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Re: [PATCH, OpenACC] Add support for gang local storage allocation in shared memory


On 08/13/2018 09:21 AM, Julian Brown wrote:

> diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-gwv-2.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-gwv-2.c
> new file mode 100644
> index 0000000..2fa708a
> --- /dev/null
> +++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/loop-gwv-2.c
> @@ -0,0 +1,106 @@
> +/* { dg-xfail-run-if "gangprivate failure" { openacc_nvidia_accel_selected } { "-O0" } { "" } } */

As a quick comment, I like the approach that you've taken with this
patch, but the og8 patch only applies the gangprivate attribute in the
c/c++ FE. I'd have to review the notes, but I seem to recall that
excluding that clause in fortran was deliberate. Chung-Lin, do you
recall the rationale behind that?

With that aside, is the above xfail still necessary? It seems to xpass
for me on nvptx. However, I see this regression on the host:

FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/loop-gwv-2.c
-DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1  -O2  execution test

There could be other regressions, but I only tested the new tests
introduced by the patch so far.

Cesar


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