193 lines
7.5 KiB
C
193 lines
7.5 KiB
C
/* Hooks for cfg representation specific functions.
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Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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Contributed by Sebastian Pop <s.pop@laposte.net>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef GCC_CFGHOOKS_H
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#define GCC_CFGHOOKS_H
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struct cfg_hooks
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{
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/* Name of the corresponding ir. */
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const char *name;
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/* Debugging. */
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int (*verify_flow_info) (void);
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void (*dump_bb) (basic_block, FILE *, int);
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/* Basic CFG manipulation. */
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/* Return new basic block. */
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basic_block (*create_basic_block) (void *head, void *end, basic_block after);
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/* Redirect edge E to the given basic block B and update underlying program
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representation. Returns edge representing redirected branch (that may not
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be equivalent to E in the case of duplicate edges being removed) or NULL
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if edge is not easily redirectable for whatever reason. */
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edge (*redirect_edge_and_branch) (edge e, basic_block b);
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/* Same as the above but allows redirecting of fallthru edges. In that case
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newly created forwarder basic block is returned. The edge must
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not be abnormal. */
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basic_block (*redirect_edge_and_branch_force) (edge, basic_block);
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/* Remove statements corresponding to a given basic block. */
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void (*delete_basic_block) (basic_block);
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/* Creates a new basic block just after basic block B by splitting
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everything after specified instruction I. */
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basic_block (*split_block) (basic_block b, void * i);
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/* Move block B immediately after block A. */
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bool (*move_block_after) (basic_block b, basic_block a);
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/* Return true when blocks A and B can be merged into single basic block. */
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bool (*can_merge_blocks_p) (basic_block a, basic_block b);
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/* Merge blocks A and B. */
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void (*merge_blocks) (basic_block a, basic_block b);
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/* Predict edge E using PREDICTOR to given PROBABILITY. */
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void (*predict_edge) (edge e, enum br_predictor predictor, int probability);
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/* Return true if the one of outgoing edges is already predicted by
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PREDICTOR. */
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bool (*predicted_by_p) (basic_block bb, enum br_predictor predictor);
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/* Return true when block A can be duplicated. */
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bool (*can_duplicate_block_p) (basic_block a);
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/* Duplicate block A. */
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basic_block (*duplicate_block) (basic_block a);
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/* Higher level functions representable by primitive operations above if
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we didn't have some oddities in RTL and Tree representations. */
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basic_block (*split_edge) (edge);
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void (*make_forwarder_block) (edge);
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/* Tries to make the edge fallthru. */
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void (*tidy_fallthru_edge) (edge);
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/* Say whether a block ends with a call, possibly followed by some
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other code that must stay with the call. */
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bool (*block_ends_with_call_p) (basic_block);
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/* Say whether a block ends with a conditional branch. Switches
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and unconditional branches do not qualify. */
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bool (*block_ends_with_condjump_p) (basic_block);
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/* Add fake edges to the function exit for any non constant and non noreturn
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calls, volatile inline assembly in the bitmap of blocks specified by
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BLOCKS or to the whole CFG if BLOCKS is zero. Return the number of blocks
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that were split.
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The goal is to expose cases in which entering a basic block does not imply
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that all subsequent instructions must be executed. */
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int (*flow_call_edges_add) (sbitmap);
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/* This function is called immediately after edge E is added to the
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edge vector E->dest->preds. */
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void (*execute_on_growing_pred) (edge);
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/* This function is called immediately before edge E is removed from
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the edge vector E->dest->preds. */
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void (*execute_on_shrinking_pred) (edge);
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/* A hook for duplicating loop in CFG, currently this is used
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in loop versioning. */
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bool (*cfg_hook_duplicate_loop_to_header_edge) (struct loop *loop, edge e,
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struct loops *loops,
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unsigned int ndupl,
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sbitmap wont_exit,
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edge orig, edge *to_remove,
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unsigned int *n_to_remove,
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int flags);
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/* Add condition to new basic block and update CFG used in loop
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versioning. */
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void (*lv_add_condition_to_bb) (basic_block, basic_block, basic_block,
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void *);
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/* Update the PHI nodes in case of loop versioning. */
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void (*lv_adjust_loop_header_phi) (basic_block, basic_block,
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basic_block, edge);
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/* Given a condition BB extract the true/false taken/not taken edges
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(depending if we are on tree's or RTL). */
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void (*extract_cond_bb_edges) (basic_block, edge *, edge *);
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/* Add PHI arguments queued in PENDINT_STMT list on edge E to edge
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E->dest (only in tree-ssa loop versioning. */
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void (*flush_pending_stmts) (edge);
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};
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extern void verify_flow_info (void);
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extern void dump_bb (basic_block, FILE *, int);
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extern edge redirect_edge_and_branch (edge, basic_block);
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extern basic_block redirect_edge_and_branch_force (edge, basic_block);
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extern edge split_block (basic_block, void *);
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extern edge split_block_after_labels (basic_block);
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extern bool move_block_after (basic_block, basic_block);
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extern void delete_basic_block (basic_block);
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extern basic_block split_edge (edge);
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extern basic_block create_basic_block (void *, void *, basic_block);
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extern basic_block create_empty_bb (basic_block);
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extern bool can_merge_blocks_p (basic_block, basic_block);
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extern void merge_blocks (basic_block, basic_block);
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extern edge make_forwarder_block (basic_block, bool (*)(edge),
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void (*) (basic_block));
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extern void tidy_fallthru_edge (edge);
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extern void tidy_fallthru_edges (void);
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extern void predict_edge (edge e, enum br_predictor predictor, int probability);
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extern bool predicted_by_p (basic_block bb, enum br_predictor predictor);
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extern bool can_duplicate_block_p (basic_block);
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extern basic_block duplicate_block (basic_block, edge, basic_block);
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extern bool block_ends_with_call_p (basic_block bb);
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extern bool block_ends_with_condjump_p (basic_block bb);
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extern int flow_call_edges_add (sbitmap);
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extern void execute_on_growing_pred (edge);
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extern void execute_on_shrinking_pred (edge);
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extern bool cfg_hook_duplicate_loop_to_header_edge (struct loop *loop, edge,
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struct loops *loops,
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unsigned int ndupl,
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sbitmap wont_exit,
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edge orig, edge *to_remove,
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unsigned int *n_to_remove,
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int flags);
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extern void lv_flush_pending_stmts (edge);
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extern void extract_cond_bb_edges (basic_block, edge *, edge*);
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extern void lv_adjust_loop_header_phi (basic_block, basic_block, basic_block,
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edge);
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extern void lv_add_condition_to_bb (basic_block, basic_block, basic_block,
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void *);
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/* Hooks containers. */
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extern struct cfg_hooks tree_cfg_hooks;
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extern struct cfg_hooks rtl_cfg_hooks;
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extern struct cfg_hooks cfg_layout_rtl_cfg_hooks;
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/* Declarations. */
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extern int ir_type (void);
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extern void rtl_register_cfg_hooks (void);
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extern void cfg_layout_rtl_register_cfg_hooks (void);
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extern void tree_register_cfg_hooks (void);
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#endif /* GCC_CFGHOOKS_H */
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