| /* Both these atomic operations should be optimized to an exchange operation. |
| Test that it at happens on x86 by making sure there are 2 xchg's and no |
| compare_exchange loop. */ |
| |
| /* { dg-do compile { target { i?86-*-* x86_64-*-* } } } */ |
| /* { dg-require-effective-target sync_int_long } */ |
| /* { dg-final { scan-assembler-times "cmpxchg" 0 } } */ |
| /* { dg-final { scan-assembler-times "xchg" 2 } } */ |
| |
| int x; |
| |
| int f() |
| { |
| return __atomic_fetch_and (&x, 0, __ATOMIC_RELAXED); |
| } |
| |
| int g() |
| { |
| return __atomic_fetch_or (&x, -1, __ATOMIC_RELAXED); |
| } |
