tree-ssa-operands.c (mark_difference_for_renaming): Use bitmap_xor.

2008-05-23  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (mark_difference_for_renaming): Use
	bitmap_xor.

From-SVN: r135799

gcc/ChangeLog

+2008-05-23  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-operands.c (mark_difference_for_renaming): Use
+	bitmap_xor.
+
 2008-05-23  Uros Bizjak  <ubizjak@gmail.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/tree-ssa-operands.c

@@ -2785,15 +2785,9 @@ mark_difference_for_renaming (bitmap s1, bitmap s2)
   else if (!bitmap_equal_p (s1, s2))
     {
       bitmap t1 = BITMAP_ALLOC (NULL);
-      bitmap t2 = BITMAP_ALLOC (NULL);
-
-      bitmap_and_compl (t1, s1, s2);
-      bitmap_and_compl (t2, s2, s1);
-      bitmap_ior_into (t1, t2);
+      bitmap_xor (t1, s1, s2);
       mark_set_for_renaming (t1);
-
       BITMAP_FREE (t1);
-      BITMAP_FREE (t2);
     }
 }