Index: gcc/testsuite/gcc.dg/fold-notunord.c
===================================================================
--- gcc/testsuite/gcc.dg/fold-notunord.c	(revision 0)
+++ gcc/testsuite/gcc.dg/fold-notunord.c	(revision 0)
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-optimized" } */
+
+int f (double d)
+{
+  return !__builtin_isnan (d);
+}
+
+/* { dg-final { scan-tree-dump " ord " "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */

Property changes on: gcc/testsuite/gcc.dg/fold-notunord.c
___________________________________________________________________
Added: svn:eol-style
   + native
Added: svn:keywords
   + Author Date Id Revision URL

Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c	(revision 190071)
+++ gcc/fold-const.c	(working copy)
@@ -2087,26 +2087,28 @@ static tree
 pedantic_non_lvalue_loc (location_t loc, tree x)
 {
   if (pedantic_lvalues)
     return non_lvalue_loc (loc, x);
 
   return protected_set_expr_location_unshare (x, loc);
 }
 
 /* Given a tree comparison code, return the code that is the logical inverse.
    It is generally not safe to do this for floating-point comparisons, except
-   for EQ_EXPR and NE_EXPR, so we return ERROR_MARK in this case.  */
+   for EQ_EXPR, NE_EXPR, ORDERED_EXPR and UNORDERED_EXPR, so we return
+   ERROR_MARK in this case.  */
 
 enum tree_code
 invert_tree_comparison (enum tree_code code, bool honor_nans)
 {
-  if (honor_nans && flag_trapping_math && code != EQ_EXPR && code != NE_EXPR)
+  if (honor_nans && flag_trapping_math && code != EQ_EXPR && code != NE_EXPR
+      && code != ORDERED_EXPR && code != UNORDERED_EXPR)
     return ERROR_MARK;
 
   switch (code)
     {
     case EQ_EXPR:
       return NE_EXPR;
     case NE_EXPR:
       return EQ_EXPR;
     case GT_EXPR:
       return honor_nans ? UNLE_EXPR : LE_EXPR;