| /* Graph representation. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_GRAPHDS_H |
| #define GCC_GRAPHDS_H |
| |
| /* Structure representing edge of a graph. */ |
| |
| struct graph_edge |
| { |
| int src, dest; /* Source and destination. */ |
| struct graph_edge *pred_next, *succ_next; |
| /* Next edge in predecessor and successor lists. */ |
| void *data; /* Data attached to the edge. */ |
| }; |
| |
| /* Structure representing vertex of a graph. */ |
| |
| struct vertex |
| { |
| struct graph_edge *pred, *succ; |
| /* Lists of predecessors and successors. */ |
| int component; /* Number of dfs restarts before reaching the |
| vertex. */ |
| int post; /* Postorder number. */ |
| void *data; /* Data attached to the vertex. */ |
| }; |
| |
| /* Structure representing a graph. */ |
| |
| struct graph |
| { |
| int n_vertices; /* Number of vertices. */ |
| struct vertex *vertices; /* The vertices. */ |
| struct obstack ob; /* Obstack for vertex and edge allocation. */ |
| }; |
| |
| struct graph *new_graph (int); |
| void dump_graph (FILE *, struct graph *); |
| struct graph_edge *add_edge (struct graph *, int, int); |
| void identify_vertices (struct graph *, int, int); |
| typedef bool (*skip_edge_callback) (struct graph_edge *); |
| int graphds_dfs (struct graph *, int *, int, |
| vec<int> *, bool, bitmap, skip_edge_callback = NULL); |
| int graphds_scc (struct graph *, bitmap, skip_edge_callback = NULL); |
| void graphds_domtree (struct graph *, int, int *, int *, int *); |
| typedef void (*graphds_edge_callback) (struct graph *, |
| struct graph_edge *, void *); |
| void for_each_edge (struct graph *, graphds_edge_callback, void *); |
| void free_graph (struct graph *g); |
| |
| #endif /* GCC_GRAPHDS_H */ |