libgomp/testsuite/libgomp.c/pr26943-3.c

   1 /* PR c++/26943 */
   2 /* { dg-do run } */
   3
   4 extern int omp_set_dynamic (int);
   5 extern int omp_get_thread_num (void);
   6 extern void abort (void);
   7
   8 int a = 8, b = 12, c = 16, d = 20, j = 0, l = 0;
   9 char e[10] = "a", f[10] = "b", g[10] = "c", h[10] = "d";
  10 volatile int k;
  11
  12 int
  13 main (void)
  14 {
  15   int i;
  16   omp_set_dynamic (0);
  17   omp_set_nested (1);
  18 #pragma omp parallel num_threads (2) reduction (+:l)
  19   if (k == omp_get_thread_num ())
  20     {
  21 #pragma omp parallel for shared (a, e) firstprivate (b, f) \
  22                          lastprivate (c, g) private (d, h) \
  23                          schedule (static, 1) num_threads (4) \
  24                          reduction (+:j)
  25       for (i = 0; i < 4; i++)
  26         {
  27           if (a != 8 || b != 12 || e[0] != 'a' || f[0] != 'b')
  28             j++;
  29 #pragma omp barrier     /* { dg-warning "may not be closely nested" } */
  30 #pragma omp atomic
  31           a += i;
  32           b += i;
  33           c = i;
  34           d = i;
  35 #pragma omp atomic
  36           e[0] += i;
  37           f[0] += i;
  38           g[0] = 'g' + i;
  39           h[0] = 'h' + i;
  40 #pragma omp barrier     /* { dg-warning "may not be closely nested" } */
  41           if (a != 8 + 6 || b != 12 + i || c != i || d != i)
  42             j += 8;
  43           if (e[0] != 'a' + 6 || f[0] != 'b' + i || g[0] != 'g' + i)
  44             j += 64;
  45           if (h[0] != 'h' + i)
  46             j += 512;
  47         }
  48       if (j || a != 8 + 6 || b != 12 || c != 3 || d != 20)
  49         ++l;
  50       if (e[0] != 'a' + 6 || f[0] != 'b' || g[0] != 'g' + 3 || h[0] != 'd')
  51         l += 8;
  52     }
  53   if (l)
  54     abort ();
  55   return 0;
  56 }