public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "dirtyepic at gentoo dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/40838] gcc shouldn't assume that the stack is aligned
Date: Thu, 29 Apr 2010 22:58:00 -0000 [thread overview]
Message-ID: <20100429225835.16964.qmail@sourceware.org> (raw)
In-Reply-To: <bug-40838-1600@http.gcc.gnu.org/bugzilla/>
------- Comment #75 from dirtyepic at gentoo dot org 2010-04-29 22:58 -------
if some libraries, (zlib and fontconfig i've had personal experience with, i've
also heard libgcrypt) are compiled with -ftree-vectorize (ie. -O3) on x86
systems supporting SSE2, it causes segfaults in certain packages, usually
mozilla-based or wine, when SSE2 instructions requiring 16bit alignment are
used on unaligned data. nothing is being built with -mpreferred-stack-boundary
in these cases. this is PR41156, https://bugzilla.redhat.com/489290,
https://bugs.gentoo.org/270120. i'm not convinced this is GCC's problem. it
usually gets traced back as far as something in the mozilla codebase
misaligning the stack at which point everyone seems to give up. i've yet to
see an actual testcase, though I've encountered it several times in the wild.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
next prev parent reply other threads:[~2010-04-29 22:58 UTC|newest]
Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-23 12:53 [Bug rtl-optimization/40838] New: " mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 12:56 ` [Bug rtl-optimization/40838] " jakub at gcc dot gnu dot org
2009-07-23 13:14 ` jakub at gcc dot gnu dot org
2009-07-23 13:15 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 13:19 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 13:24 ` jakub at gcc dot gnu dot org
2009-07-23 13:43 ` hjl dot tools at gmail dot com
2009-07-23 13:49 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-23 13:54 ` jakub at gcc dot gnu dot org
2009-07-23 13:56 ` hjl dot tools at gmail dot com
2009-07-23 14:36 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 1:00 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 1:04 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 7:12 ` jakub at gcc dot gnu dot org
2009-07-31 13:54 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 14:27 ` hjl dot tools at gmail dot com
2009-07-31 15:22 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 15:31 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-07-31 15:52 ` hjl dot tools at gmail dot com
2009-07-31 16:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-06 16:48 ` hjl dot tools at gmail dot com
2009-08-06 21:05 ` hjl dot tools at gmail dot com
2009-08-06 21:43 ` hjl dot tools at gmail dot com
2009-08-08 17:31 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-16 17:37 ` hjl dot tools at gmail dot com
2009-08-18 4:43 ` hjl dot tools at gmail dot com
2009-08-18 4:50 ` hjl dot tools at gmail dot com
2009-08-18 11:28 ` mahatma at eu dot by
2009-08-18 14:01 ` hjl dot tools at gmail dot com
2009-08-19 19:08 ` mahatma at eu dot by
2009-08-23 19:28 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-08-27 19:18 ` mahatma at eu dot by
2009-09-13 13:58 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-13 13:59 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-13 14:07 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-19 21:37 ` hjl dot tools at gmail dot com
2009-09-19 21:38 ` hjl dot tools at gmail dot com
2009-09-19 21:39 ` hjl dot tools at gmail dot com
2009-09-19 21:40 ` hjl dot tools at gmail dot com
2009-09-20 6:31 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-20 18:43 ` hjl dot tools at gmail dot com
2009-09-20 18:44 ` hjl dot tools at gmail dot com
2009-09-20 18:45 ` hjl dot tools at gmail dot com
2009-09-23 16:28 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-23 16:34 ` hjl dot tools at gmail dot com
2009-09-23 18:37 ` mahatma at eu dot by
2009-09-25 0:57 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-25 2:31 ` hjl dot tools at gmail dot com
2009-09-26 4:25 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-26 14:06 ` hjl dot tools at gmail dot com
2009-09-26 15:44 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-26 16:15 ` hjl dot tools at gmail dot com
2009-09-26 16:55 ` hjl dot tools at gmail dot com
2009-09-26 16:58 ` hjl dot tools at gmail dot com
2009-09-27 9:03 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-27 9:07 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-09-27 9:36 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-10-15 14:29 ` mahatma at eu dot by
2009-10-15 20:24 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-10-15 20:54 ` hjl dot tools at gmail dot com
2009-10-16 0:56 ` hjl dot tools at gmail dot com
2009-10-16 2:11 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2009-10-16 2:48 ` hjl dot tools at gmail dot com
2009-10-30 14:32 ` hjl at gcc dot gnu dot org
2009-10-30 15:45 ` hjl at gcc dot gnu dot org
2009-10-31 16:47 ` hjl dot tools at gmail dot com
2009-12-26 22:19 ` hjl dot tools at gmail dot com
2010-04-17 14:29 ` t dot artem at mailcity dot com
2010-04-20 7:48 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2010-04-29 2:12 ` t dot artem at mailcity dot com
2010-04-29 6:29 ` ubizjak at gmail dot com
2010-04-29 7:24 ` t dot artem at mailcity dot com
2010-04-29 7:33 ` jakub at gcc dot gnu dot org
2010-04-29 7:51 ` ubizjak at gmail dot com
2010-04-29 8:29 ` t dot artem at mailcity dot com
2010-04-29 22:58 ` dirtyepic at gentoo dot org [this message]
2010-05-12 13:01 ` jcea at hispasec dot com
2010-05-12 13:15 ` jcea at hispasec dot com
2010-08-09 1:56 ` jasmin at revisionfx dot com
2010-08-11 21:26 ` jasmin at revisionfx dot com
2010-08-17 20:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2010-08-17 21:03 ` jasmin at revisionfx dot com
2010-08-17 21:17 ` mikulas at artax dot karlin dot mff dot cuni dot cz
2010-08-24 22:10 ` jasmin at revisionfx dot com
2010-08-25 21:27 ` mikulas at artax dot karlin dot mff dot cuni dot cz
[not found] <bug-40838-4@http.gcc.gnu.org/bugzilla/>
2011-01-18 21:11 ` t.artem at mailcity dot com
2011-01-18 21:18 ` hjl.tools at gmail dot com
2011-03-13 16:56 ` mahatma at eu dot by
2014-02-16 10:01 ` jackie.rosen at hushmail dot com
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100429225835.16964.qmail@sourceware.org \
--to=gcc-bugzilla@gcc.gnu.org \
--cc=gcc-bugs@gcc.gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).