On Fri, Jan 22, 2016 at 02:18:38PM +0100, Bernd Schmidt wrote:
> On 01/22/2016 09:36 AM, Jakub Jelinek wrote:
> >
> >I think it is a bad idea to go against what the user wrote. Warning that
> >some code might not be efficient? Perhaps (if properly guarded with some
> >warning option one can turn off, either on a per-source file or using
> >pragmas even more fine grained). But by default not offloading? That is
> >just wrong.
>
> I'm leaning more towards Thomas' side of the argument. The kernels construct
> is a hint, a "do your best" request to the compiler. If the compiler sees
> that it can't parallelize a loop inside a kernels region, it's probably best
> not to offload it.
What about #pragma oacc parallel? That would never do that?
Jakub
