On Fri, Oct 23, 2015 at 03:38:31PM +0200, Thomas Schwinge wrote:
> Hi!
>
> On Fri, 23 Oct 2015 12:48:23 +0200, I wrote:
> > On Fri, 23 Oct 2015 10:07:49 +0200, I wrote:
> > > On Mon, 19 Oct 2015 17:54:46 +0200, I wrote:
> > > > [...] Jakub's big "Merge from
> > > > gomp-4_1-branch to trunk",
> > > > <http://news.gmane.org/find-root.php?message_id=%3C20151013191214.GL478%40tucnak.redhat.com%3E>.
> > > > Instead of attempting to merge that one in one go -- that is, to avoid
> > > > having to deal with a ton of merge conflicts at once, and to allow for
> > > > easier understanding of individual changes/regressions -- in the
> > > > following I'll gradually merge individual "blocks" of all the
> > > > gomp-4_1-branch changes into gomp-4_0-branch.
>
> Amongst other things, the last batch includes support for struct elements
> in OpenMP "map", "to", "from" clauses. Again, I have not yet assessed to
> which extent this will be useful to support related (future) OpenACC
> functionality.
I bet that the OpenACC standard would need to say something about those
before you can start using them.
That said, I think more interesting to OpenACC might be the
firstprivatization of scalars on the target region (so that instead of
mapping the arguments that are newly mapped and only copied from the host to
device, you can use a cheaper firstprivatization). If OpenACC requires all
user vars to be mapped, you could still consider that e.g. for artificial
variables created by the compiler.
Jakub
