libgomp/testsuite/libgomp.oacc-c-c++-common/kernels-parallel-loop-data-enter-exit.c

   1 #include <stdlib.h>
   2
   3 #define N (1024 * 512)
   4 #define COUNTERTYPE unsigned int
   5
   6 int
   7 main (void)
   8 {
   9   unsigned int *__restrict a;
  10   unsigned int *__restrict b;
  11   unsigned int *__restrict c;
  12
  13   a = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
  14   b = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
  15   c = (unsigned int *__restrict)malloc (N * sizeof (unsigned int));
  16
  17 #pragma acc enter data create (a[0:N], b[0:N], c[0:N])
  18
  19 #pragma acc kernels present (a[0:N])
  20   {
  21     for (COUNTERTYPE i = 0; i < N; i++)
  22       a[i] = i * 2;
  23   }
  24
  25 #pragma acc parallel present (b[0:N])
  26   {
  27 #pragma acc loop
  28     for (COUNTERTYPE i = 0; i < N; i++)
  29       b[i] = i * 4;
  30   }
  31
  32 #pragma acc kernels present (a[0:N], b[0:N], c[0:N])
  33   {
  34     for (COUNTERTYPE ii = 0; ii < N; ii++)
  35       c[ii] = a[ii] + b[ii];
  36   }
  37
  38 #pragma acc exit data copyout (a[0:N], b[0:N], c[0:N])
  39
  40   for (COUNTERTYPE i = 0; i < N; i++)
  41     if (c[i] != a[i] + b[i])
  42       abort ();
  43
  44   free (a);
  45   free (b);
  46   free (c);
  47
  48   return 0;
  49 }