1 /* Control flow graph manipulation code header file. 2 Copyright (C) 2014-2015 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef GCC_CFG_H 21 #define GCC_CFG_H 22 23 /* What sort of profiling information we have. */ 24 enum profile_status_d 25 { 26 PROFILE_ABSENT, 27 PROFILE_GUESSED, 28 PROFILE_READ, 29 PROFILE_LAST /* Last value, used by profile streaming. */ 30 }; 31 32 /* A structure to group all the per-function control flow graph data. 33 The x_* prefixing is necessary because otherwise references to the 34 fields of this struct are interpreted as the defines for backward 35 source compatibility following the definition of this struct. */ 36 struct GTY(()) control_flow_graph { 37 /* Block pointers for the exit and entry of a function. 38 These are always the head and tail of the basic block list. */ 39 basic_block x_entry_block_ptr; 40 basic_block x_exit_block_ptr; 41 42 /* Index by basic block number, get basic block struct info. */ 43 vec<basic_block, va_gc> *x_basic_block_info; 44 45 /* Number of basic blocks in this flow graph. */ 46 int x_n_basic_blocks; 47 48 /* Number of edges in this flow graph. */ 49 int x_n_edges; 50 51 /* The first free basic block number. */ 52 int x_last_basic_block; 53 54 /* UIDs for LABEL_DECLs. */ 55 int last_label_uid; 56 57 /* Mapping of labels to their associated blocks. At present 58 only used for the gimple CFG. */ 59 vec<basic_block, va_gc> *x_label_to_block_map; 60 61 enum profile_status_d x_profile_status; 62 63 /* Whether the dominators and the postdominators are available. */ 64 enum dom_state x_dom_computed[2]; 65 66 /* Number of basic blocks in the dominance tree. */ 67 unsigned x_n_bbs_in_dom_tree[2]; 68 69 /* Maximal number of entities in the single jumptable. Used to estimate 70 final flowgraph size. */ 71 int max_jumptable_ents; 72 }; 73 74 75 extern void init_flow (struct function *); 76 extern void clear_edges (void); 77 extern basic_block alloc_block (void); 78 extern void link_block (basic_block, basic_block); 79 extern void unlink_block (basic_block); 80 extern void compact_blocks (void); 81 extern void expunge_block (basic_block); 82 extern edge unchecked_make_edge (basic_block, basic_block, int); 83 extern edge cached_make_edge (sbitmap, basic_block, basic_block, int); 84 extern edge make_edge (basic_block, basic_block, int); 85 extern edge make_single_succ_edge (basic_block, basic_block, int); 86 extern void remove_edge_raw (edge); 87 extern void redirect_edge_succ (edge, basic_block); 88 extern void redirect_edge_pred (edge, basic_block); 89 extern void clear_bb_flags (void); 90 extern void dump_edge_info (FILE *, edge, int, int); 91 extern void debug (edge_def &ref); 92 extern void debug (edge_def *ptr); 93 extern void alloc_aux_for_blocks (int); 94 extern void clear_aux_for_blocks (void); 95 extern void free_aux_for_blocks (void); 96 extern void alloc_aux_for_edge (edge, int); 97 extern void alloc_aux_for_edges (int); 98 extern void clear_aux_for_edges (void); 99 extern void free_aux_for_edges (void); 100 extern void debug_bb (basic_block); 101 extern basic_block debug_bb_n (int); 102 extern void dump_bb_info (FILE *, basic_block, int, int, bool, bool); 103 extern void brief_dump_cfg (FILE *, int); 104 extern void update_bb_profile_for_threading (basic_block, int, gcov_type, edge); 105 extern void scale_bbs_frequencies_int (basic_block *, int, int, int); 106 extern void scale_bbs_frequencies_gcov_type (basic_block *, int, gcov_type, 107 gcov_type); 108 extern void initialize_original_copy_tables (void); 109 extern void free_original_copy_tables (void); 110 extern void set_bb_original (basic_block, basic_block); 111 extern basic_block get_bb_original (basic_block); 112 extern void set_bb_copy (basic_block, basic_block); 113 extern basic_block get_bb_copy (basic_block); 114 void set_loop_copy (struct loop *, struct loop *); 115 struct loop *get_loop_copy (struct loop *); 116 117 #endif /* GCC_CFG_H */ 118