[Bug libgomp/92970] New: OpenACC 2.5: 'acc_delete' etc. on non-present data is a no-op

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92970

            Bug ID: 92970
           Summary: OpenACC 2.5: 'acc_delete' etc. on non-present data is
                    a no-op
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: openacc
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: burnus at gcc dot gnu.org, jakub at gcc dot gnu.org,
                    jules at gcc dot gnu.org
  Target Milestone: ---

OpenACC 2.5 states that 'acc_delete' etc. on non-present data is a no-op.

Note that this (silently!) changed in OpenACC 2.6 ff.: "a runtime error is
issued".  I filed <https://github.com/OpenACC/openacc-spec/issues/251> "OpenACC
2.5 vs. 2.6 ff. difference in 'acc_delete' etc. for non-present data".

GCC trunk should currently be implementing the OpenACC 2.5 semantics, but we
fail (at least for some variants).  I know of course how to easily fix this,
but will wait to first get the intended OpenACC semantics clarified.