re PR tree-optimization/47849 (ICE: SIGSEGV in find_edge (cfganal.c:491) with…

re PR tree-optimization/47849 (ICE: SIGSEGV in find_edge (cfganal.c:491) with -ftree-loop-if-convert -fno-tree-reassoc)

2011-02-23  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47849
	* tree-if-conv.c (main_tree_if_conversion): Free postdom info.

From-SVN: r170441

gcc/ChangeLog

+2011-02-23  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/47849
+	* tree-if-conv.c (main_tree_if_conversion): Free postdom info.
+
 2011-02-23  Jie Zhang  <jie@codesourcery.com>
 
 	* opts-common.c (decode_cmdline_option): Print empty string

gcc/tree-if-conv.c

@@ -1741,6 +1741,8 @@ main_tree_if_conversion (void)
   if (changed && flag_tree_loop_if_convert_stores)
     todo |= TODO_update_ssa_only_virtuals;
 
+  free_dominance_info (CDI_POST_DOMINATORS);
+
   return todo;
 }