clang-tests/gcc-4_2-testsuite/src/gcc.c-torture/execute/20060102-1.c

extern void abort ();

int f(int x)
{
  return (x >> 31) ? -1 : 1;
}

volatile int one = 1;
int main (void)
{
  /* Test that the function above returns different values for
     different signs.  */
  if (f(one) == f(-one))
    abort ();
  return 0;
}