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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/19131] alloca returning unnecessarily aligned pointer and uses too much memory
Date: Thu, 23 Dec 2004 22:27:00 -0000 [thread overview]
Message-ID: <20041223222723.18192.qmail@sourceware.org> (raw)
In-Reply-To: <20041222143844.19131.rguenth@tat.physik.uni-tuebingen.de>
------- Additional Comments From hubicka at ucw dot cz 2004-12-23 22:27 -------
Subject: Re: alloca returning unnecessarily aligned pointer and uses too much memory
>
> ------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de 2004-12-23 22:23 -------
> Subject: Re: alloca returning unnecessarily aligned pointer
> and uses too much memory
>
> pinskia at gcc dot gnu dot org wrote:
> > ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-22 15:06 -------
> > The reason you cannot find anything in the C standard is because this is ABI thing so this is invalid
>
> Where is the ABI specified? Is it the "System V ABI, Intel386
> Architecture Processor Supplement" document I found at
> http://www.caldera.com/developers/devspecs/abi386-4.pdf?
> This one talks about word-alignment of the stack, not 16 byte alignment.
We keep the stack 16 byte aligned as an extension to support SSE....
Honza
>
> > We need to keep the stack aligned sorry.
>
>
> --
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19131
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19131
prev parent reply other threads:[~2004-12-23 22:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-22 14:39 [Bug tree-optimization/19131] New: " rguenth at tat dot physik dot uni-tuebingen dot de
2004-12-22 15:06 ` [Bug target/19131] " pinskia at gcc dot gnu dot org
2004-12-22 18:16 ` rguenth at tat dot physik dot uni-tuebingen dot de
2004-12-23 22:23 ` rguenth at tat dot physik dot uni-tuebingen dot de
2004-12-23 22:27 ` Jan Hubicka
2004-12-23 22:27 ` hubicka at ucw dot cz [this message]
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