1 // RUN: %clangxx_tsan %s -o %t
2 // RUN: %run %t 2>&1 | FileCheck %s
3 
4 // bench.h needs pthread barriers which are not available on OS X
5 // UNSUPPORTED: darwin
6 
7 #include "bench.h"
8 
9 int x;
10 
thread(int tid)11 void thread(int tid) {
12   for (int i = 0; i < bench_niter; i++)
13     __atomic_load_n(&x, __ATOMIC_ACQUIRE);
14 }
15 
bench()16 void bench() {
17   __atomic_store_n(&x, 0, __ATOMIC_RELEASE);
18   start_thread_group(bench_nthread, thread);
19 }
20 
21 // CHECK: DONE
22 
23