passes.c (execute_function_todo): Call compute_may_aliases only if flag_tree_pta is set.

2012-09-06  Richard Guenther  <rguenther@suse.de>

	* passes.c (execute_function_todo): Call compute_may_aliases
	only if flag_tree_pta is set.

From-SVN: r191015

gcc/ChangeLog

+2012-09-06  Richard Guenther  <rguenther@suse.de>
+
+	* passes.c (execute_function_todo): Call compute_may_aliases
+	only if flag_tree_pta is set.
+
 2012-09-06  Andrew Pinski  <apinski@cavium.com>
 
 	PR tree-opt/54494

gcc/passes.c

@@ -1776,7 +1776,8 @@ execute_function_todo (void *data)
   if (flags & TODO_rebuild_alias)
     {
       execute_update_addresses_taken ();
-      compute_may_aliases ();
+      if (flag_tree_pta)
+	compute_may_aliases ();
     }
   else if (optimize && (flags & TODO_update_address_taken))
     execute_update_addresses_taken ();