1*38fd1498Szrj /* Control flow graph analysis header file. 2*38fd1498Szrj Copyright (C) 2014-2018 Free Software Foundation, Inc. 3*38fd1498Szrj 4*38fd1498Szrj This file is part of GCC. 5*38fd1498Szrj 6*38fd1498Szrj GCC is free software; you can redistribute it and/or modify it under 7*38fd1498Szrj the terms of the GNU General Public License as published by the Free 8*38fd1498Szrj Software Foundation; either version 3, or (at your option) any later 9*38fd1498Szrj version. 10*38fd1498Szrj 11*38fd1498Szrj GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or 13*38fd1498Szrj FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14*38fd1498Szrj for more details. 15*38fd1498Szrj 16*38fd1498Szrj You should have received a copy of the GNU General Public License 17*38fd1498Szrj along with GCC; see the file COPYING3. If not see 18*38fd1498Szrj <http://www.gnu.org/licenses/>. */ 19*38fd1498Szrj 20*38fd1498Szrj 21*38fd1498Szrj #ifndef GCC_CFGANAL_H 22*38fd1498Szrj #define GCC_CFGANAL_H 23*38fd1498Szrj 24*38fd1498Szrj /* This structure maintains an edge list vector. */ 25*38fd1498Szrj /* FIXME: Make this a vec<edge>. */ 26*38fd1498Szrj struct edge_list 27*38fd1498Szrj { 28*38fd1498Szrj int num_edges; 29*38fd1498Szrj edge *index_to_edge; 30*38fd1498Szrj }; 31*38fd1498Szrj 32*38fd1498Szrj 33*38fd1498Szrj /* Class to compute and manage control dependences on an edge-list. */ 34*38fd1498Szrj class control_dependences 35*38fd1498Szrj { 36*38fd1498Szrj public: 37*38fd1498Szrj control_dependences (); 38*38fd1498Szrj ~control_dependences (); 39*38fd1498Szrj bitmap get_edges_dependent_on (int); 40*38fd1498Szrj basic_block get_edge_src (int); 41*38fd1498Szrj basic_block get_edge_dest (int); 42*38fd1498Szrj 43*38fd1498Szrj private: 44*38fd1498Szrj void set_control_dependence_map_bit (basic_block, int); 45*38fd1498Szrj void clear_control_dependence_bitmap (basic_block); 46*38fd1498Szrj void find_control_dependence (int); 47*38fd1498Szrj vec<bitmap> control_dependence_map; 48*38fd1498Szrj vec<std::pair<int, int> > m_el; 49*38fd1498Szrj }; 50*38fd1498Szrj 51*38fd1498Szrj extern bool mark_dfs_back_edges (void); 52*38fd1498Szrj extern void find_unreachable_blocks (void); 53*38fd1498Szrj extern void verify_no_unreachable_blocks (void); 54*38fd1498Szrj struct edge_list * create_edge_list (void); 55*38fd1498Szrj void free_edge_list (struct edge_list *); 56*38fd1498Szrj void print_edge_list (FILE *, struct edge_list *); 57*38fd1498Szrj void verify_edge_list (FILE *, struct edge_list *); 58*38fd1498Szrj edge find_edge (basic_block, basic_block); 59*38fd1498Szrj int find_edge_index (struct edge_list *, basic_block, basic_block); 60*38fd1498Szrj extern void remove_fake_edges (void); 61*38fd1498Szrj extern void remove_fake_exit_edges (void); 62*38fd1498Szrj extern void add_noreturn_fake_exit_edges (void); 63*38fd1498Szrj extern void connect_infinite_loops_to_exit (void); 64*38fd1498Szrj extern int post_order_compute (int *, bool, bool); 65*38fd1498Szrj extern basic_block dfs_find_deadend (basic_block); 66*38fd1498Szrj extern void inverted_post_order_compute (vec<int> *postorder, sbitmap *start_points = 0); 67*38fd1498Szrj extern int pre_and_rev_post_order_compute_fn (struct function *, 68*38fd1498Szrj int *, int *, bool); 69*38fd1498Szrj extern int pre_and_rev_post_order_compute (int *, int *, bool); 70*38fd1498Szrj extern int dfs_enumerate_from (basic_block, int, 71*38fd1498Szrj bool (*)(const_basic_block, const void *), 72*38fd1498Szrj basic_block *, int, const void *); 73*38fd1498Szrj extern void compute_dominance_frontiers (struct bitmap_head *); 74*38fd1498Szrj extern bitmap compute_idf (bitmap, struct bitmap_head *); 75*38fd1498Szrj extern void bitmap_intersection_of_succs (sbitmap, sbitmap *, basic_block); 76*38fd1498Szrj extern void bitmap_intersection_of_preds (sbitmap, sbitmap *, basic_block); 77*38fd1498Szrj extern void bitmap_union_of_succs (sbitmap, sbitmap *, basic_block); 78*38fd1498Szrj extern void bitmap_union_of_preds (sbitmap, sbitmap *, basic_block); 79*38fd1498Szrj extern basic_block * single_pred_before_succ_order (void); 80*38fd1498Szrj extern edge single_incoming_edge_ignoring_loop_edges (basic_block, bool); 81*38fd1498Szrj extern edge single_pred_edge_ignoring_loop_edges (basic_block, bool); 82*38fd1498Szrj 83*38fd1498Szrj 84*38fd1498Szrj #endif /* GCC_CFGANAL_H */ 85