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Initialize the graph's depth first order array.

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Unreachable nodes will cause the first elements of the array to remain
unwritten by df_search. This fixes the segfaults caused by unreachable
nodes (the reason they were an internal error before).
This commit is contained in:
Bill Currie 2012-12-19 15:55:29 +09:00
parent a7e9defebd
commit 32556b7210
1 changed files with 1 additions and 1 deletions
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2
tools/qfcc/source/flow.c
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@ -1042,7 +1042,7 @@ flow_build_dfst (flowgraph_t *graph)
set_add (visited, graph->num_nodes);
set_add (visited, graph->num_nodes + 1);
graph->dfo = malloc (graph->num_nodes * sizeof (unsigned));
graph->dfo = calloc (graph->num_nodes, sizeof (unsigned));
graph->dfst = set_new ();
i = graph->num_nodes;
df_search (graph, visited, &i, 0);