libgomp/testsuite/libgomp.c/pr26943-4.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                      firstprivate (a, b, c, d, e, f, g, h, j)
  20   if (k == omp_get_thread_num ())
  21     {
  22 #pragma omp parallel for shared (a, e) firstprivate (b, f) \
  23                          lastprivate (c, g) private (d, h) \
  24                          schedule (static, 1) num_threads (4) \
  25                          reduction (+:j)
  26       for (i = 0; i < 4; i++)
  27         {
  28           if (a != 8 || b != 12 || e[0] != 'a' || f[0] != 'b')
  29             j++;
  30 #pragma omp barrier     /* { dg-warning "may not be closely nested" } */
  31 #pragma omp atomic
  32           a += i;
  33           b += i;
  34           c = i;
  35           d = i;
  36 #pragma omp atomic
  37           e[0] += i;
  38           f[0] += i;
  39           g[0] = 'g' + i;
  40           h[0] = 'h' + i;
  41 #pragma omp barrier     /* { dg-warning "may not be closely nested" } */
  42           if (a != 8 + 6 || b != 12 + i || c != i || d != i)
  43             j += 8;
  44           if (e[0] != 'a' + 6 || f[0] != 'b' + i || g[0] != 'g' + i)
  45             j += 64;
  46           if (h[0] != 'h' + i)
  47             j += 512;
  48         }
  49       if (j || a != 8 + 6 || b != 12 || c != 3 || d != 20)
  50         ++l;
  51       if (e[0] != 'a' + 6 || f[0] != 'b' || g[0] != 'g' + 3 || h[0] != 'd')
  52         l += 8;
  53     }
  54   if (l)
  55     abort ();
  56   if (a != 8 || b != 12 || c != 16 || d != 20)
  57     abort ();
  58   if (e[0] != 'a' || f[0] != 'b' || g[0] != 'c' || h[0] != 'd')
  59     abort ();
  60   return 0;
  61 }