libgomp/testsuite/libgomp.c-c++-common/requires-4a.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 /* Same as requires-4.c, but uses heap memory for 'a'.  */
   7
   8 /* Check no diagnostic by device-compiler's or host compiler's lto1.
   9    Other file uses: 'requires reverse_offload', but that's inactive as
  10    there are no declare target directives, device constructs nor device routines  */
  11
  12 /* Depending on offload device capabilities, it may print something like the
  13    following (only) if GOMP_DEBUG=1:
  14    "devices present but 'omp requires unified_address, unified_shared_memory, reverse_offload' cannot be fulfilled"
  15    and in that case does host-fallback execution.
  16
  17    No offload devices support USM at present, so we may verify host-fallback
  18    execution by presence of separate memory spaces.  */
  19
  20 #pragma omp requires unified_address,unified_shared_memory
  21
  22 int *a;
  23 extern void foo (void);
  24
  25 int
  26 main (void)
  27 {
  28   a = (int *) __builtin_calloc (sizeof (int), 10);
  29   #pragma omp target map(to: a)
  30   for (int i = 0; i < 10; i++)
  31     a[i] = i;
  32
  33   for (int i = 0; i < 10; i++)
  34     if (a[i] != i)
  35       __builtin_abort ();
  36
  37   foo ();
  38   __builtin_free (a);
  39   return 0;
  40 }