1  /* PR54087.  Verify __atomic_sub (val) uses __atomic_add (-val) if there is no
       2               atomic_aub.  */
       3  /* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */
       4  /* { dg-require-effective-target sync_int_long } */
       5  /* { dg-final { scan-assembler-times "xadd" 2 } } */
       6  
       7  
       8  int a;
       9  
      10  int f1(int p)
      11  {
      12    return __atomic_sub_fetch(&a, p, __ATOMIC_SEQ_CST) == 0;
      13  }
      14  
      15  int f2(int p)
      16  {
      17    return __atomic_fetch_sub(&a, p, __ATOMIC_SEQ_CST) - p == 0;
      18  }