--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/20030414-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,38 @@
+/* Copyright (C) 2003 Free Software Foundation.
+
+   Check that constant folding (c1 - x) op c2 into x swap(op) c1-c2
+   doesn't break anything.
+
+   Written by Roger Sayle, 27th March 2003.  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -ffast-math" } */
+
+extern void abort (void);
+
+int foo(double x)
+{
+  return (10.0 - x) > 3.0;
+}
+
+int bar (double x)
+{
+  return (10.0 - x) == 5.0;
+}
+
+int main()
+{
+  if (foo (8.0))
+    abort ();
+
+  if (! foo (6.0))
+    abort ();
+
+  if (bar (1.0))
+    abort ();
+
+  if (! bar (5.0))
+    abort ();
+  return 0;
+}
+