed after
+ reload if by then criteria of stack realignment is different.
+ The value set after reload is the accurate one and is finalized. */
+ bool stack_realign_needed;
- /* Nonzero if stack limit checking should be enabled in the current
+ /* Nonzero if function stack realignment is tried. This flag is set
+ only once before reload. It affects register elimination. This
+ is used to generate DWARF debug info for stack variables. */
+ bool stack_realign_tried;
+
+ /* Nonzero if function being compiled needs dynamic realigned
+ argument pointer (drap) if stack needs realigning. */
+ bool need_drap;
+
+ /* Nonzero if function stack realignment estimation is done, namely
+ stack_realign_needed flag has been set before reload wrt estimated
+ stack alignment info. */
+ bool stack_realign_processed;
+
+ /* Nonzero if function stack realignment has been finalized, namely
+ stack_realign_needed flag has been set and finalized after reload. */
+ bool stack_realign_finalized;
+
+ /* True if dbr_schedule has already been called for this function. */
+ bool dbr_scheduled_p;
+};
+
+#define return_label (crtl->x_return_label)
+#define naked_return_label (crtl->x_naked_return_label)
+#define stack_slot_list (crtl->x_stack_slot_list)
+#define parm_birth_insn (crtl->x_parm_birth_insn)
+#define frame_offset (crtl->x_frame_offset)
+#define stack_check_probe_note (crtl->x_stack_check_probe_note)
+#define arg_pointer_save_area (crtl->x_arg_pointer_save_area)
+#define used_temp_slots (crtl->x_used_temp_slots)
+#define avail_temp_slots (crtl->x_avail_temp_slots)
+#define temp_slot_level (crtl->x_temp_slot_level)
+#define nonlocal_goto_handler_labels (crtl->x_nonlocal_goto_handler_labels)
+#define frame_pointer_needed (crtl->frame_pointer_needed)
+#define stack_realign_fp (crtl->stack_realign_needed && !crtl->need_drap)
+#define stack_realign_drap (crtl->stack_realign_needed && crtl->need_drap)
+
+extern GTY(()) struct rtl_data x_rtl;
+
+/* Accessor to RTL datastructures. We keep them statically allocated now since
+ we never keep multiple functions. For threaded compiler we might however
+ want to do differently. */
+#define crtl (&x_rtl)
+
+/* This structure can save all the important global and static variables
+ describing the status of the current function. */
+
+struct function GTY(())
+{
+ struct eh_status *eh;
+
+ /* The control flow graph for this function. */
+ struct control_flow_graph *cfg;
+
+ /* GIMPLE body for this function. */
+ struct gimple_seq_d *gimple_body;
+
+ /* SSA and dataflow information. */
+ struct gimple_df *gimple_df;
+
+ /* The loops in this function. */
+ struct loops *x_current_loops;
+
+ /* Value histograms attached to particular statements. */
+ htab_t GTY((skip)) value_histograms;
+
+ /* For function.c. */
+
+ /* Points to the FUNCTION_DECL of this function. */
+ tree decl;
+
+ /* A PARM_DECL that should contain the static chain for this function.
+ It will be initialized at the beginning of the function. */
+ tree static_chain_decl;
+
+ /* An expression that contains the non-local goto save area. The first
+ word is the saved frame pointer and the second is the saved stack
+ pointer. */
+ tree nonlocal_goto_save_area;
+
+ /* List of function local variables, functions, types and constants. */
+ tree local_decls;
+
+ /* For md files. */
+
+ /* tm.h can use this to store whatever it likes. */
+ struct machine_function * GTY ((maybe_undef)) machine;
+
+ /* Language-specific code can use this to store whatever it likes. */
+ struct language_function * language;
+
+ /* Used types hash table. */
+ htab_t GTY ((param_is (union tree_node))) used_types_hash;
+
+ /* Last statement uid. */
+ int last_stmt_uid;
+
+ /* Function sequence number for profiling, debugging, etc. */
+ int funcdef_no;
+
+ /* Line number of the start of the function for debugging purposes. */
+ location_t function_start_locus;
+
+ /* Line number of the end of the function. */
+ location_t function_end_locus;
+
+ /* Properties used by the pass manager. */
+ unsigned int curr_properties;
+ unsigned int last_verified;
+ /* Interprocedural passes scheduled to have their transform functions
+ applied next time we execute local pass on them. We maintain it
+ per-function in order to allow IPA passes to introduce new functions. */
+ VEC(ipa_opt_pass,heap) * GTY((skip)) ipa_transforms_to_apply;
+
+ /* Collected bit flags. */
+
+ /* Number of units of general registers that need saving in stdarg
+ function. What unit is depends on the backend, either it is number
+ of bytes, or it can be number of registers. */
+ unsigned int va_list_gpr_size : 8;
+
+ /* Number of units of floating point registers that need saving in stdarg
function. */
- unsigned int limit_stack : 1;
+ unsigned int va_list_fpr_size : 8;
- /* Nonzero if current function uses varargs.h or equivalent.
- Zero for functions that use stdarg.h. */
- unsigned int varargs : 1;
- /* Nonzero if current function uses stdarg.h or equivalent.
- Zero for functions that use varargs.h. */
- unsigned int stdarg : 1;
+ /* How commonly executed the function is. Initialized during branch
+ probabilities pass. */
+ ENUM_BITFIELD (function_frequency) function_frequency : 2;
+
+ /* Nonzero if function being compiled can call setjmp. */
+ unsigned int calls_setjmp : 1;
+
+ /* Nonzero if function being compiled can call alloca,
+ either as a subroutine or builtin. */
+ unsigned int calls_alloca : 1;
+
+ /* Nonzero if function being compiled receives nonlocal gotos
+ from nested functions. */
+ unsigned int has_nonlocal_label : 1;
- /* Nonzero if this function is being processed in function-at-a-time
- mode. In other words, if all tree structure for this function,
- including the BLOCK tree, is created before RTL generation
- commences. */
- unsigned int x_whole_function_mode_p : 1;
+ /* Nonzero if current function uses stdarg.h or equivalent. */
+ unsigned int stdarg : 1;
/* Nonzero if the back-end should not keep track of expressions that
determine the size of variable-sized objects. Normally, such
variable-sized type, then the size of the parameter is computed
when the function body is entered. However, some front-ends do
not desire this behavior. */
- unsigned int x_dont_save_pending_sizes_p : 1;
+ unsigned int dont_save_pending_sizes_p : 1;
- /* Nonzero if the current function uses the constant pool. */
- unsigned int uses_const_pool : 1;
+ unsigned int after_inlining : 1;
+ unsigned int always_inline_functions_inlined : 1;
- /* Nonzero if the current function uses pic_offset_table_rtx. */
- unsigned int uses_pic_offset_table : 1;
+ /* Fields below this point are not set for abstract functions; see
+ allocate_struct_function. */
- /* Nonzero if the current function needs an lsda for exception handling. */
- unsigned int uses_eh_lsda : 1;
+ /* Nonzero if function being compiled needs to be given an address
+ where the value should be stored. */
+ unsigned int returns_struct : 1;
- /* Nonzero if code to initialize arg_pointer_save_area has been emited. */
- unsigned int arg_pointer_save_area_init : 1;
+ /* Nonzero if function being compiled needs to
+ return the address of where it has put a structure value. */
+ unsigned int returns_pcc_struct : 1;
+
+ /* Nonzero if pass_tree_profile was run on this function. */
+ unsigned int after_tree_profile : 1;
+
+ /* Nonzero if this function has local DECL_HARD_REGISTER variables.
+ In this case code motion has to be done more carefully. */
+ unsigned int has_local_explicit_reg_vars : 1;
+
+ /* Nonzero if the current function is a thunk, i.e., a lightweight
+ function implemented by the output_mi_thunk hook) that just
+ adjusts one of its arguments and forwards to another
+ function. */
+ unsigned int is_thunk : 1;
};
+/* If va_list_[gf]pr_size is set to this, it means we don't know how
+ many units need to be saved. */
+#define VA_LIST_MAX_GPR_SIZE 255
+#define VA_LIST_MAX_FPR_SIZE 255
+
/* The function currently being compiled. */
-extern struct function *cfun;
+extern GTY(()) struct function *cfun;
+
+/* In order to ensure that cfun is not set directly, we redefine it so
+ that it is not an lvalue. Rather than assign to cfun, use
+ push_cfun or set_cfun. */
+#define cfun (cfun + 0)
/* Nonzero if we've already converted virtual regs to hard regs. */
extern int virtuals_instantiated;
+/* Nonzero if at least one trampoline has been created. */
+extern int trampolines_created;
+
+struct types_used_by_vars_entry GTY(()) {
+ tree type;
+ tree var_decl;
+};
+
+/* Hash table making the relationship between a global variable
+ and the types it references in its initializer. The key of the
+ entry is a referenced type, and the value is the DECL of the global
+ variable. types_use_by_vars_do_hash and types_used_by_vars_eq below are
+ the hash and equality functions to use for this hash table. */
+extern GTY((param_is (struct types_used_by_vars_entry))) htab_t
+ types_used_by_vars_hash;
+
+hashval_t types_used_by_vars_do_hash (const void*);
+int types_used_by_vars_eq (const void *, const void *);
+void types_used_by_var_decl_insert (tree type, tree var_decl);
+
+/* During parsing of a global variable, this linked list points to
+ the list of types referenced by the global variable. */
+extern GTY(()) tree types_used_by_cur_var_decl;
+
+
+/* cfun shouldn't be set directly; use one of these functions instead. */
+extern void set_cfun (struct function *new_cfun);
+extern void push_cfun (struct function *new_cfun);
+extern void pop_cfun (void);
+extern void instantiate_decl_rtl (rtx x);
+
/* For backward compatibility... eventually these should all go away. */
-#define current_function_name (cfun->name)
-#define current_function_pops_args (cfun->pops_args)
-#define current_function_returns_struct (cfun->returns_struct)
-#define current_function_returns_pcc_struct (cfun->returns_pcc_struct)
-#define current_function_returns_pointer (cfun->returns_pointer)
-#define current_function_needs_context (cfun->needs_context)
-#define current_function_calls_setjmp (cfun->calls_setjmp)
-#define current_function_calls_alloca (cfun->calls_alloca)
-#define current_function_calls_longjmp (cfun->calls_longjmp)
-#define current_function_calls_eh_return (cfun->calls_eh_return)
-#define current_function_has_computed_jump (cfun->has_computed_jump)
-#define current_function_contains_functions (cfun->contains_functions)
-#define current_function_is_thunk (cfun->is_thunk)
-#define current_function_args_info (cfun->args_info)
-#define current_function_args_size (cfun->args_size)
-#define current_function_pretend_args_size (cfun->pretend_args_size)
-#define current_function_outgoing_args_size (cfun->outgoing_args_size)
-#define current_function_arg_offset_rtx (cfun->arg_offset_rtx)
-#define current_function_varargs (cfun->varargs)
-#define current_function_stdarg (cfun->stdarg)
-#define current_function_internal_arg_pointer (cfun->internal_arg_pointer)
-#define current_function_return_rtx (cfun->return_rtx)
-#define current_function_instrument_entry_exit (cfun->instrument_entry_exit)
-#define current_function_profile (cfun->profile)
-#define current_function_profile_label_no (cfun->profile_label_no)
-#define current_function_limit_stack (cfun->limit_stack)
-#define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table)
-#define current_function_uses_const_pool (cfun->uses_const_pool)
-#define current_function_cannot_inline (cfun->cannot_inline)
-#define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
-#define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
-#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
-
-#define max_parm_reg (cfun->x_max_parm_reg)
-#define parm_reg_stack_loc (cfun->x_parm_reg_stack_loc)
-#define cleanup_label (cfun->x_cleanup_label)
-#define return_label (cfun->x_return_label)
-#define save_expr_regs (cfun->x_save_expr_regs)
-#define stack_slot_list (cfun->x_stack_slot_list)
-#define parm_birth_insn (cfun->x_parm_birth_insn)
-#define frame_offset (cfun->x_frame_offset)
-#define tail_recursion_label (cfun->x_tail_recursion_label)
-#define tail_recursion_reentry (cfun->x_tail_recursion_reentry)
-#define arg_pointer_save_area (cfun->x_arg_pointer_save_area)
-#define rtl_expr_chain (cfun->x_rtl_expr_chain)
-#define last_parm_insn (cfun->x_last_parm_insn)
-#define context_display (cfun->x_context_display)
-#define trampoline_list (cfun->x_trampoline_list)
-#define function_call_count (cfun->x_function_call_count)
-#define temp_slots (cfun->x_temp_slots)
-#define temp_slot_level (cfun->x_temp_slot_level)
-#define target_temp_slot_level (cfun->x_target_temp_slot_level)
-#define var_temp_slot_level (cfun->x_var_temp_slot_level)
-#define nonlocal_labels (cfun->x_nonlocal_labels)
-#define nonlocal_goto_handler_slots (cfun->x_nonlocal_goto_handler_slots)
-#define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels)
-#define nonlocal_goto_stack_level (cfun->x_nonlocal_goto_stack_level)
-
-/* The FUNCTION_DECL for an inline function currently being expanded. */
-extern tree inline_function_decl;
-
-/* Given a function decl for a containing function,
- return the `struct function' for it. */
-struct function *find_function_data PARAMS ((tree));
-
-/* Set NOTE_BLOCK for each block note in the current function. */
-extern void identify_blocks PARAMS ((void));
+#define current_function_funcdef_no (cfun->funcdef_no)
+
+#define current_loops (cfun->x_current_loops)
+#define dom_computed (cfun->cfg->x_dom_computed)
+#define n_bbs_in_dom_tree (cfun->cfg->x_n_bbs_in_dom_tree)
+#define VALUE_HISTOGRAMS(fun) (fun)->value_histograms
/* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
and create duplicate blocks. */
-extern void reorder_blocks PARAMS ((void));
+extern void reorder_blocks (void);
/* Set BLOCK_NUMBER for all the blocks in FN. */
-extern void number_blocks PARAMS ((tree));
+extern void number_blocks (tree);
+
+extern void clear_block_marks (tree);
+extern tree blocks_nreverse (tree);
/* Return size needed for stack frame based on slots so far allocated.
This size counts from zero. It is not rounded to STACK_BOUNDARY;
the caller may have to do that. */
-extern HOST_WIDE_INT get_frame_size PARAMS ((void));
-/* Likewise, but for a different than the current function. */
-extern HOST_WIDE_INT get_func_frame_size PARAMS ((struct function *));
-
-/* These variables hold pointers to functions to create and destroy
- target specific, per-function data structures. */
-extern void (*init_machine_status) PARAMS ((struct function *));
-extern void (*free_machine_status) PARAMS ((struct function *));
-/* This variable holds a pointer to a function to register any
- data items in the target specific, per-function data structure
- that will need garbage collection. */
-extern void (*mark_machine_status) PARAMS ((struct function *));
-
-/* Likewise, but for language-specific data. */
-extern void (*init_lang_status) PARAMS ((struct function *));
-extern void (*mark_lang_status) PARAMS ((struct function *));
-extern void (*save_lang_status) PARAMS ((struct function *));
-extern void (*restore_lang_status) PARAMS ((struct function *));
-extern void (*free_lang_status) PARAMS ((struct function *));
+extern HOST_WIDE_INT get_frame_size (void);
-/* Save and restore status information for a nested function. */
-extern void restore_emit_status PARAMS ((struct function *));
-extern void free_after_parsing PARAMS ((struct function *));
-extern void free_after_compilation PARAMS ((struct function *));
+/* Issue an error message and return TRUE if frame OFFSET overflows in
+ the signed target pointer arithmetics for function FUNC. Otherwise
+ return FALSE. */
+extern bool frame_offset_overflow (HOST_WIDE_INT, tree);
-extern void init_varasm_status PARAMS ((struct function *));
-extern void free_varasm_status PARAMS ((struct function *));
-extern void free_emit_status PARAMS ((struct function *));
-extern void free_stmt_status PARAMS ((struct function *));
-extern void free_eh_status PARAMS ((struct function *));
-extern void free_expr_status PARAMS ((struct function *));
+/* A pointer to a function to create target specific, per-function
+ data structures. */
+extern struct machine_function * (*init_machine_status) (void);
-extern rtx get_first_block_beg PARAMS ((void));
+/* Save and restore status information for a nested function. */
+extern void free_after_parsing (struct function *);
+extern void free_after_compilation (struct function *);
+
+extern void init_varasm_status (void);
#ifdef RTX_CODE
-extern void diddle_return_value PARAMS ((void (*)(rtx, void*), void*));
-extern void clobber_return_register PARAMS ((void));
-extern void use_return_register PARAMS ((void));
+extern void diddle_return_value (void (*)(rtx, void*), void*);
+extern void clobber_return_register (void);
#endif
-extern rtx get_arg_pointer_save_area PARAMS ((struct function *));
+extern rtx get_arg_pointer_save_area (void);
+
+/* Returns the name of the current function. */
+extern const char *current_function_name (void);
+/* Returns the assembler name (raw, mangled) of the current function. */
+extern const char *current_function_assembler_name (void);
+
+extern void do_warn_unused_parameter (tree);
+
+extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
+extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode,
+ tree, bool);
-extern void init_virtual_regs PARAMS ((struct emit_status *));
+extern void used_types_insert (tree);
-/* Called once, at initialization, to initialize function.c. */
-extern void init_function_once PARAMS ((void));
+extern int get_next_funcdef_no (void);
+#endif /* GCC_FUNCTION_H */
projects / msp430-gcc.git / blobdiff