/* Define control and data flow tables, and regsets.
- Copyright (C) 1987, 1997, 1998, 1999, 2000, 2001, 2002, 2003
- Free Software Foundation, Inc.
+ Copyright (C) 1987, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ 2005, 2006, 2007, 2008 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/>. */
#ifndef GCC_BASIC_BLOCK_H
#define GCC_BASIC_BLOCK_H
#include "sbitmap.h"
#include "varray.h"
#include "partition.h"
+#include "hard-reg-set.h"
+#include "predict.h"
+#include "vec.h"
+#include "function.h"
/* Head of register set linked list. */
typedef bitmap_head regset_head;
+
/* A pointer to a regset_head. */
typedef bitmap regset;
+/* Allocate a register set with oballoc. */
+#define ALLOC_REG_SET(OBSTACK) BITMAP_ALLOC (OBSTACK)
+
+/* Do any cleanup needed on a regset when it is no longer used. */
+#define FREE_REG_SET(REGSET) BITMAP_FREE (REGSET)
+
/* Initialize a new regset. */
-#define INIT_REG_SET(HEAD) bitmap_initialize (HEAD)
+#define INIT_REG_SET(HEAD) bitmap_initialize (HEAD, ®_obstack)
/* Clear a register set by freeing up the linked list. */
#define CLEAR_REG_SET(HEAD) bitmap_clear (HEAD)
#define REG_SET_EQUAL_P(A, B) bitmap_equal_p (A, B)
/* `and' a register set with a second register set. */
-#define AND_REG_SET(TO, FROM) bitmap_operation (TO, TO, FROM, BITMAP_AND)
+#define AND_REG_SET(TO, FROM) bitmap_and_into (TO, FROM)
/* `and' the complement of a register set with a register set. */
-#define AND_COMPL_REG_SET(TO, FROM) \
- bitmap_operation (TO, TO, FROM, BITMAP_AND_COMPL)
+#define AND_COMPL_REG_SET(TO, FROM) bitmap_and_compl_into (TO, FROM)
/* Inclusive or a register set with a second register set. */
-#define IOR_REG_SET(TO, FROM) bitmap_operation (TO, TO, FROM, BITMAP_IOR)
+#define IOR_REG_SET(TO, FROM) bitmap_ior_into (TO, FROM)
/* Exclusive or a register set with a second register set. */
-#define XOR_REG_SET(TO, FROM) bitmap_operation (TO, TO, FROM, BITMAP_XOR)
+#define XOR_REG_SET(TO, FROM) bitmap_xor_into (TO, FROM)
/* Or into TO the register set FROM1 `and'ed with the complement of FROM2. */
#define IOR_AND_COMPL_REG_SET(TO, FROM1, FROM2) \
- bitmap_ior_and_compl (TO, FROM1, FROM2)
+ bitmap_ior_and_compl_into (TO, FROM1, FROM2)
/* Clear a single register in a register set. */
#define CLEAR_REGNO_REG_SET(HEAD, REG) bitmap_clear_bit (HEAD, REG)
#define REGNO_REG_SET_P(TO, REG) bitmap_bit_p (TO, REG)
/* Copy the hard registers in a register set to the hard register set. */
-extern void reg_set_to_hard_reg_set PARAMS ((HARD_REG_SET *, bitmap));
+extern void reg_set_to_hard_reg_set (HARD_REG_SET *, const_bitmap);
#define REG_SET_TO_HARD_REG_SET(TO, FROM) \
do { \
CLEAR_HARD_REG_SET (TO); \
reg_set_to_hard_reg_set (&TO, FROM); \
} while (0)
+typedef bitmap_iterator reg_set_iterator;
+
/* Loop over all registers in REGSET, starting with MIN, setting REGNUM to the
register number and executing CODE for all registers that are set. */
-#define EXECUTE_IF_SET_IN_REG_SET(REGSET, MIN, REGNUM, CODE) \
- EXECUTE_IF_SET_IN_BITMAP (REGSET, MIN, REGNUM, CODE)
+#define EXECUTE_IF_SET_IN_REG_SET(REGSET, MIN, REGNUM, RSI) \
+ EXECUTE_IF_SET_IN_BITMAP (REGSET, MIN, REGNUM, RSI)
/* Loop over all registers in REGSET1 and REGSET2, starting with MIN, setting
REGNUM to the register number and executing CODE for all registers that are
set in the first regset and not set in the second. */
-#define EXECUTE_IF_AND_COMPL_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, CODE) \
- EXECUTE_IF_AND_COMPL_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, CODE)
+#define EXECUTE_IF_AND_COMPL_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, RSI) \
+ EXECUTE_IF_AND_COMPL_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, RSI)
/* Loop over all registers in REGSET1 and REGSET2, starting with MIN, setting
REGNUM to the register number and executing CODE for all registers that are
set in both regsets. */
-#define EXECUTE_IF_AND_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, CODE) \
- EXECUTE_IF_AND_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, CODE)
+#define EXECUTE_IF_AND_IN_REG_SET(REGSET1, REGSET2, MIN, REGNUM, RSI) \
+ EXECUTE_IF_AND_IN_BITMAP (REGSET1, REGSET2, MIN, REGNUM, RSI) \
-/* Allocate a register set with oballoc. */
-#define OBSTACK_ALLOC_REG_SET(OBSTACK) BITMAP_OBSTACK_ALLOC (OBSTACK)
+/* Same information as REGS_INVALIDATED_BY_CALL but in regset form to be used
+ in dataflow more conveniently. */
-/* Initialize a register set. Returns the new register set. */
-#define INITIALIZE_REG_SET(HEAD) bitmap_initialize (&HEAD)
+extern regset regs_invalidated_by_call_regset;
-/* Do any cleanup needed on a regset when it is no longer used. */
-#define FREE_REG_SET(REGSET) BITMAP_FREE(REGSET)
-
-/* Do any one-time initializations needed for regsets. */
-#define INIT_ONCE_REG_SET() BITMAP_INIT_ONCE ()
-
-/* Grow any tables needed when the number of registers is calculated
- or extended. For the linked list allocation, nothing needs to
- be done, other than zero the statistics on the first allocation. */
-#define MAX_REGNO_REG_SET(NUM_REGS, NEW_P, RENUMBER_P)
-
-/* Type we use to hold basic block counters. Should be at least 64bit. */
+/* Type we use to hold basic block counters. Should be at least
+ 64bit. Although a counter cannot be negative, we use a signed
+ type, because erroneous negative counts can be generated when the
+ flow graph is manipulated by various optimizations. A signed type
+ makes those easy to detect. */
typedef HOST_WIDEST_INT gcov_type;
/* Control flow edge information. */
-typedef struct edge_def {
- /* Links through the predecessor and successor lists. */
- struct edge_def *pred_next, *succ_next;
-
+struct edge_def GTY(())
+{
/* The two blocks at the ends of the edge. */
- struct basic_block_def *src, *dest;
+ struct basic_block_def *src;
+ struct basic_block_def *dest;
/* Instructions queued on the edge. */
- rtx insns;
+ union edge_def_insns {
+ gimple_seq GTY ((tag ("true"))) g;
+ rtx GTY ((tag ("false"))) r;
+ } GTY ((desc ("current_ir_type () == IR_GIMPLE"))) insns;
/* Auxiliary info specific to a pass. */
- void *aux;
+ PTR GTY ((skip (""))) aux;
+
+ /* Location of any goto implicit in the edge and associated BLOCK. */
+ tree goto_block;
+ location_t goto_locus;
+
+ /* The index number corresponding to this edge in the edge vector
+ dest->preds. */
+ unsigned int dest_idx;
int flags; /* see EDGE_* below */
int probability; /* biased by REG_BR_PROB_BASE */
gcov_type count; /* Expected number of executions calculated
in profile.c */
-} *edge;
+};
-#define EDGE_FALLTHRU 1
-#define EDGE_ABNORMAL 2
-#define EDGE_ABNORMAL_CALL 4
-#define EDGE_EH 8
-#define EDGE_FAKE 16
-#define EDGE_DFS_BACK 32
+typedef struct edge_def *edge;
+typedef const struct edge_def *const_edge;
+DEF_VEC_P(edge);
+DEF_VEC_ALLOC_P(edge,gc);
+DEF_VEC_ALLOC_P(edge,heap);
+
+#define EDGE_FALLTHRU 1 /* 'Straight line' flow */
+#define EDGE_ABNORMAL 2 /* Strange flow, like computed
+ label, or eh */
+#define EDGE_ABNORMAL_CALL 4 /* Call with abnormal exit
+ like an exception, or sibcall */
+#define EDGE_EH 8 /* Exception throw */
+#define EDGE_FAKE 16 /* Not a real edge (profile.c) */
+#define EDGE_DFS_BACK 32 /* A backwards edge */
+#define EDGE_CAN_FALLTHRU 64 /* Candidate for straight line
+ flow. */
+#define EDGE_IRREDUCIBLE_LOOP 128 /* Part of irreducible loop. */
+#define EDGE_SIBCALL 256 /* Edge from sibcall to exit. */
+#define EDGE_LOOP_EXIT 512 /* Exit of a loop. */
+#define EDGE_TRUE_VALUE 1024 /* Edge taken when controlling
+ predicate is nonzero. */
+#define EDGE_FALSE_VALUE 2048 /* Edge taken when controlling
+ predicate is zero. */
+#define EDGE_EXECUTABLE 4096 /* Edge is executable. Only
+ valid during SSA-CCP. */
+#define EDGE_CROSSING 8192 /* Edge crosses between hot
+ and cold sections, when we
+ do partitioning. */
+#define EDGE_ALL_FLAGS 16383
#define EDGE_COMPLEX (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL | EDGE_EH)
+/* Counter summary from the last set of coverage counts read by
+ profile.c. */
+extern const struct gcov_ctr_summary *profile_info;
+
+/* Declared in cfgloop.h. */
+struct loop;
+
+/* Declared in tree-flow.h. */
+struct edge_prediction;
+struct rtl_bb_info;
/* A basic block is a sequence of instructions with only entry and
only one exit. If any one of the instructions are executed, they
basic blocks. */
/* Basic block information indexed by block number. */
-typedef struct basic_block_def {
- /* The first and last insns of the block. */
- rtx head, end;
+struct basic_block_def GTY((chain_next ("%h.next_bb"), chain_prev ("%h.prev_bb")))
+{
+ /* The edges into and out of the block. */
+ VEC(edge,gc) *preds;
+ VEC(edge,gc) *succs;
- /* The first and last trees of the block. */
- tree head_tree;
- tree end_tree;
+ /* Auxiliary info specific to a pass. */
+ PTR GTY ((skip (""))) aux;
- /* The edges into and out of the block. */
- edge pred, succ;
+ /* Innermost loop containing the block. */
+ struct loop *loop_father;
- /* Liveness info. */
+ /* The dominance and postdominance information node. */
+ struct et_node * GTY ((skip (""))) dom[2];
- /* The registers that are modified within this in block. */
- regset local_set;
- /* The registers that are conditionally modified within this block.
- In other words, registers that are set only as part of a
- COND_EXEC. */
- regset cond_local_set;
- /* The registers that are live on entry to this block.
+ /* Previous and next blocks in the chain. */
+ struct basic_block_def *prev_bb;
+ struct basic_block_def *next_bb;
- Note that in SSA form, global_live_at_start does not reflect the
- use of regs in phi functions, since the liveness of these regs
- may depend on which edge was taken into the block. */
- regset global_live_at_start;
- /* The registers that are live on exit from this block. */
- regset global_live_at_end;
+ union basic_block_il_dependent {
+ struct gimple_bb_info * GTY ((tag ("0"))) gimple;
+ struct rtl_bb_info * GTY ((tag ("1"))) rtl;
+ } GTY ((desc ("((%1.flags & BB_RTL) != 0)"))) il;
- /* Auxiliary info specific to a pass. */
- void *aux;
+ /* Expected number of executions: calculated in profile.c. */
+ gcov_type count;
/* The index of this block. */
int index;
/* The loop depth of this block. */
int loop_depth;
- /* Expected number of executions: calculated in profile.c. */
- gcov_type count;
-
/* Expected frequency. Normalized to be in range 0 to BB_FREQ_MAX. */
int frequency;
/* Various flags. See BB_* below. */
int flags;
-} *basic_block;
-
-#define BB_FREQ_MAX 10000
-
-/* Masks for basic_block.flags. */
-#define BB_REACHABLE 1
-
-/* Number of basic blocks in the current function. */
-
-extern int n_basic_blocks;
-
-/* Number of edges in the current function. */
-
-extern int n_edges;
-
-/* Index by basic block number, get basic block struct info. */
-
-extern varray_type basic_block_info;
-
-#define BASIC_BLOCK(N) (VARRAY_BB (basic_block_info, (N)))
-
-/* What registers are live at the setjmp call. */
-
-extern regset regs_live_at_setjmp;
-
-/* Special labels found during CFG build. */
+};
-extern rtx label_value_list, tail_recursion_label_list;
+struct rtl_bb_info GTY(())
+{
+ /* The first and last insns of the block. */
+ rtx head_;
+ rtx end_;
-extern struct obstack flow_obstack;
+ /* In CFGlayout mode points to insn notes/jumptables to be placed just before
+ and after the block. */
+ rtx header;
+ rtx footer;
-/* Indexed by n, gives number of basic block that (REG n) is used in.
- If the value is REG_BLOCK_GLOBAL (-2),
- it means (REG n) is used in more than one basic block.
- REG_BLOCK_UNKNOWN (-1) means it hasn't been seen yet so we don't know.
- This information remains valid for the rest of the compilation
- of the current function; it is used to control register allocation. */
+ /* This field is used by the bb-reorder and tracer passes. */
+ int visited;
+};
-#define REG_BLOCK_UNKNOWN -1
-#define REG_BLOCK_GLOBAL -2
+struct gimple_bb_info GTY(())
+{
+ /* Sequence of statements in this block. */
+ gimple_seq seq;
-#define REG_BASIC_BLOCK(N) (VARRAY_REG (reg_n_info, N)->basic_block)
-\f
-/* Stuff for recording basic block info. */
+ /* PHI nodes for this block. */
+ gimple_seq phi_nodes;
+};
-#define BLOCK_HEAD(B) (BASIC_BLOCK (B)->head)
-#define BLOCK_END(B) (BASIC_BLOCK (B)->end)
+typedef struct basic_block_def *basic_block;
+typedef const struct basic_block_def *const_basic_block;
-#define BLOCK_HEAD_TREE(B) (BASIC_BLOCK (B)->head_tree)
-#define BLOCK_END_TREE(B) (BASIC_BLOCK (B)->end_tree)
+DEF_VEC_P(basic_block);
+DEF_VEC_ALLOC_P(basic_block,gc);
+DEF_VEC_ALLOC_P(basic_block,heap);
-/* Special block numbers [markers] for entry and exit. */
-#define ENTRY_BLOCK (-1)
-#define EXIT_BLOCK (-2)
+#define BB_FREQ_MAX 10000
-/* Special block number not valid for any block. */
-#define INVALID_BLOCK (-3)
+/* Masks for basic_block.flags.
-/* Similarly, block pointers for the edge list. */
-extern struct basic_block_def entry_exit_blocks[2];
-#define ENTRY_BLOCK_PTR (&entry_exit_blocks[0])
-#define EXIT_BLOCK_PTR (&entry_exit_blocks[1])
+ BB_HOT_PARTITION and BB_COLD_PARTITION should be preserved throughout
+ the compilation, so they are never cleared.
-extern varray_type basic_block_for_insn;
-#define BLOCK_FOR_INSN(INSN) VARRAY_BB (basic_block_for_insn, INSN_UID (INSN))
-#define BLOCK_NUM(INSN) (BLOCK_FOR_INSN (INSN)->index + 0)
+ All other flags may be cleared by clear_bb_flags(). It is generally
+ a bad idea to rely on any flags being up-to-date. */
-extern void compute_bb_for_insn PARAMS ((int));
-extern void free_bb_for_insn PARAMS ((void));
-extern void update_bb_for_insn PARAMS ((basic_block));
-extern void set_block_for_insn PARAMS ((rtx, basic_block));
-
-extern void free_basic_block_vars PARAMS ((int));
-
-extern edge split_block PARAMS ((basic_block, rtx));
-extern basic_block split_edge PARAMS ((edge));
-extern void insert_insn_on_edge PARAMS ((rtx, edge));
-extern void commit_edge_insertions PARAMS ((void));
-extern void remove_fake_edges PARAMS ((void));
-extern void add_noreturn_fake_exit_edges PARAMS ((void));
-extern void connect_infinite_loops_to_exit PARAMS ((void));
-extern int flow_call_edges_add PARAMS ((sbitmap));
-extern edge cached_make_edge PARAMS ((sbitmap *, basic_block,
- basic_block, int));
-extern edge make_edge PARAMS ((basic_block,
- basic_block, int));
-extern edge make_single_succ_edge PARAMS ((basic_block,
- basic_block, int));
-extern void remove_edge PARAMS ((edge));
-extern void redirect_edge_succ PARAMS ((edge, basic_block));
-extern edge redirect_edge_succ_nodup PARAMS ((edge, basic_block));
-extern void redirect_edge_pred PARAMS ((edge, basic_block));
-extern basic_block create_basic_block_structure PARAMS ((int, rtx, rtx, rtx));
-extern basic_block create_basic_block PARAMS ((int, rtx, rtx));
-extern int flow_delete_block PARAMS ((basic_block));
-extern int flow_delete_block_noexpunge PARAMS ((basic_block));
-extern void merge_blocks_nomove PARAMS ((basic_block, basic_block));
-extern void tidy_fallthru_edge PARAMS ((edge, basic_block,
- basic_block));
-extern void tidy_fallthru_edges PARAMS ((void));
-extern void flow_reverse_top_sort_order_compute PARAMS ((int *));
-extern int flow_depth_first_order_compute PARAMS ((int *, int *));
-extern void flow_preorder_transversal_compute PARAMS ((int *));
-extern void dump_edge_info PARAMS ((FILE *, edge, int));
-extern void clear_edges PARAMS ((void));
-extern void mark_critical_edges PARAMS ((void));
-extern rtx first_insn_after_basic_block_note PARAMS ((basic_block));
-
-/* Structure to hold information for each natural loop. */
-struct loop
+enum bb_flags
{
- /* Index into loops array. */
- int num;
-
- /* Basic block of loop header. */
- basic_block header;
-
- /* Basic block of loop latch. */
- basic_block latch;
-
- /* Basic block of loop pre-header or NULL if it does not exist. */
- basic_block pre_header;
-
- /* Array of edges along the pre-header extended basic block trace.
- The source of the first edge is the root node of pre-header
- extended basic block, if it exists. */
- edge *pre_header_edges;
-
- /* Number of edges along the pre_header extended basic block trace. */
- int num_pre_header_edges;
-
- /* The first block in the loop. This is not necessarily the same as
- the loop header. */
- basic_block first;
-
- /* The last block in the loop. This is not necessarily the same as
- the loop latch. */
- basic_block last;
+ /* Only set on blocks that have just been created by create_bb. */
+ BB_NEW = 1 << 0,
- /* Bitmap of blocks contained within the loop. */
- sbitmap nodes;
+ /* Set by find_unreachable_blocks. Do not rely on this being set in any
+ pass. */
+ BB_REACHABLE = 1 << 1,
- /* Number of blocks contained within the loop. */
- int num_nodes;
+ /* Set for blocks in an irreducible loop by loop analysis. */
+ BB_IRREDUCIBLE_LOOP = 1 << 2,
- /* Array of edges that enter the loop. */
- edge *entry_edges;
+ /* Set on blocks that may actually not be single-entry single-exit block. */
+ BB_SUPERBLOCK = 1 << 3,
- /* Number of edges that enter the loop. */
- int num_entries;
+ /* Set on basic blocks that the scheduler should not touch. This is used
+ by SMS to prevent other schedulers from messing with the loop schedule. */
+ BB_DISABLE_SCHEDULE = 1 << 4,
- /* Array of edges that exit the loop. */
- edge *exit_edges;
+ /* Set on blocks that should be put in a hot section. */
+ BB_HOT_PARTITION = 1 << 5,
- /* Number of edges that exit the loop. */
- int num_exits;
+ /* Set on blocks that should be put in a cold section. */
+ BB_COLD_PARTITION = 1 << 6,
- /* Bitmap of blocks that dominate all exits of the loop. */
- sbitmap exits_doms;
+ /* Set on block that was duplicated. */
+ BB_DUPLICATED = 1 << 7,
- /* The loop nesting depth. */
- int depth;
+ /* Set if the label at the top of this block is the target of a non-local goto. */
+ BB_NON_LOCAL_GOTO_TARGET = 1 << 8,
- /* The height of the loop (enclosed loop levels) within the loop
- hierarchy tree. */
- int level;
+ /* Set on blocks that are in RTL format. */
+ BB_RTL = 1 << 9 ,
- /* The outer (parent) loop or NULL if outermost loop. */
- struct loop *outer;
+ /* Set on blocks that are forwarder blocks.
+ Only used in cfgcleanup.c. */
+ BB_FORWARDER_BLOCK = 1 << 10,
- /* The first inner (child) loop or NULL if innermost loop. */
- struct loop *inner;
+ /* Set on blocks that cannot be threaded through.
+ Only used in cfgcleanup.c. */
+ BB_NONTHREADABLE_BLOCK = 1 << 11
+};
- /* Link to the next (sibling) loop. */
- struct loop *next;
+/* Dummy flag for convenience in the hot/cold partitioning code. */
+#define BB_UNPARTITIONED 0
- /* Non-zero if the loop shares a header with another loop. */
- int shared;
+/* Partitions, to be used when partitioning hot and cold basic blocks into
+ separate sections. */
+#define BB_PARTITION(bb) ((bb)->flags & (BB_HOT_PARTITION|BB_COLD_PARTITION))
+#define BB_SET_PARTITION(bb, part) do { \
+ basic_block bb_ = (bb); \
+ bb_->flags = ((bb_->flags & ~(BB_HOT_PARTITION|BB_COLD_PARTITION)) \
+ | (part)); \
+} while (0)
- /* Non-zero if the loop is invalid (e.g., contains setjmp.). */
- int invalid;
+#define BB_COPY_PARTITION(dstbb, srcbb) \
+ BB_SET_PARTITION (dstbb, BB_PARTITION (srcbb))
- /* Auxiliary info specific to a pass. */
- void *aux;
+/* State of dominance information. */
- /* The following are currently used by loop.c but they are likely to
- disappear as loop.c is converted to use the CFG. */
+enum dom_state
+{
+ DOM_NONE, /* Not computed at all. */
+ DOM_NO_FAST_QUERY, /* The data is OK, but the fast query data are not usable. */
+ DOM_OK /* Everything is ok. */
+};
- /* Non-zero if the loop has a NOTE_INSN_LOOP_VTOP. */
- rtx vtop;
+/* A structure to group all the per-function control flow graph data.
+ The x_* prefixing is necessary because otherwise references to the
+ fields of this struct are interpreted as the defines for backward
+ source compatibility following the definition of this struct. */
+struct control_flow_graph GTY(())
+{
+ /* Block pointers for the exit and entry of a function.
+ These are always the head and tail of the basic block list. */
+ basic_block x_entry_block_ptr;
+ basic_block x_exit_block_ptr;
- /* Non-zero if the loop has a NOTE_INSN_LOOP_CONT.
- A continue statement will generate a branch to NEXT_INSN (cont). */
- rtx cont;
+ /* Index by basic block number, get basic block struct info. */
+ VEC(basic_block,gc) *x_basic_block_info;
- /* The dominator of cont. */
- rtx cont_dominator;
+ /* Number of basic blocks in this flow graph. */
+ int x_n_basic_blocks;
- /* The NOTE_INSN_LOOP_BEG. */
- rtx start;
+ /* Number of edges in this flow graph. */
+ int x_n_edges;
- /* The NOTE_INSN_LOOP_END. */
- rtx end;
+ /* The first free basic block number. */
+ int x_last_basic_block;
- /* For a rotated loop that is entered near the bottom,
- this is the label at the top. Otherwise it is zero. */
- rtx top;
+ /* Mapping of labels to their associated blocks. At present
+ only used for the gimple CFG. */
+ VEC(basic_block,gc) *x_label_to_block_map;
- /* Place in the loop where control enters. */
- rtx scan_start;
+ enum profile_status {
+ PROFILE_ABSENT,
+ PROFILE_GUESSED,
+ PROFILE_READ
+ } x_profile_status;
- /* The position where to sink insns out of the loop. */
- rtx sink;
+ /* Whether the dominators and the postdominators are available. */
+ enum dom_state x_dom_computed[2];
- /* List of all LABEL_REFs which refer to code labels outside the
- loop. Used by routines that need to know all loop exits, such as
- final_biv_value and final_giv_value.
+ /* Number of basic blocks in the dominance tree. */
+ unsigned x_n_bbs_in_dom_tree[2];
- This does not include loop exits due to return instructions.
- This is because all bivs and givs are pseudos, and hence must be
- dead after a return, so the presense of a return does not affect
- any of the optimizations that use this info. It is simpler to
- just not include return instructions on this list. */
- rtx exit_labels;
+ /* Maximal number of entities in the single jumptable. Used to estimate
+ final flowgraph size. */
+ int max_jumptable_ents;
- /* The number of LABEL_REFs on exit_labels for this loop and all
- loops nested inside it. */
- int exit_count;
+ /* UIDs for LABEL_DECLs. */
+ int last_label_uid;
};
+/* Defines for accessing the fields of the CFG structure for function FN. */
+#define ENTRY_BLOCK_PTR_FOR_FUNCTION(FN) ((FN)->cfg->x_entry_block_ptr)
+#define EXIT_BLOCK_PTR_FOR_FUNCTION(FN) ((FN)->cfg->x_exit_block_ptr)
+#define basic_block_info_for_function(FN) ((FN)->cfg->x_basic_block_info)
+#define n_basic_blocks_for_function(FN) ((FN)->cfg->x_n_basic_blocks)
+#define n_edges_for_function(FN) ((FN)->cfg->x_n_edges)
+#define last_basic_block_for_function(FN) ((FN)->cfg->x_last_basic_block)
+#define label_to_block_map_for_function(FN) ((FN)->cfg->x_label_to_block_map)
+#define profile_status_for_function(FN) ((FN)->cfg->x_profile_status)
+
+#define BASIC_BLOCK_FOR_FUNCTION(FN,N) \
+ (VEC_index (basic_block, basic_block_info_for_function(FN), (N)))
+#define SET_BASIC_BLOCK_FOR_FUNCTION(FN,N,BB) \
+ (VEC_replace (basic_block, basic_block_info_for_function(FN), (N), (BB)))
+
+/* Defines for textual backward source compatibility. */
+#define ENTRY_BLOCK_PTR (cfun->cfg->x_entry_block_ptr)
+#define EXIT_BLOCK_PTR (cfun->cfg->x_exit_block_ptr)
+#define basic_block_info (cfun->cfg->x_basic_block_info)
+#define n_basic_blocks (cfun->cfg->x_n_basic_blocks)
+#define n_edges (cfun->cfg->x_n_edges)
+#define last_basic_block (cfun->cfg->x_last_basic_block)
+#define label_to_block_map (cfun->cfg->x_label_to_block_map)
+#define profile_status (cfun->cfg->x_profile_status)
+
+#define BASIC_BLOCK(N) (VEC_index (basic_block, basic_block_info, (N)))
+#define SET_BASIC_BLOCK(N,BB) (VEC_replace (basic_block, basic_block_info, (N), (BB)))
+
+/* For iterating over basic blocks. */
+#define FOR_BB_BETWEEN(BB, FROM, TO, DIR) \
+ for (BB = FROM; BB != TO; BB = BB->DIR)
+
+#define FOR_EACH_BB_FN(BB, FN) \
+ FOR_BB_BETWEEN (BB, (FN)->cfg->x_entry_block_ptr->next_bb, (FN)->cfg->x_exit_block_ptr, next_bb)
+
+#define FOR_EACH_BB(BB) FOR_EACH_BB_FN (BB, cfun)
+
+#define FOR_EACH_BB_REVERSE_FN(BB, FN) \
+ FOR_BB_BETWEEN (BB, (FN)->cfg->x_exit_block_ptr->prev_bb, (FN)->cfg->x_entry_block_ptr, prev_bb)
+
+#define FOR_EACH_BB_REVERSE(BB) FOR_EACH_BB_REVERSE_FN(BB, cfun)
+
+/* For iterating over insns in basic block. */
+#define FOR_BB_INSNS(BB, INSN) \
+ for ((INSN) = BB_HEAD (BB); \
+ (INSN) && (INSN) != NEXT_INSN (BB_END (BB)); \
+ (INSN) = NEXT_INSN (INSN))
+
+/* For iterating over insns in basic block when we might remove the
+ current insn. */
+#define FOR_BB_INSNS_SAFE(BB, INSN, CURR) \
+ for ((INSN) = BB_HEAD (BB), (CURR) = (INSN) ? NEXT_INSN ((INSN)): NULL; \
+ (INSN) && (INSN) != NEXT_INSN (BB_END (BB)); \
+ (INSN) = (CURR), (CURR) = (INSN) ? NEXT_INSN ((INSN)) : NULL)
+
+#define FOR_BB_INSNS_REVERSE(BB, INSN) \
+ for ((INSN) = BB_END (BB); \
+ (INSN) && (INSN) != PREV_INSN (BB_HEAD (BB)); \
+ (INSN) = PREV_INSN (INSN))
+
+#define FOR_BB_INSNS_REVERSE_SAFE(BB, INSN, CURR) \
+ for ((INSN) = BB_END (BB),(CURR) = (INSN) ? PREV_INSN ((INSN)) : NULL; \
+ (INSN) && (INSN) != PREV_INSN (BB_HEAD (BB)); \
+ (INSN) = (CURR), (CURR) = (INSN) ? PREV_INSN ((INSN)) : NULL)
+
+/* Cycles through _all_ basic blocks, even the fake ones (entry and
+ exit block). */
+
+#define FOR_ALL_BB(BB) \
+ for (BB = ENTRY_BLOCK_PTR; BB; BB = BB->next_bb)
+
+#define FOR_ALL_BB_FN(BB, FN) \
+ for (BB = ENTRY_BLOCK_PTR_FOR_FUNCTION (FN); BB; BB = BB->next_bb)
+
+extern bitmap_obstack reg_obstack;
-/* Structure to hold CFG information about natural loops within a function. */
-struct loops
-{
- /* Number of natural loops in the function. */
- int num;
-
- /* Maxium nested loop level in the function. */
- int levels;
-
- /* Array of natural loop descriptors (scanning this array in reverse order
- will find the inner loops before their enclosing outer loops). */
- struct loop *array;
-
- /* Pointer to root of loop heirachy tree. */
- struct loop *tree_root;
+\f
+/* Stuff for recording basic block info. */
- /* Information derived from the CFG. */
- struct cfg
- {
- /* The bitmap vector of dominators or NULL if not computed. */
- sbitmap *dom;
+#define BB_HEAD(B) (B)->il.rtl->head_
+#define BB_END(B) (B)->il.rtl->end_
- /* The ordering of the basic blocks in a depth first search. */
- int *dfs_order;
+/* Special block numbers [markers] for entry and exit. */
+#define ENTRY_BLOCK (0)
+#define EXIT_BLOCK (1)
- /* The reverse completion ordering of the basic blocks found in a
- depth first search. */
- int *rc_order;
- } cfg;
+/* The two blocks that are always in the cfg. */
+#define NUM_FIXED_BLOCKS (2)
- /* Headers shared by multiple loops that should be merged. */
- sbitmap shared_headers;
-};
-extern int flow_loops_find PARAMS ((struct loops *, int flags));
-extern int flow_loops_update PARAMS ((struct loops *, int flags));
-extern void flow_loops_free PARAMS ((struct loops *));
-extern void flow_loops_dump PARAMS ((const struct loops *, FILE *,
- void (*)(const struct loop *,
- FILE *, int), int));
-extern void flow_loop_dump PARAMS ((const struct loop *, FILE *,
- void (*)(const struct loop *,
- FILE *, int), int));
-extern int flow_loop_scan PARAMS ((struct loops *, struct loop *, int));
+#define BLOCK_NUM(INSN) (BLOCK_FOR_INSN (INSN)->index + 0)
+#define set_block_for_insn(INSN, BB) (BLOCK_FOR_INSN (INSN) = BB)
+
+extern void compute_bb_for_insn (void);
+extern unsigned int free_bb_for_insn (void);
+extern void update_bb_for_insn (basic_block);
+
+extern void insert_insn_on_edge (rtx, edge);
+basic_block split_edge_and_insert (edge, rtx);
+
+extern void commit_edge_insertions (void);
+
+extern void remove_fake_edges (void);
+extern void remove_fake_exit_edges (void);
+extern void add_noreturn_fake_exit_edges (void);
+extern void connect_infinite_loops_to_exit (void);
+extern edge unchecked_make_edge (basic_block, basic_block, int);
+extern edge cached_make_edge (sbitmap, basic_block, basic_block, int);
+extern edge make_edge (basic_block, basic_block, int);
+extern edge make_single_succ_edge (basic_block, basic_block, int);
+extern void remove_edge_raw (edge);
+extern void redirect_edge_succ (edge, basic_block);
+extern edge redirect_edge_succ_nodup (edge, basic_block);
+extern void redirect_edge_pred (edge, basic_block);
+extern basic_block create_basic_block_structure (rtx, rtx, rtx, basic_block);
+extern void clear_bb_flags (void);
+extern int post_order_compute (int *, bool, bool);
+extern int inverted_post_order_compute (int *);
+extern int pre_and_rev_post_order_compute (int *, int *, bool);
+extern int dfs_enumerate_from (basic_block, int,
+ bool (*)(const_basic_block, const void *),
+ basic_block *, int, const void *);
+extern void compute_dominance_frontiers (bitmap *);
+extern bitmap compute_idf (bitmap, bitmap *);
+extern void dump_bb_info (basic_block, bool, bool, int, const char *, FILE *);
+extern void dump_edge_info (FILE *, edge, int);
+extern void brief_dump_cfg (FILE *);
+extern void clear_edges (void);
+extern void scale_bbs_frequencies_int (basic_block *, int, int, int);
+extern void scale_bbs_frequencies_gcov_type (basic_block *, int, gcov_type,
+ gcov_type);
+
+/* Structure to group all of the information to process IF-THEN and
+ IF-THEN-ELSE blocks for the conditional execution support. This
+ needs to be in a public file in case the IFCVT macros call
+ functions passing the ce_if_block data structure. */
+
+typedef struct ce_if_block
+{
+ basic_block test_bb; /* First test block. */
+ basic_block then_bb; /* THEN block. */
+ basic_block else_bb; /* ELSE block or NULL. */
+ basic_block join_bb; /* Join THEN/ELSE blocks. */
+ basic_block last_test_bb; /* Last bb to hold && or || tests. */
+ int num_multiple_test_blocks; /* # of && and || basic blocks. */
+ int num_and_and_blocks; /* # of && blocks. */
+ int num_or_or_blocks; /* # of || blocks. */
+ int num_multiple_test_insns; /* # of insns in && and || blocks. */
+ int and_and_p; /* Complex test is &&. */
+ int num_then_insns; /* # of insns in THEN block. */
+ int num_else_insns; /* # of insns in ELSE block. */
+ int pass; /* Pass number. */
+
+#ifdef IFCVT_EXTRA_FIELDS
+ IFCVT_EXTRA_FIELDS /* Any machine dependent fields. */
+#endif
+
+} ce_if_block_t;
/* This structure maintains an edge list vector. */
struct edge_list
edge *index_to_edge;
};
+/* The base value for branch probability notes and edge probabilities. */
+#define REG_BR_PROB_BASE 10000
+
/* This is the value which indicates no edge is present. */
#define EDGE_INDEX_NO_EDGE -1
#define NUM_EDGES(el) ((el)->num_edges)
/* BB is assumed to contain conditional jump. Return the fallthru edge. */
-#define FALLTHRU_EDGE(bb) ((bb)->succ->flags & EDGE_FALLTHRU \
- ? (bb)->succ : (bb)->succ->succ_next)
+#define FALLTHRU_EDGE(bb) (EDGE_SUCC ((bb), 0)->flags & EDGE_FALLTHRU \
+ ? EDGE_SUCC ((bb), 0) : EDGE_SUCC ((bb), 1))
/* BB is assumed to contain conditional jump. Return the branch edge. */
-#define BRANCH_EDGE(bb) ((bb)->succ->flags & EDGE_FALLTHRU \
- ? (bb)->succ->succ_next : (bb)->succ)
+#define BRANCH_EDGE(bb) (EDGE_SUCC ((bb), 0)->flags & EDGE_FALLTHRU \
+ ? EDGE_SUCC ((bb), 1) : EDGE_SUCC ((bb), 0))
/* Return expected execution frequency of the edge E. */
#define EDGE_FREQUENCY(e) (((e)->src->frequency \
/ REG_BR_PROB_BASE)
/* Return nonzero if edge is critical. */
-#define EDGE_CRITICAL_P(e) ((e)->src->succ->succ_next \
- && (e)->dest->pred->pred_next)
+#define EDGE_CRITICAL_P(e) (EDGE_COUNT ((e)->src->succs) >= 2 \
+ && EDGE_COUNT ((e)->dest->preds) >= 2)
-struct edge_list * create_edge_list PARAMS ((void));
-void free_edge_list PARAMS ((struct edge_list *));
-void print_edge_list PARAMS ((FILE *, struct edge_list *));
-void verify_edge_list PARAMS ((FILE *, struct edge_list *));
-int find_edge_index PARAMS ((struct edge_list *,
- basic_block, basic_block));
+#define EDGE_COUNT(ev) VEC_length (edge, (ev))
+#define EDGE_I(ev,i) VEC_index (edge, (ev), (i))
+#define EDGE_PRED(bb,i) VEC_index (edge, (bb)->preds, (i))
+#define EDGE_SUCC(bb,i) VEC_index (edge, (bb)->succs, (i))
+/* Returns true if BB has precisely one successor. */
-enum update_life_extent
+static inline bool
+single_succ_p (const_basic_block bb)
{
- UPDATE_LIFE_LOCAL = 0,
- UPDATE_LIFE_GLOBAL = 1,
- UPDATE_LIFE_GLOBAL_RM_NOTES = 2
-};
+ return EDGE_COUNT (bb->succs) == 1;
+}
+
+/* Returns true if BB has precisely one predecessor. */
-/* Flags for life_analysis and update_life_info. */
+static inline bool
+single_pred_p (const_basic_block bb)
+{
+ return EDGE_COUNT (bb->preds) == 1;
+}
+
+/* Returns the single successor edge of basic block BB. Aborts if
+ BB does not have exactly one successor. */
+
+static inline edge
+single_succ_edge (const_basic_block bb)
+{
+ gcc_assert (single_succ_p (bb));
+ return EDGE_SUCC (bb, 0);
+}
-#define PROP_DEATH_NOTES 1 /* Create DEAD and UNUSED notes. */
-#define PROP_LOG_LINKS 2 /* Create LOG_LINKS. */
-#define PROP_REG_INFO 4 /* Update regs_ever_live et al. */
-#define PROP_KILL_DEAD_CODE 8 /* Remove dead code. */
-#define PROP_SCAN_DEAD_CODE 16 /* Scan for dead code. */
-#define PROP_ALLOW_CFG_CHANGES 32 /* Allow the CFG to be changed
- by dead code removal. */
-#define PROP_AUTOINC 64 /* Create autoinc mem references. */
-#define PROP_EQUAL_NOTES 128 /* Take into account REG_EQUAL notes. */
-#define PROP_FINAL 127 /* All of the above. */
+/* Returns the single predecessor edge of basic block BB. Aborts
+ if BB does not have exactly one predecessor. */
-#define CLEANUP_EXPENSIVE 1 /* Do relativly expensive optimizations
+static inline edge
+single_pred_edge (const_basic_block bb)
+{
+ gcc_assert (single_pred_p (bb));
+ return EDGE_PRED (bb, 0);
+}
+
+/* Returns the single successor block of basic block BB. Aborts
+ if BB does not have exactly one successor. */
+
+static inline basic_block
+single_succ (const_basic_block bb)
+{
+ return single_succ_edge (bb)->dest;
+}
+
+/* Returns the single predecessor block of basic block BB. Aborts
+ if BB does not have exactly one predecessor.*/
+
+static inline basic_block
+single_pred (const_basic_block bb)
+{
+ return single_pred_edge (bb)->src;
+}
+
+/* Iterator object for edges. */
+
+typedef struct {
+ unsigned index;
+ VEC(edge,gc) **container;
+} edge_iterator;
+
+static inline VEC(edge,gc) *
+ei_container (edge_iterator i)
+{
+ gcc_assert (i.container);
+ return *i.container;
+}
+
+#define ei_start(iter) ei_start_1 (&(iter))
+#define ei_last(iter) ei_last_1 (&(iter))
+
+/* Return an iterator pointing to the start of an edge vector. */
+static inline edge_iterator
+ei_start_1 (VEC(edge,gc) **ev)
+{
+ edge_iterator i;
+
+ i.index = 0;
+ i.container = ev;
+
+ return i;
+}
+
+/* Return an iterator pointing to the last element of an edge
+ vector. */
+static inline edge_iterator
+ei_last_1 (VEC(edge,gc) **ev)
+{
+ edge_iterator i;
+
+ i.index = EDGE_COUNT (*ev) - 1;
+ i.container = ev;
+
+ return i;
+}
+
+/* Is the iterator `i' at the end of the sequence? */
+static inline bool
+ei_end_p (edge_iterator i)
+{
+ return (i.index == EDGE_COUNT (ei_container (i)));
+}
+
+/* Is the iterator `i' at one position before the end of the
+ sequence? */
+static inline bool
+ei_one_before_end_p (edge_iterator i)
+{
+ return (i.index + 1 == EDGE_COUNT (ei_container (i)));
+}
+
+/* Advance the iterator to the next element. */
+static inline void
+ei_next (edge_iterator *i)
+{
+ gcc_assert (i->index < EDGE_COUNT (ei_container (*i)));
+ i->index++;
+}
+
+/* Move the iterator to the previous element. */
+static inline void
+ei_prev (edge_iterator *i)
+{
+ gcc_assert (i->index > 0);
+ i->index--;
+}
+
+/* Return the edge pointed to by the iterator `i'. */
+static inline edge
+ei_edge (edge_iterator i)
+{
+ return EDGE_I (ei_container (i), i.index);
+}
+
+/* Return an edge pointed to by the iterator. Do it safely so that
+ NULL is returned when the iterator is pointing at the end of the
+ sequence. */
+static inline edge
+ei_safe_edge (edge_iterator i)
+{
+ return !ei_end_p (i) ? ei_edge (i) : NULL;
+}
+
+/* Return 1 if we should continue to iterate. Return 0 otherwise.
+ *Edge P is set to the next edge if we are to continue to iterate
+ and NULL otherwise. */
+
+static inline bool
+ei_cond (edge_iterator ei, edge *p)
+{
+ if (!ei_end_p (ei))
+ {
+ *p = ei_edge (ei);
+ return 1;
+ }
+ else
+ {
+ *p = NULL;
+ return 0;
+ }
+}
+
+/* This macro serves as a convenient way to iterate each edge in a
+ vector of predecessor or successor edges. It must not be used when
+ an element might be removed during the traversal, otherwise
+ elements will be missed. Instead, use a for-loop like that shown
+ in the following pseudo-code:
+
+ FOR (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
+ {
+ IF (e != taken_edge)
+ remove_edge (e);
+ ELSE
+ ei_next (&ei);
+ }
+*/
+
+#define FOR_EACH_EDGE(EDGE,ITER,EDGE_VEC) \
+ for ((ITER) = ei_start ((EDGE_VEC)); \
+ ei_cond ((ITER), &(EDGE)); \
+ ei_next (&(ITER)))
+
+struct edge_list * create_edge_list (void);
+void free_edge_list (struct edge_list *);
+void print_edge_list (FILE *, struct edge_list *);
+void verify_edge_list (FILE *, struct edge_list *);
+int find_edge_index (struct edge_list *, basic_block, basic_block);
+edge find_edge (basic_block, basic_block);
+
+#define CLEANUP_EXPENSIVE 1 /* Do relatively expensive optimizations
except for edge forwarding */
#define CLEANUP_CROSSJUMP 2 /* Do crossjumping. */
#define CLEANUP_POST_REGSTACK 4 /* We run after reg-stack and need
to care REG_DEAD notes. */
-#define CLEANUP_PRE_SIBCALL 8 /* Do not get confused by code hidden
- inside call_placeholders.. */
-#define CLEANUP_PRE_LOOP 16 /* Take care to preserve syntactic loop
- notes. */
-#define CLEANUP_UPDATE_LIFE 32 /* Keep life information up to date. */
-#define CLEANUP_THREADING 64 /* Do jump threading. */
-/* Flags for loop discovery. */
-
-#define LOOP_TREE 1 /* Build loop hierarchy tree. */
-#define LOOP_PRE_HEADER 2 /* Analyse loop pre-header. */
-#define LOOP_ENTRY_EDGES 4 /* Find entry edges. */
-#define LOOP_EXIT_EDGES 8 /* Find exit edges. */
-#define LOOP_EDGES (LOOP_ENTRY_EDGES | LOOP_EXIT_EDGES)
-#define LOOP_EXITS_DOMS 16 /* Find nodes that dom. all exits. */
-#define LOOP_ALL 31 /* All of the above */
-
-extern void life_analysis PARAMS ((rtx, FILE *, int));
-extern void update_life_info PARAMS ((sbitmap, enum update_life_extent,
- int));
-extern int count_or_remove_death_notes PARAMS ((sbitmap, int));
-extern int propagate_block PARAMS ((basic_block, regset, regset, regset,
- int));
-
-struct propagate_block_info;
-extern rtx propagate_one_insn PARAMS ((struct propagate_block_info *, rtx));
-extern struct propagate_block_info *init_propagate_block_info
- PARAMS ((basic_block, regset, regset, regset, int));
-extern void free_propagate_block_info PARAMS ((struct propagate_block_info *));
+#define CLEANUP_THREADING 8 /* Do jump threading. */
+#define CLEANUP_NO_INSN_DEL 16 /* Do not try to delete trivially dead
+ insns. */
+#define CLEANUP_CFGLAYOUT 32 /* Do cleanup in cfglayout mode. */
/* In lcm.c */
-extern struct edge_list *pre_edge_lcm PARAMS ((FILE *, int, sbitmap *,
- sbitmap *, sbitmap *,
- sbitmap *, sbitmap **,
- sbitmap **));
-extern struct edge_list *pre_edge_rev_lcm PARAMS ((FILE *, int, sbitmap *,
- sbitmap *, sbitmap *,
- sbitmap *, sbitmap **,
- sbitmap **));
-extern void compute_available PARAMS ((sbitmap *, sbitmap *,
- sbitmap *, sbitmap *));
-extern int optimize_mode_switching PARAMS ((FILE *));
-
-/* In emit-rtl.c. */
-extern rtx emit_block_insn_after PARAMS ((rtx, rtx, basic_block));
-extern rtx emit_block_insn_before PARAMS ((rtx, rtx, basic_block));
+extern struct edge_list *pre_edge_lcm (int, sbitmap *, sbitmap *,
+ sbitmap *, sbitmap *, sbitmap **,
+ sbitmap **);
+extern struct edge_list *pre_edge_rev_lcm (int, sbitmap *,
+ sbitmap *, sbitmap *,
+ sbitmap *, sbitmap **,
+ sbitmap **);
+extern void compute_available (sbitmap *, sbitmap *, sbitmap *, sbitmap *);
/* In predict.c */
-extern void estimate_probability PARAMS ((struct loops *));
-extern void expected_value_to_br_prob PARAMS ((void));
-
-/* In flow.c */
-extern void init_flow PARAMS ((void));
-extern void reorder_basic_blocks PARAMS ((void));
-extern void dump_bb PARAMS ((basic_block, FILE *));
-extern void debug_bb PARAMS ((basic_block));
-extern void debug_bb_n PARAMS ((int));
-extern void dump_regset PARAMS ((regset, FILE *));
-extern void debug_regset PARAMS ((regset));
-extern void allocate_reg_life_data PARAMS ((void));
-extern void allocate_bb_life_data PARAMS ((void));
-extern void expunge_block PARAMS ((basic_block));
-extern void expunge_block_nocompact PARAMS ((basic_block));
-extern basic_block alloc_block PARAMS ((void));
-extern void find_unreachable_blocks PARAMS ((void));
-extern void delete_noop_moves PARAMS ((rtx));
-extern basic_block redirect_edge_and_branch_force PARAMS ((edge, basic_block));
-extern basic_block force_nonfallthru PARAMS ((edge));
-extern bool redirect_edge_and_branch PARAMS ((edge, basic_block));
-extern rtx block_label PARAMS ((basic_block));
-extern bool forwarder_block_p PARAMS ((basic_block));
-extern bool purge_all_dead_edges PARAMS ((int));
-extern bool purge_dead_edges PARAMS ((basic_block));
-extern void find_sub_basic_blocks PARAMS ((basic_block));
-extern void find_many_sub_basic_blocks PARAMS ((sbitmap));
-extern bool can_fallthru PARAMS ((basic_block, basic_block));
-extern void flow_nodes_print PARAMS ((const char *, const sbitmap,
- FILE *));
-extern void flow_edge_list_print PARAMS ((const char *, const edge *,
- int, FILE *));
-extern void alloc_aux_for_block PARAMS ((basic_block, int));
-extern void alloc_aux_for_blocks PARAMS ((int));
-extern void clear_aux_for_blocks PARAMS ((void));
-extern void free_aux_for_blocks PARAMS ((void));
-extern void alloc_aux_for_edge PARAMS ((edge, int));
-extern void alloc_aux_for_edges PARAMS ((int));
-extern void clear_aux_for_edges PARAMS ((void));
-extern void free_aux_for_edges PARAMS ((void));
-
-/* This function is always defined so it can be called from the
- debugger, and it is declared extern so we don't get warnings about
- it being unused. */
-extern void verify_flow_info PARAMS ((void));
-extern int flow_loop_outside_edge_p PARAMS ((const struct loop *, edge));
-
-typedef struct conflict_graph_def *conflict_graph;
-
-/* Callback function when enumerating conflicts. The arguments are
- the smaller and larger regno in the conflict. Returns zero if
- enumeration is to continue, non-zero to halt enumeration. */
-typedef int (*conflict_graph_enum_fn) PARAMS ((int, int, void *));
-
-
-/* Prototypes of operations on conflict graphs. */
-
-extern conflict_graph conflict_graph_new
- PARAMS ((int));
-extern void conflict_graph_delete PARAMS ((conflict_graph));
-extern int conflict_graph_add PARAMS ((conflict_graph,
- int, int));
-extern int conflict_graph_conflict_p PARAMS ((conflict_graph,
- int, int));
-extern void conflict_graph_enum PARAMS ((conflict_graph, int,
- conflict_graph_enum_fn,
- void *));
-extern void conflict_graph_merge_regs PARAMS ((conflict_graph, int,
- int));
-extern void conflict_graph_print PARAMS ((conflict_graph, FILE*));
-extern conflict_graph conflict_graph_compute
- PARAMS ((regset,
- partition));
-extern bool mark_dfs_back_edges PARAMS ((void));
-extern void update_br_prob_note PARAMS ((basic_block));
-extern void fixup_abnormal_edges PARAMS ((void));
-extern bool control_flow_insn_p PARAMS ((rtx));
+extern bool maybe_hot_bb_p (const_basic_block);
+extern bool maybe_hot_edge_p (edge);
+extern bool probably_never_executed_bb_p (const_basic_block);
+extern bool optimize_bb_for_size_p (const_basic_block);
+extern bool optimize_bb_for_speed_p (const_basic_block);
+extern bool optimize_edge_for_size_p (edge);
+extern bool optimize_edge_for_speed_p (edge);
+extern bool optimize_function_for_size_p (struct function *);
+extern bool optimize_function_for_speed_p (struct function *);
+extern bool optimize_loop_for_size_p (struct loop *);
+extern bool optimize_loop_for_speed_p (struct loop *);
+extern bool optimize_loop_nest_for_size_p (struct loop *);
+extern bool optimize_loop_nest_for_speed_p (struct loop *);
+extern bool gimple_predicted_by_p (const_basic_block, enum br_predictor);
+extern bool rtl_predicted_by_p (const_basic_block, enum br_predictor);
+extern void gimple_predict_edge (edge, enum br_predictor, int);
+extern void rtl_predict_edge (edge, enum br_predictor, int);
+extern void predict_edge_def (edge, enum br_predictor, enum prediction);
+extern void guess_outgoing_edge_probabilities (basic_block);
+extern void remove_predictions_associated_with_edge (edge);
+extern bool edge_probability_reliable_p (const_edge);
+extern bool br_prob_note_reliable_p (const_rtx);
+extern bool predictable_edge_p (edge);
+
+/* In cfg.c */
+extern void dump_regset (regset, FILE *);
+extern void debug_regset (regset);
+extern void init_flow (struct function *);
+extern void debug_bb (basic_block);
+extern basic_block debug_bb_n (int);
+extern void dump_regset (regset, FILE *);
+extern void debug_regset (regset);
+extern void expunge_block (basic_block);
+extern void link_block (basic_block, basic_block);
+extern void unlink_block (basic_block);
+extern void compact_blocks (void);
+extern basic_block alloc_block (void);
+extern void alloc_aux_for_block (basic_block, int);
+extern void alloc_aux_for_blocks (int);
+extern void clear_aux_for_blocks (void);
+extern void free_aux_for_blocks (void);
+extern void alloc_aux_for_edge (edge, int);
+extern void alloc_aux_for_edges (int);
+extern void clear_aux_for_edges (void);
+extern void free_aux_for_edges (void);
+
+/* In cfganal.c */
+extern void find_unreachable_blocks (void);
+extern bool forwarder_block_p (const_basic_block);
+extern bool can_fallthru (basic_block, basic_block);
+extern bool could_fall_through (basic_block, basic_block);
+extern void flow_nodes_print (const char *, const_sbitmap, FILE *);
+extern void flow_edge_list_print (const char *, const edge *, int, FILE *);
+
+/* In cfgrtl.c */
+extern basic_block force_nonfallthru (edge);
+extern rtx block_label (basic_block);
+extern bool purge_all_dead_edges (void);
+extern bool purge_dead_edges (basic_block);
+
+/* In cfgbuild.c. */
+extern void find_many_sub_basic_blocks (sbitmap);
+extern void rtl_make_eh_edge (sbitmap, basic_block, rtx);
+extern void find_basic_blocks (rtx);
+
+/* In cfgcleanup.c. */
+extern bool cleanup_cfg (int);
+extern bool delete_unreachable_blocks (void);
+
+extern bool mark_dfs_back_edges (void);
+extern void set_edge_can_fallthru_flag (void);
+extern void update_br_prob_note (basic_block);
+extern void fixup_abnormal_edges (void);
+extern bool inside_basic_block_p (const_rtx);
+extern bool control_flow_insn_p (const_rtx);
+extern rtx get_last_bb_insn (basic_block);
+
+/* In bb-reorder.c */
+extern void reorder_basic_blocks (void);
/* In dominance.c */
enum cdi_direction
{
- CDI_DOMINATORS,
- CDI_POST_DOMINATORS
+ CDI_DOMINATORS = 1,
+ CDI_POST_DOMINATORS = 2
};
-extern void calculate_dominance_info PARAMS ((int *, sbitmap *,
- enum cdi_direction));
+extern enum dom_state dom_info_state (enum cdi_direction);
+extern void set_dom_info_availability (enum cdi_direction, enum dom_state);
+extern bool dom_info_available_p (enum cdi_direction);
+extern void calculate_dominance_info (enum cdi_direction);
+extern void free_dominance_info (enum cdi_direction);
+extern basic_block nearest_common_dominator (enum cdi_direction,
+ basic_block, basic_block);
+extern basic_block nearest_common_dominator_for_set (enum cdi_direction,
+ bitmap);
+extern void set_immediate_dominator (enum cdi_direction, basic_block,
+ basic_block);
+extern basic_block get_immediate_dominator (enum cdi_direction, basic_block);
+extern bool dominated_by_p (enum cdi_direction, const_basic_block, const_basic_block);
+extern VEC (basic_block, heap) *get_dominated_by (enum cdi_direction, basic_block);
+extern VEC (basic_block, heap) *get_dominated_by_region (enum cdi_direction,
+ basic_block *,
+ unsigned);
+extern void add_to_dominance_info (enum cdi_direction, basic_block);
+extern void delete_from_dominance_info (enum cdi_direction, basic_block);
+basic_block recompute_dominator (enum cdi_direction, basic_block);
+extern void redirect_immediate_dominators (enum cdi_direction, basic_block,
+ basic_block);
+extern void iterate_fix_dominators (enum cdi_direction,
+ VEC (basic_block, heap) *, bool);
+extern void verify_dominators (enum cdi_direction);
+extern basic_block first_dom_son (enum cdi_direction, basic_block);
+extern basic_block next_dom_son (enum cdi_direction, basic_block);
+unsigned bb_dom_dfs_in (enum cdi_direction, basic_block);
+unsigned bb_dom_dfs_out (enum cdi_direction, basic_block);
+
+extern edge try_redirect_by_replacing_jump (edge, basic_block, bool);
+extern void break_superblocks (void);
+extern void relink_block_chain (bool);
+extern void check_bb_profile (basic_block, FILE *);
+extern void update_bb_profile_for_threading (basic_block, int, gcov_type, edge);
+extern void init_rtl_bb_info (basic_block);
+
+extern void initialize_original_copy_tables (void);
+extern void free_original_copy_tables (void);
+extern void set_bb_original (basic_block, basic_block);
+extern basic_block get_bb_original (basic_block);
+extern void set_bb_copy (basic_block, basic_block);
+extern basic_block get_bb_copy (basic_block);
+void set_loop_copy (struct loop *, struct loop *);
+struct loop *get_loop_copy (struct loop *);
+
+
+extern rtx insert_insn_end_bb_new (rtx, basic_block);
+
+#include "cfghooks.h"
+
+/* Return true when one of the predecessor edges of BB is marked with EDGE_EH. */
+static inline bool
+bb_has_eh_pred (basic_block bb)
+{
+ edge e;
+ edge_iterator ei;
+
+ FOR_EACH_EDGE (e, ei, bb->preds)
+ {
+ if (e->flags & EDGE_EH)
+ return true;
+ }
+ return false;
+}
+
+/* Return true when one of the predecessor edges of BB is marked with EDGE_ABNORMAL. */
+static inline bool
+bb_has_abnormal_pred (basic_block bb)
+{
+ edge e;
+ edge_iterator ei;
+
+ FOR_EACH_EDGE (e, ei, bb->preds)
+ {
+ if (e->flags & EDGE_ABNORMAL)
+ return true;
+ }
+ return false;
+}
+
+/* In cfgloopmanip.c. */
+extern edge mfb_kj_edge;
+extern bool mfb_keep_just (edge);
+
+/* In cfgexpand.c. */
+extern void rtl_profile_for_bb (basic_block);
+extern void rtl_profile_for_edge (edge);
+extern void default_rtl_profile (void);
#endif /* GCC_BASIC_BLOCK_H */
projects / msp430-gcc.git / blobdiff