gcc/testsuite/gcc.c-torture/execute/pr27671-1.c

   1 /* PR rtl-optimization/27671.
   2    The combiner used to simplify "a ^ b == a" to "a" via
   3    simplify_relational_operation_1 in simplify-rtx.c.  */
   4
   5 extern void abort (void) __attribute__ ((noreturn));
   6 extern void exit (int) __attribute__ ((noreturn));
   7
   8 static int __attribute__((noinline))
   9 foo (int a, int b)
  10 {
  11   int c = a ^ b;
  12   if (c == a)
  13     abort ();
  14 }
  15
  16 int
  17 main (void)
  18 {
  19   foo (0, 1);
  20   exit (0);
  21 }