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

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