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dd637013 | 1 | /* Control flow graph analysis header file. |
7adcbafe | 2 | Copyright (C) 2014-2022 Free Software Foundation, Inc. |
dd637013 AM |
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 | ||
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>. */ | |
26 | struct 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. */ | |
34 | class control_dependences | |
35 | { | |
36 | public: | |
30fd2977 | 37 | control_dependences (); |
dd637013 AM |
38 | ~control_dependences (); |
39 | bitmap get_edges_dependent_on (int); | |
30fd2977 RB |
40 | basic_block get_edge_src (int); |
41 | basic_block get_edge_dest (int); | |
dd637013 AM |
42 | |
43 | private: | |
44 | void set_control_dependence_map_bit (basic_block, int); | |
45 | void clear_control_dependence_bitmap (basic_block); | |
46 | void find_control_dependence (int); | |
a11afa7a | 47 | vec<bitmap_head> control_dependence_map; |
30fd2977 | 48 | vec<std::pair<int, int> > m_el; |
a11afa7a | 49 | bitmap_obstack m_bitmaps; |
dd637013 AM |
50 | }; |
51 | ||
b500d259 | 52 | extern bool mark_dfs_back_edges (struct function *); |
dd637013 | 53 | extern bool mark_dfs_back_edges (void); |
83ad3a96 | 54 | extern void verify_marked_backedges (struct function *); |
dd637013 | 55 | extern void find_unreachable_blocks (void); |
a352b710 | 56 | extern void verify_no_unreachable_blocks (void); |
dd637013 AM |
57 | struct edge_list * create_edge_list (void); |
58 | void free_edge_list (struct edge_list *); | |
59 | void print_edge_list (FILE *, struct edge_list *); | |
60 | void verify_edge_list (FILE *, struct edge_list *); | |
61 | edge find_edge (basic_block, basic_block); | |
62 | int find_edge_index (struct edge_list *, basic_block, basic_block); | |
63 | extern void remove_fake_edges (void); | |
64 | extern void remove_fake_exit_edges (void); | |
65 | extern void add_noreturn_fake_exit_edges (void); | |
66 | extern void connect_infinite_loops_to_exit (void); | |
67 | extern int post_order_compute (int *, bool, bool); | |
68 | extern basic_block dfs_find_deadend (basic_block); | |
6fa95e09 | 69 | extern void inverted_post_order_compute (vec<int> *postorder, sbitmap *start_points = 0); |
dd637013 AM |
70 | extern int pre_and_rev_post_order_compute_fn (struct function *, |
71 | int *, int *, bool); | |
72 | extern int pre_and_rev_post_order_compute (int *, int *, bool); | |
78ea9abc | 73 | extern int rev_post_order_and_mark_dfs_back_seme (struct function *, edge, |
3e61a205 RB |
74 | bitmap, bool, int *, |
75 | vec<std::pair<int, int> > *); | |
dd637013 AM |
76 | extern int dfs_enumerate_from (basic_block, int, |
77 | bool (*)(const_basic_block, const void *), | |
78 | basic_block *, int, const void *); | |
99b1c316 MS |
79 | extern void compute_dominance_frontiers (class bitmap_head *); |
80 | extern bitmap compute_idf (bitmap, class bitmap_head *); | |
dd637013 AM |
81 | extern void bitmap_intersection_of_succs (sbitmap, sbitmap *, basic_block); |
82 | extern void bitmap_intersection_of_preds (sbitmap, sbitmap *, basic_block); | |
83 | extern void bitmap_union_of_succs (sbitmap, sbitmap *, basic_block); | |
84 | extern void bitmap_union_of_preds (sbitmap, sbitmap *, basic_block); | |
85 | extern basic_block * single_pred_before_succ_order (void); | |
2965f127 JL |
86 | extern edge single_incoming_edge_ignoring_loop_edges (basic_block, bool); |
87 | extern edge single_pred_edge_ignoring_loop_edges (basic_block, bool); | |
88 | ||
dd637013 AM |
89 | |
90 | #endif /* GCC_CFGANAL_H */ |