| // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s | |
| // rdar://7536390 | |
| typedef unsigned __INT32_TYPE__ uint32_t; | |
| unsigned t(uint32_t *ptr, uint32_t val) { | |
| // CHECK: @t | |
| // CHECK: atomicrmw xchg ptr {{.*}} seq_cst, align 4 | |
| return __sync_lock_test_and_set(ptr, val); | |
| } |