diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f9b2af2fa852..6538ff096f8c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-03-23  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/70251
+	* match.pd (A + (B vcmp C ? 1 : 0) -> A - (B vcmp C)): Adjust
+	mode compatibility check.
+	(A - (B vcmp C ? 1 : 0) -> A + (B vcmp C)): Likewise.
+
 2016-03-23  Jeff Law  <law@redhat.com>
 
 	PR tree-optimization/64058
diff --git a/gcc/match.pd b/gcc/match.pd
index 388a489dcb86..c0ed305ed0e8 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -1759,18 +1759,18 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
 (simplify
  (plus:c @3 (view_convert? (vec_cond:s @0 integer_each_onep@1 integer_zerop@2)))
  (if (VECTOR_TYPE_P (type)
-      && TYPE_VECTOR_SUBPARTS (type) == TYPE_VECTOR_SUBPARTS (TREE_TYPE (@0))
+      && TYPE_VECTOR_SUBPARTS (type) == TYPE_VECTOR_SUBPARTS (TREE_TYPE (@1))
       && (TYPE_MODE (TREE_TYPE (type))
-          == TYPE_MODE (TREE_TYPE (TREE_TYPE (@0)))))
+          == TYPE_MODE (TREE_TYPE (TREE_TYPE (@1)))))
   (minus @3 (view_convert (vec_cond @0 (negate @1) @2)))))
 
 /* ... likewise A - (B vcmp C ? 1 : 0) -> A + (B vcmp C ? -1 : 0).  */
 (simplify
  (minus @3 (view_convert? (vec_cond:s @0 integer_each_onep@1 integer_zerop@2)))
  (if (VECTOR_TYPE_P (type)
-      && TYPE_VECTOR_SUBPARTS (type) == TYPE_VECTOR_SUBPARTS (TREE_TYPE (@0))
+      && TYPE_VECTOR_SUBPARTS (type) == TYPE_VECTOR_SUBPARTS (TREE_TYPE (@1))
       && (TYPE_MODE (TREE_TYPE (type))
-          == TYPE_MODE (TREE_TYPE (TREE_TYPE (@0)))))
+          == TYPE_MODE (TREE_TYPE (TREE_TYPE (@1)))))
   (plus @3 (view_convert (vec_cond @0 (negate @1) @2)))))