gcc/testsuite/gcc.c-torture/execute/compare-2.c

   1 /* Copyright (C) 2002 Free Software Foundation.
   2
   3    Ensure that the composite comparison optimization doesn't misfire
   4    and attempt to combine a signed comparison with an unsigned one.
   5
   6    Written by Roger Sayle, 3rd June 2002.  */
   7
   8 extern void abort (void);
   9
  10 int
  11 foo (int x, int y)
  12 {
  13   /* If miscompiled the following may become "x == y".  */
  14   return (x<=y) && ((unsigned int)x >= (unsigned int)y);
  15 }
  16
  17 int
  18 main ()
  19 {
  20   if (! foo (-1,0))
  21     abort ();
  22   return 0;
  23 }
  24