libgomp/testsuite/libgomp.c-c++-common/requires-4.c

   1 /* { dg-require-effective-target lto } */
   2 /* { dg-additional-options "-flto" } */
   3 /* { dg-additional-options "-foffload-options=nvptx-none=-misa=sm_35" { target { offload_target_nvptx } } } */
   4 /* { dg-additional-sources requires-4-aux.c } */
   5
   6 /* Check no diagnostic by device-compiler's or host compiler's lto1.
   7    Other file uses: 'requires reverse_offload', but that's inactive as
   8    there are no declare target directives, device constructs nor device routines  */
   9
  10 /* Depending on offload device capabilities, it may print something like the
  11    following (only) if GOMP_DEBUG=1:
  12    "devices present but 'omp requires unified_address, unified_shared_memory, reverse_offload' cannot be fulfilled"
  13    and in that case does host-fallback execution.
  14
  15    No offload devices support USM at present, so we may verify host-fallback
  16    execution by presence of separate memory spaces.  */
  17
  18 #pragma omp requires unified_address,unified_shared_memory
  19
  20 int a[10] = { 0 };
  21 extern void foo (void);
  22
  23 int
  24 main (void)
  25 {
  26   #pragma omp target map(to: a)
  27   for (int i = 0; i < 10; i++)
  28     a[i] = i;
  29
  30   for (int i = 0; i < 10; i++)
  31     if (a[i] != i)
  32       __builtin_abort ();
  33
  34   foo ();
  35   return 0;
  36 }