From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4159 invoked by alias); 2 Jun 2004 01:58:34 -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 4128 invoked by uid 48); 2 Jun 2004 01:58:33 -0000 Date: Wed, 02 Jun 2004 01:58:00 -0000 Message-ID: <20040602015833.4126.qmail@sourceware.org> From: "pinskia at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20040523171848.15617.kpfleming@backtobasicsmgmt.com> References: <20040523171848.15617.kpfleming@backtobasicsmgmt.com> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug target/15617] building groff-1.19.1 with "-Os -march=pentium4" causes sig 11 X-Bugzilla-Reason: CC X-SW-Source: 2004-06/txt/msg00149.txt.bz2 List-Id: ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-02 01:58 ------- This looks like a case where the stack pointer is misaligned, movaps requires 16byte (128bit) aligned addresses So this caused by -Os implying -mpreferred-stack-boundary=32 which is wrong for SSE. Maybe the fix would be to imply -mpreferred-stack-boundary=128 if -msse (or is it -msse2) is turned on with -Os, this also causes var_arg25.c (I think) to fail at -Os. Jan I added you as CC to find your opinion on my suggestion. I think a huge amount of people will run into this if they used -Os without knowning what is going on. -- What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu dot | |org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15617