On Thu, Oct 22, 2015 at 02:06:54PM -0400, Nathan Sidwell wrote:
> On 10/22/15 10:26, Richard Biener wrote:
> >On Thu, Oct 22, 2015 at 4:01 PM, Nathan Sidwell <nat...@acm.org> wrote:
> >>On 10/22/15 04:07, Richard Biener wrote:
> >>
> >>>Yeah, please make them either end or start a BB so we have to check
> >>>at most a single stmt. ECF_RETURNS_TWICE should achieve that,
> >>>it also makes it a code motion barrier.
> >>
> >>
> >>Just so I'm clear, you're not saying that RETURNS_TWICE will stop the call
> >>being duplicated though?
> >
> >It will in practice. RETURNS_TWICE will get you an abnormal edge from
> >entry (I think)
>
> Won't that interfere with the OMP machinery, which expects correctly nested
> loops? (no in-to or out-of loop jumps)
I bet it will, the region with the abnormal edges is no longer SESE.
Jakub
