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Diffstat (limited to 'gcc/graphds.h')
-rw-r--r-- | gcc/graphds.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/gcc/graphds.h b/gcc/graphds.h new file mode 100644 index 00000000000..2aad4b00a73 --- /dev/null +++ b/gcc/graphds.h @@ -0,0 +1,63 @@ +/* Graph representation. + Copyright (C) 2007 + 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 2, 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 COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ + +/* Structure representing edge of a graph. */ + +struct edge +{ + int src, dest; /* Source and destination. */ + struct 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 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 graph *new_graph (int); +void dump_graph (FILE *, struct graph *); +struct edge *add_edge (struct graph *, int, int); +void identify_vertices (struct graph *, int, int); +int graphds_dfs (struct graph *, int *, int, + VEC (int, heap) **, bool, bitmap); +int graphds_scc (struct graph *, bitmap); +void graphds_domtree (struct graph *, int, int *, int *, int *); +typedef void (*graphds_edge_callback) (struct graph *, struct edge *); +void for_each_edge (struct graph *, graphds_edge_callback); +void free_graph (struct graph *g); |