re PR middle-end/31950 (ICE in tree-ssa-alias-warnings.c)

2007-06-19  Richard Guenther  <rguenther@suse.de>

	PR middle-end/31950
	* tree-ssa-alias-warnings.c (ffan_walker): Punt on MTAGs.

From-SVN: r125846

gcc/ChangeLog

+2007-06-19  Richard Guenther  <rguenther@suse.de>
+
+	PR middle-end/31950
+	* tree-ssa-alias-warnings.c (ffan_walker): Punt on MTAGs.
+
 2007-06-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/32353

gcc/tree-ssa-alias-warnings.c

@@ -635,7 +635,7 @@ ffan_walker (tree *t,
              int *go_below ATTRIBUTE_UNUSED,
              void *data ATTRIBUTE_UNUSED)
 {
-  if (DECL_P (*t) && DECL_ARTIFICIAL (*t))
+  if (DECL_P (*t) && !MTAG_P (*t) && DECL_ARTIFICIAL (*t))
     return *t;
   else
     return NULL_TREE;