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Re: [RFC] Add middle end hook for stack red zone size
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Jiangning Liu <jiangning dot liu at arm dot com>
- Cc: "'Joern Rennecke'" <amylaar at spamcop dot net>, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org, vmakarov at redhat dot com, dje dot gcc at gmail dot com, Richard Henderson <rth at redhat dot com>, Ramana Radhakrishnan <Ramana dot Radhakrishnan at arm dot com>, "'Ramana Radhakrishnan'" <ramana dot radhakrishnan at linaro dot org>
- Date: Mon, 1 Aug 2011 11:11:51 +0200
- Subject: Re: [RFC] Add middle end hook for stack red zone size
- References: <4e255312.0a852b0a.528d.6933SMTPIN_ADDED@mx.google.com> <CACUk7=WsaUN+TUw7rb8-o1EukoaCMrAh8bFJM6832LtRmfkofg@mail.gmail.com> <001e01cc4b33$6d3818f0$47a84ad0$@liu@arm.com> <20110725223319.petrcv01csccs44s-nzlynne@webmail.spamcop.net> <000001cc4ffd$48680ac0$d9382040$@liu@arm.com>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Mon, Aug 01, 2011 at 11:44:04AM +0800, Jiangning Liu wrote:
> It's quite necessary to solve the general problem in middle-end rather than in back-end.
That's what we disagree on. All back-ends but ARM are able to handle it
right, why can't ARM too? The ABI rules for stack handling in the epilogues
are simply too diverse and complex to be handled easily in the scheduler.
Jakub