| /* { dg-do compile } */ | |
| /* { dg-options "-O2" } */ | |
| #include <stdatomic.h> | |
| #include <stdbool.h> | |
| bool | |
| foo (_Atomic int *v, int bit) | |
| { | |
| int mask = 1 << bit; | |
| return atomic_fetch_and_explicit (v, ~mask, memory_order_relaxed) & mask; | |
| } | |
| /* { dg-final { scan-assembler-times "lock;?\[ \t\]*btrl" 1 } } */ | |
| /* { dg-final { scan-assembler-not "cmpxchg" } } */ |