xref: /llvm-project/openmp/tools/archer/tests/parallel/parallel-simple2.c (revision 77ad98c80881ba90bf18ec2780169c60e02c159b)

/*
 * parallel-simple2.c -- Archer testcase
 */

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
//
// See tools/archer/LICENSE.txt for details.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//


// RUN: %libarcher-compile-and-run  | FileCheck %s
// REQUIRES: tsan
#include <omp.h>
#include <stdio.h>

int main(int argc, char *argv[]) {
  int var = 0;

// Create team of threads so that there is no implicit happens before
// when creating the thread.
#pragma omp parallel num_threads(2)
  {}

  var++;

#pragma omp parallel num_threads(2) shared(var)
  {
    if (omp_get_thread_num() == 1) {
      var++;
    }
  } // implicit barrier

  fprintf(stderr, "DONE\n");
  int error = (var != 2);
  return error;
}

// CHECK-NOT: ThreadSanitizer: data race
// CHECK-NOT: ThreadSanitizer: reported
// CHECK: DONE