[openacc] reference-typed data mappings
Mon Feb 1 17:58:00 GMT 2016
This patch fixes a couple of bugs preventing c++ reference-typed
variables from working in openacc data clauses. These fixes include:
* Teach the gimplifier to filter out pointer data mappings for
OACC_DATA, OACC_ENTER_DATA, OACC_EXIT_DATA and OACC_UPDATE regions.
Along with using a firsptrivate mapping for the array base pointers
in OACC_DATA, OACC_PARALLEL and OACC_KERNELS regions.
* Make the data mapping errors emitted by the c and c++ front ends
more consistent with openacc by reporting data mapping errors, not
omp-specific map errors.
* Add some light checking for duplicate reference mappings in c++. The
c++ FE still fails to detect duplicate component refs, but that's not
working in openacc at the moment, anyway.
Jakub, the latter issue also affects openmp. I've added a simple openmp
test case, but it could probably be more extensive. Can you add more
test coverage or tell me what should be included?
Is this patch ok for trunk?
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