For map, the following restriction changed in OpenMP 5.0:
- OpenMP 4.5 [18.104.22.168, Restrictions]: "A list item cannot appear in both a map clause and a data-sharing attribute clause on the same construct.
- OpenMP 5.0 [22.214.171.124, Restrictions]: "A list item cannot appear in both a map clause and a data-sharing attribute clause on the same construct unless the construct is a combined construct."
This patch removes this restriction in the case of combined constructs
and OpenMP 5.0, and it updates Sema not to capture a scalar by copy in
the target region when firstprivate and map appear for that scalar
on a combined target construct.
This patch also adds a fixme to a test that now reveals that a
diagnostic about loop iteration variables is dropped in the case of
OpenMP 5.0. That bug exists regardless of this patch's changes.