libgomp/testsuite/libgomp.oacc-c-c++-common/kernels-private-vars-loop-worker-1.c

   1 #include <assert.h>
   2
   3 /* Test of worker-private variables declared on a loop directive.  */
   4
   5 int
   6 main (int argc, char* argv[])
   7 {
   8   int x = 5, i, arr[32 * 32];
   9
  10   for (i = 0; i < 32 * 32; i++)
  11     arr[i] = i;
  12
  13   #pragma acc kernels copy(arr)
  14   {
  15     int j;
  16
  17     #pragma acc loop gang(num:32)
  18     for (i = 0; i < 32; i++)
  19       {
  20         #pragma acc loop worker(num:32) private(x)
  21         for (j = 0; j < 32; j++)
  22           {
  23             x = i ^ j * 3;
  24             /* Try to ensure 'x' accesses doesn't get optimized into a
  25                temporary.  */
  26             __asm__ __volatile__ ("");
  27             arr[i * 32 + j] += x;
  28           }
  29       }
  30   }
  31
  32   for (i = 0; i < 32 * 32; i++)
  33     assert (arr[i] == i + ((i / 32) ^ (i % 32) * 3));
  34
  35   return 0;
  36 }