openmp/tools/archer/tests/parallel/parallel-simple2.c

   1 /*
   2  * parallel-simple2.c -- Archer testcase
   3  */
   4
   5 //===----------------------------------------------------------------------===//
   6 //
   7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   8 //
   9 // See tools/archer/LICENSE.txt for details.
  10 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14
  15 // RUN: %libarcher-compile-and-run  | FileCheck %s
  16 // REQUIRES: tsan
  17 #include <omp.h>
  18 #include <stdio.h>
  19
  20 int main(int argc, char *argv[]) {
  21   int var = 0;
  22
  23 // Create team of threads so that there is no implicit happens before
  24 // when creating the thread.
  25 #pragma omp parallel num_threads(2)
  26   {}
  27
  28   var++;
  29
  30 #pragma omp parallel num_threads(2) shared(var)
  31   {
  32     if (omp_get_thread_num() == 1) {
  33       var++;
  34     }
  35   } // implicit barrier
  36
  37   fprintf(stderr, "DONE\n");
  38   int error = (var != 2);
  39   return error;
  40 }
  41
  42 // CHECK-NOT: ThreadSanitizer: data race
  43 // CHECK-NOT: ThreadSanitizer: reported
  44 // CHECK: DONE