| 1 |
684 |
jeremybenn |
/* Graph representation.
|
| 2 |
|
|
Copyright (C) 2007, 2008
|
| 3 |
|
|
Free Software Foundation, Inc.
|
| 4 |
|
|
|
| 5 |
|
|
This file is part of GCC.
|
| 6 |
|
|
|
| 7 |
|
|
GCC is free software; you can redistribute it and/or modify it under
|
| 8 |
|
|
the terms of the GNU General Public License as published by the Free
|
| 9 |
|
|
Software Foundation; either version 3, or (at your option) any later
|
| 10 |
|
|
version.
|
| 11 |
|
|
|
| 12 |
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
| 13 |
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 14 |
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 15 |
|
|
for more details.
|
| 16 |
|
|
|
| 17 |
|
|
You should have received a copy of the GNU General Public License
|
| 18 |
|
|
along with GCC; see the file COPYING3. If not see
|
| 19 |
|
|
<http://www.gnu.org/licenses/>. */
|
| 20 |
|
|
|
| 21 |
|
|
/* Structure representing edge of a graph. */
|
| 22 |
|
|
|
| 23 |
|
|
struct graph_edge
|
| 24 |
|
|
{
|
| 25 |
|
|
int src, dest; /* Source and destination. */
|
| 26 |
|
|
struct graph_edge *pred_next, *succ_next;
|
| 27 |
|
|
/* Next edge in predecessor and successor lists. */
|
| 28 |
|
|
void *data; /* Data attached to the edge. */
|
| 29 |
|
|
};
|
| 30 |
|
|
|
| 31 |
|
|
/* Structure representing vertex of a graph. */
|
| 32 |
|
|
|
| 33 |
|
|
struct vertex
|
| 34 |
|
|
{
|
| 35 |
|
|
struct graph_edge *pred, *succ;
|
| 36 |
|
|
/* Lists of predecessors and successors. */
|
| 37 |
|
|
int component; /* Number of dfs restarts before reaching the
|
| 38 |
|
|
vertex. */
|
| 39 |
|
|
int post; /* Postorder number. */
|
| 40 |
|
|
void *data; /* Data attached to the vertex. */
|
| 41 |
|
|
};
|
| 42 |
|
|
|
| 43 |
|
|
/* Structure representing a graph. */
|
| 44 |
|
|
|
| 45 |
|
|
struct graph
|
| 46 |
|
|
{
|
| 47 |
|
|
int n_vertices; /* Number of vertices. */
|
| 48 |
|
|
struct vertex *vertices;
|
| 49 |
|
|
/* The vertices. */
|
| 50 |
|
|
htab_t indices; /* Fast lookup for indices. */
|
| 51 |
|
|
};
|
| 52 |
|
|
|
| 53 |
|
|
struct graph *new_graph (int);
|
| 54 |
|
|
void dump_graph (FILE *, struct graph *);
|
| 55 |
|
|
struct graph_edge *add_edge (struct graph *, int, int);
|
| 56 |
|
|
void identify_vertices (struct graph *, int, int);
|
| 57 |
|
|
int graphds_dfs (struct graph *, int *, int,
|
| 58 |
|
|
VEC (int, heap) **, bool, bitmap);
|
| 59 |
|
|
int graphds_scc (struct graph *, bitmap);
|
| 60 |
|
|
void graphds_domtree (struct graph *, int, int *, int *, int *);
|
| 61 |
|
|
typedef void (*graphds_edge_callback) (struct graph *, struct graph_edge *);
|
| 62 |
|
|
void for_each_edge (struct graph *, graphds_edge_callback);
|
| 63 |
|
|
void free_graph (struct graph *g);
|
