gcc/testsuite/gcc.dg/20030414-2.c

   1 /* Copyright (C) 2003 Free Software Foundation.
   2
   3    Check that constant folding (c1 - x) op c2 into x swap(op) c1-c2
   4    doesn't break anything.
   5
   6    Written by Roger Sayle, 27th March 2003.  */
   7
   8 /* { dg-do run } */
   9 /* { dg-options "-O2 -ffast-math" } */
  10
  11 extern void abort (void);
  12
  13 int foo(double x)
  14 {
  15   return (10.0 - x) > 3.0;
  16 }
  17
  18 int bar (double x)
  19 {
  20   return (10.0 - x) == 5.0;
  21 }
  22
  23 int main()
  24 {
  25   if (foo (8.0))
  26     abort ();
  27
  28   if (! foo (6.0))
  29     abort ();
  30
  31   if (bar (1.0))
  32     abort ();
  33
  34   if (! bar (5.0))
  35     abort ();
  36   return 0;
  37 }
  38