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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   if (tid == 0) {
13     for (int i = 0; i < bench_niter; i++)
14       __atomic_store_n(&x, 0, __ATOMIC_RELEASE);
15   } else {
16     for (int i = 0; i < bench_niter; i++)
17       __atomic_load_n(&x, __ATOMIC_ACQUIRE);
18   }
19 }
20 
bench()21 void bench() {
22   start_thread_group(bench_nthread, thread);
23 }
24 
25 // CHECK: DONE
26 
27