2014-10-21 17:17:12 +02:00
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/* Control flow graph manipulation code header file.
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2015-01-05 13:33:28 +01:00
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Copyright (C) 2014-2015 Free Software Foundation, Inc.
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2014-10-21 17:17:12 +02:00
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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 it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_CFG_H
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#define GCC_CFG_H
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2014-10-27 13:41:01 +01:00
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/* What sort of profiling information we have. */
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enum profile_status_d
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{
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PROFILE_ABSENT,
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PROFILE_GUESSED,
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PROFILE_READ,
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PROFILE_LAST /* Last value, used by profile streaming. */
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};
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/* A structure to group all the per-function control flow graph data.
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The x_* prefixing is necessary because otherwise references to the
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fields of this struct are interpreted as the defines for backward
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source compatibility following the definition of this struct. */
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struct GTY(()) control_flow_graph {
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/* Block pointers for the exit and entry of a function.
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These are always the head and tail of the basic block list. */
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basic_block x_entry_block_ptr;
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basic_block x_exit_block_ptr;
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/* Index by basic block number, get basic block struct info. */
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vec<basic_block, va_gc> *x_basic_block_info;
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/* Number of basic blocks in this flow graph. */
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int x_n_basic_blocks;
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/* Number of edges in this flow graph. */
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int x_n_edges;
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/* The first free basic block number. */
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int x_last_basic_block;
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/* UIDs for LABEL_DECLs. */
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int last_label_uid;
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/* Mapping of labels to their associated blocks. At present
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only used for the gimple CFG. */
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vec<basic_block, va_gc> *x_label_to_block_map;
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enum profile_status_d x_profile_status;
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/* Whether the dominators and the postdominators are available. */
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enum dom_state x_dom_computed[2];
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/* Number of basic blocks in the dominance tree. */
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unsigned x_n_bbs_in_dom_tree[2];
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/* Maximal number of entities in the single jumptable. Used to estimate
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final flowgraph size. */
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int max_jumptable_ents;
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};
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2014-10-21 17:17:12 +02:00
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extern void init_flow (struct function *);
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extern void clear_edges (void);
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extern basic_block alloc_block (void);
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extern void link_block (basic_block, basic_block);
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extern void unlink_block (basic_block);
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extern void compact_blocks (void);
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extern void expunge_block (basic_block);
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extern edge unchecked_make_edge (basic_block, basic_block, int);
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extern edge cached_make_edge (sbitmap, basic_block, basic_block, int);
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extern edge make_edge (basic_block, basic_block, int);
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extern edge make_single_succ_edge (basic_block, basic_block, int);
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extern void remove_edge_raw (edge);
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extern void redirect_edge_succ (edge, basic_block);
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extern void redirect_edge_pred (edge, basic_block);
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extern void clear_bb_flags (void);
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extern void dump_edge_info (FILE *, edge, int, int);
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extern void debug (edge_def &ref);
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extern void debug (edge_def *ptr);
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extern void alloc_aux_for_blocks (int);
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extern void clear_aux_for_blocks (void);
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extern void free_aux_for_blocks (void);
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extern void alloc_aux_for_edge (edge, int);
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extern void alloc_aux_for_edges (int);
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extern void clear_aux_for_edges (void);
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extern void free_aux_for_edges (void);
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extern void debug_bb (basic_block);
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extern basic_block debug_bb_n (int);
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extern void dump_bb_info (FILE *, basic_block, int, int, bool, bool);
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extern void brief_dump_cfg (FILE *, int);
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extern void update_bb_profile_for_threading (basic_block, int, gcov_type, edge);
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extern void scale_bbs_frequencies_int (basic_block *, int, int, int);
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extern void scale_bbs_frequencies_gcov_type (basic_block *, int, gcov_type,
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gcov_type);
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extern void initialize_original_copy_tables (void);
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extern void free_original_copy_tables (void);
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extern void set_bb_original (basic_block, basic_block);
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extern basic_block get_bb_original (basic_block);
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extern void set_bb_copy (basic_block, basic_block);
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extern basic_block get_bb_copy (basic_block);
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void set_loop_copy (struct loop *, struct loop *);
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struct loop *get_loop_copy (struct loop *);
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#endif /* GCC_CFG_H */
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