1/* Control flow graph analysis header file.
2 Copyright (C) 2014-2023 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20
21#ifndef GCC_CFGANAL_H
22#define GCC_CFGANAL_H
23
24/* This structure maintains an edge list vector. */
25/* FIXME: Make this a vec<edge>. */
26struct edge_list
27{
28 int num_edges;
29 edge *index_to_edge;
30};
31
32
33/* Class to compute and manage control dependences on an edge-list. */
34class control_dependences
35{
36public:
37 control_dependences ();
38 ~control_dependences ();
39 bitmap get_edges_dependent_on (int);
40 basic_block get_edge_src (int);
41 basic_block get_edge_dest (int);
42
43private:
44 void set_control_dependence_map_bit (basic_block, int);
45 void clear_control_dependence_bitmap (basic_block);
46 void find_control_dependence (int);
47 vec<bitmap_head> control_dependence_map;
48 vec<std::pair<int, int> > m_el;
49 bitmap_obstack m_bitmaps;
50};
51
52extern bool mark_dfs_back_edges (struct function *);
53extern bool mark_dfs_back_edges (void);
54extern void verify_marked_backedges (struct function *);
55extern void find_unreachable_blocks (void);
56extern void verify_no_unreachable_blocks (void);
57struct edge_list * create_edge_list (void);
58void free_edge_list (struct edge_list *);
59void print_edge_list (FILE *, struct edge_list *);
60void verify_edge_list (FILE *, struct edge_list *);
61edge find_edge (basic_block, basic_block);
62int find_edge_index (struct edge_list *, basic_block, basic_block);
63extern void remove_fake_edges (void);
64extern void remove_fake_exit_edges (void);
65extern void add_noreturn_fake_exit_edges (void);
66extern void connect_infinite_loops_to_exit (void);
67extern int post_order_compute (int *, bool, bool);
68extern basic_block dfs_find_deadend (basic_block);
69extern int inverted_rev_post_order_compute (struct function *,
70 int *, sbitmap *start_points = 0);
71extern int pre_and_rev_post_order_compute_fn (struct function *,
72 int *, int *, bool);
73extern int pre_and_rev_post_order_compute (int *, int *, bool);
74extern int rev_post_order_and_mark_dfs_back_seme (struct function *, edge,
75 bitmap, bool, int *,
76 vec<std::pair<int, int> > *);
77extern int dfs_enumerate_from (basic_block, int,
78 bool (*)(const_basic_block, const void *),
79 basic_block *, int, const void *);
80extern void compute_dominance_frontiers (class bitmap_head *);
81extern bitmap compute_idf (bitmap, class bitmap_head *);
82extern void bitmap_intersection_of_succs (sbitmap, sbitmap *, basic_block);
83extern void bitmap_intersection_of_preds (sbitmap, sbitmap *, basic_block);
84extern void bitmap_union_of_succs (sbitmap, sbitmap *, basic_block);
85extern void bitmap_union_of_preds (sbitmap, sbitmap *, basic_block);
86extern basic_block * single_pred_before_succ_order (void);
87extern edge single_incoming_edge_ignoring_loop_edges (basic_block, bool);
88extern edge single_pred_edge_ignoring_loop_edges (basic_block, bool);
89
90
91#endif /* GCC_CFGANAL_H */
92

source code of gcc/cfganal.h