dfs_free forgot to free its obstack

diff --git a/ir/ana/dfs.c b/ir/ana/dfs.c
index 52d1cb0..7addd1d 100644 (file)
--- a/ir/ana/dfs.c
+++ b/ir/ana/dfs.c
@@ -207,6 +207,7 @@ dfs_t *dfs_new(const absgraph_t *graph_impl, void *graph_self)
 
 void dfs_free(dfs_t *dfs)
 {
+       obstack_free(&dfs->obst, NULL);
        del_set(dfs->nodes);
        del_set(dfs->edges);
        xfree(dfs->pre_order);