commit d514c81a7965fd24b9d8c294b12179b2369c8aa4
Author: Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Date:   Tue Jul 21 10:18:31 2015 +0100

    [match.pd] Restrict -(A + B) -> (-B) - A to integral or float types

diff --git a/gcc/match.pd b/gcc/match.pd
index 3d7b32e..29367f2 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -515,7 +515,8 @@ along with GCC; see the file COPYING3.  If not see
 /* -(A + B) -> (-B) - A.  */
 (simplify
  (negate (plus:c @0 negate_expr_p@1))
- (if (!HONOR_SIGN_DEPENDENT_ROUNDING (element_mode (type))
+ (if ((FLOAT_TYPE_P (type) || INTEGRAL_TYPE_P (type))
+      && !HONOR_SIGN_DEPENDENT_ROUNDING (element_mode (type))
       && !HONOR_SIGNED_ZEROS (element_mode (type)))
   (minus (negate @1) @0)))