[2/2] OpenACC routine support

[Nathan Sidwell]

On 11/02/15 14:41, Jakub Jelinek wrote:
>
> Does this work even with -O0?  I mean, the assembler is invalid
> for any target other than PTX, so you are relying on aggressively folding
> this away.

Correct.  As thread identification is inherently target-specific, I don't see 
how to do otherwise.

We know _builtin_acc_on_device is folded for a constant arg, and -O2 enables 
dead code elimination such that non-PTX targets (such as the host) don't see 
that assembler.


nathan