From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17800 invoked by alias); 23 Dec 2004 22:27:15 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 17565 invoked from network); 23 Dec 2004 22:26:55 -0000 Received: from unknown (HELO atrey.karlin.mff.cuni.cz) (195.113.31.123) by sourceware.org with SMTP; 23 Dec 2004 22:26:55 -0000 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 4018) id 606444B40CB; Thu, 23 Dec 2004 23:26:54 +0100 (CET) Date: Thu, 23 Dec 2004 22:27:00 -0000 From: Jan Hubicka To: rguenth at tat dot physik dot uni-tuebingen dot de Cc: gcc-bugs@gcc.gnu.org Subject: Re: [Bug target/19131] alloca returning unnecessarily aligned pointer and uses too much memory Message-ID: <20041223222654.GC31056@atrey.karlin.mff.cuni.cz> References: <20041222143844.19131.rguenth@tat.physik.uni-tuebingen.de> <20041223222320.15046.qmail@sourceware.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041223222320.15046.qmail@sourceware.org> User-Agent: Mutt/1.5.6i X-SW-Source: 2004-12/txt/msg03397.txt.bz2 List-Id: > > ------- 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