llvm-project/compiler-rt/test/tsan/bench_acquire_only.cc

// RUN: %clangxx_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s

// bench.h needs pthread barriers which are not available on OS X
// UNSUPPORTED: darwin

#include "bench.h"

int x;

void thread(int tid) {
  for (int i = 0; i < bench_niter; i++)
    __atomic_load_n(&x, __ATOMIC_ACQUIRE);
}

void bench() {
  __atomic_store_n(&x, 0, __ATOMIC_RELEASE);
  start_thread_group(bench_nthread, thread);
}

// CHECK: DONE