Hi!

In preparation for other changes:

On 2022-06-29T16:33:02+0200, Tobias Burnus <tobias@codesourcery.com> wrote:
> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.c-c++-common/requires-4-aux.c
> @@ -0,0 +1,13 @@
> +/* { dg-skip-if "" { *-*-* } } */
> +
> +#pragma omp requires reverse_offload
> +
> +/* Note: The file does not have neither of:
> +   declare target directives, device constructs or device routines.  */
> +
> +int x;
> +
> +void foo (void)
> +{
> +  x = 1;
> +}

> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.c-c++-common/requires-4.c
> @@ -0,0 +1,23 @@
> +/* { dg-do link { target offloading_enabled } } */
> +/* { dg-additional-options "-flto" } */
> +/* { dg-additional-sources requires-4-aux.c } */
> +
> +/* Check diagnostic by device-compiler's or host compiler's lto1.
> +   Other file uses: 'requires reverse_offload', but that's inactive as
> +   there are no declare target directives, device constructs nor device routines  */
> +
> +#pragma omp requires unified_address,unified_shared_memory
> +
> +int a[10];
> +extern void foo (void);
> +
> +int
> +main (void)
> +{
> +  #pragma omp target
> +  for (int i = 0; i < 10; i++)
> +    a[i] = 0;
> +
> +  foo ();
> +  return 0;
> +}

> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.c-c++-common/requires-5-aux.c
> @@ -0,0 +1,11 @@
> +/* { dg-skip-if "" { *-*-* } } */
> +
> +#pragma omp requires unified_shared_memory, unified_address, reverse_offload
> +
> +int x;
> +
> +void foo (void)
> +{
> +  #pragma omp target
> +  x = 1;
> +}

> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.c-c++-common/requires-5.c
> @@ -0,0 +1,20 @@
> +/* { dg-do run { target { offload_target_nvptx || offload_target_amdgcn } } } */
> +/* { dg-additional-sources requires-5-aux.c } */
> +
> +#pragma omp requires unified_shared_memory, unified_address, reverse_offload
> +
> +int a[10];
> +extern void foo (void);
> +
> +int
> +main (void)
> +{
> +  #pragma omp target
> +  for (int i = 0; i < 10; i++)
> +    a[i] = 0;
> +
> +  foo ();
> +  return 0;
> +}
> +
> +/* { dg-output "devices present but 'omp requires unified_address, unified_shared_memory, reverse_offload' cannot be fulfilled" } */

(The latter diagnostic later got conditionalized by 'GOMP_DEBUG=1'.)

OK to push the attached "Enhance 'libgomp.c-c++-common/requires-4.c',
'libgomp.c-c++-common/requires-5.c' testing"?


Grüße
 Thomas


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