1  /* PR target/96176 */
       2  /* { dg-do compile { target lp64 } } */
       3  /* { dg-options "-O2" } */
       4  /* { dg-final { scan-assembler-not "\tcmpb\t" } } */
       5  
       6  _Bool
       7  foo (unsigned char *x, unsigned char y, unsigned char z)
       8  {
       9    unsigned char y_old = y;
      10    __atomic_compare_exchange_n (x, &y, z, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);
      11    return y == y_old;
      12  }