re PR tree-optimization/17558 (internal compiler error: in merge_alias_info, at…

re PR tree-optimization/17558 (internal compiler error: in merge_alias_info, at tree-ssa-copy.c:182)

2004-09-20  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/17558
        * tree-ssa-copy.c (may_propagate_copy): Only allow if the
        aliasing sets are the same rather than just conflicting.

From-SVN: r87772

gcc/ChangeLog

+2004-09-20  Andrew Pinski  <pinskia@physics.uc.edu>
+
+	PR tree-opt/17558
+	* tree-ssa-copy.c (may_propagate_copy): Only allow if the
+	aliasing sets are the same rather than just conflicting.
+
 2004-09-20  Jan Hubicka  <jh@suse.cz>
 
 	PR middle-end/16460

gcc/tree-ssa-copy.c

@@ -112,8 +112,8 @@ may_propagate_copy (tree dest, tree orig)
 	return false;
       else if (!lang_hooks.types_compatible_p (type_d, type_o))
 	return false;
-      else if (!alias_sets_conflict_p (get_alias_set (TREE_TYPE (type_d)),
-				       get_alias_set (TREE_TYPE (type_o))))
+      else if (get_alias_set (TREE_TYPE (type_d)) != 
+	       get_alias_set (TREE_TYPE (type_o)))
 	return false;
     }