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Re: [OpenACC 1/11] UNIQUE internal function
- From: Richard Biener <richard dot guenther at gmail dot com>
- To: Nathan Sidwell <nathan at acm dot org>
- Cc: Jakub Jelinek <jakub at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Bernd Schmidt <bschmidt at redhat dot com>, Jason Merrill <jason at redhat dot com>, "Joseph S. Myers" <joseph at codesourcery dot com>
- Date: Fri, 23 Oct 2015 11:29:22 +0200
- Subject: Re: [OpenACC 1/11] UNIQUE internal function
- Authentication-results: sourceware.org; auth=none
- References: <5627DD78 dot 9040302 at acm dot org> <5627E0DF dot 9050507 at acm dot org> <20151022080444 dot GC478 at tucnak dot redhat dot com> <CAFiYyc09Kkx3uGPJWSYkuyRPEMLjY5Uk8r=72jp6L7kj84O9Dw at mail dot gmail dot com> <5628EC53 dot 9090006 at acm dot org> <CAFiYyc3f1zdjZo7WyMHPXZkxNYbfVXa+2N8wMuB4fxKxtEiwDA at mail dot gmail dot com> <562925BE dot 805 at acm dot org>
On Thu, Oct 22, 2015 at 8:06 PM, Nathan Sidwell <nathan@acm.org> wrote:
> On 10/22/15 10:26, Richard Biener wrote:
>>
>> On Thu, Oct 22, 2015 at 4:01 PM, Nathan Sidwell <nathan@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)
Probably yes.
> nathan