offload/test/api/omp_host_pinned_memory.c

   1 // RUN: %libomptarget-compile-run-and-check-generic
   2
   3 #include <omp.h>
   4 #include <stdio.h>
   5
   6 // Allocate pinned memory on the host
   7 void *llvm_omp_target_alloc_host(size_t, int);
   8 void llvm_omp_target_free_host(void *, int);
   9
  10 int main() {
  11   const int N = 64;
  12   const int device = omp_get_default_device();
  13   const int host = omp_get_initial_device();
  14
  15   int *hst_ptr = llvm_omp_target_alloc_host(N * sizeof(int), device);
  16
  17   for (int i = 0; i < N; ++i)
  18     hst_ptr[i] = 2;
  19
  20 #pragma omp target teams distribute parallel for device(device)                \
  21     map(tofrom : hst_ptr[0 : N])
  22   for (int i = 0; i < N; ++i)
  23     hst_ptr[i] -= 1;
  24
  25   int sum = 0;
  26   for (int i = 0; i < N; ++i)
  27     sum += hst_ptr[i];
  28
  29   llvm_omp_target_free_host(hst_ptr, device);
  30   // CHECK: PASS
  31   if (sum == N)
  32     printf("PASS\n");
  33 }