testsuite/libgomp.c/pr36802-2.c

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/* PR middle-end/36802 */

extern void abort (void);

int q;

int
foo (int k)
{
  int i = 6, n = 0;
  omp_set_dynamic (0);
  omp_set_nested (1);
#pragma omp parallel shared (i) num_threads (3)
  {
    int l;

    if (omp_get_num_threads () != 3)
    #pragma omp atomic
      n += 1;
    else
    #pragma omp for
      for (l = 0; l < 3; l++)
    if (k)
    #pragma omp atomic
      q += i;
    else
    #pragma omp parallel shared (i) num_threads (4)
      {
        if (omp_get_num_threads () != 4)
        #pragma omp atomic
          n += 1;
        #pragma omp critical
          i += 1;
      }
  }
  if (n == 0 && i != 6 + 3 * 4)
    abort ();
  return 0;
}

int
main (void)
{
  foo (0);
  return 0;
}

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