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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/28778] [4.0/4.1/4.2 Regression] alias bug with cast and call clobbered
Date: Mon, 28 Aug 2006 08:43:00 -0000 [thread overview]
Message-ID: <20060828084257.7902.qmail@sourceware.org> (raw)
In-Reply-To: <bug-28778-1447@http.gcc.gnu.org/bugzilla/>
------- Comment #29 from rguenth at gcc dot gnu dot org 2006-08-28 08:42 -------
I completely agree with Dan's analysis. Note that for the patch in comment #20
we can hoist the loop adding all addressable vars to the call clobbering list
out of the loop iterating over all analyzed pointers by only remembering if one
had pt_anything set.
My preferred solution would be to develop the correct fix for 4.3 and
eventually allow backporting that to the release branch(es) and not hold the
release of 4.2 for this bug. In fact, the usual try of adding
"-fno-strict-aliasing" if one faces a subtle bug will fix it, so it's not
harder to detect than a strict aliasing violation by the user.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28778
next prev parent reply other threads:[~2006-08-28 8:43 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-18 21:07 [Bug tree-optimization/28778] New: strict-aliasing bug mrs at apple dot com
2006-08-18 21:11 ` [Bug tree-optimization/28778] " pinskia at gcc dot gnu dot org
2006-08-18 21:12 ` mrs at apple dot com
2006-08-18 21:15 ` pinskia at gcc dot gnu dot org
2006-08-18 21:18 ` [Bug tree-optimization/28778] [4.0/4.1/4.2 Regression] alias bug with cast and call clobbered pinskia at gcc dot gnu dot org
2006-08-19 10:15 ` rguenth at gcc dot gnu dot org
2006-08-19 10:44 ` rguenth at gcc dot gnu dot org
2006-08-19 14:10 ` dberlin at gcc dot gnu dot org
2006-08-19 14:27 ` rguenth at gcc dot gnu dot org
2006-08-20 22:53 ` mmitchel at gcc dot gnu dot org
2006-08-21 1:34 ` dberlin at dberlin dot org
2006-08-21 16:34 ` janis at gcc dot gnu dot org
2006-08-25 19:57 ` drow at gcc dot gnu dot org
2006-08-25 20:51 ` drow at gcc dot gnu dot org
2006-08-25 20:57 ` drow at gcc dot gnu dot org
2006-08-25 22:12 ` drow at gcc dot gnu dot org
2006-08-26 15:15 ` drow at gcc dot gnu dot org
2006-08-26 20:30 ` rguenth at gcc dot gnu dot org
2006-08-26 20:42 ` rguenth at gcc dot gnu dot org
2006-08-26 23:25 ` drow at gcc dot gnu dot org
2006-08-27 4:12 ` dberlin at dberlin dot org
2006-08-27 14:20 ` rguenth at gcc dot gnu dot org
2006-08-27 15:41 ` dberlin at dberlin dot org
2006-08-27 15:50 ` rguenth at gcc dot gnu dot org
2006-08-27 16:00 ` dberlin at dberlin dot org
2006-08-27 17:56 ` drow at gcc dot gnu dot org
2006-08-27 20:25 ` mmitchel at gcc dot gnu dot org
2006-08-27 20:28 ` mmitchel at gcc dot gnu dot org
2006-08-27 20:51 ` dberlin at dberlin dot org
2006-08-27 21:09 ` dberlin at dberlin dot org
2006-08-28 8:43 ` rguenth at gcc dot gnu dot org [this message]
2006-09-09 17:55 ` dberlin at dberlin dot org
2006-09-16 18:09 ` steven at gcc dot gnu dot org
2006-09-16 20:03 ` dberlin at dberlin dot org
2006-09-26 4:44 ` acahalan at gmail dot com
2006-09-26 4:56 ` Andrew Pinski
2006-09-26 4:56 ` pinskia at physics dot uc dot edu
2006-09-26 14:17 ` acahalan at gmail dot com
2006-09-26 14:32 ` pinskia at gcc dot gnu dot org
2006-09-26 15:33 ` acahalan at gmail dot com
2006-09-26 15:47 ` dberlin at dberlin dot org
2006-09-26 15:49 ` pinskia at gcc dot gnu dot org
2006-09-26 15:57 ` pcarlini at suse dot de
2006-09-27 2:12 ` dberlin at dberlin dot org
2006-10-13 17:50 ` dberlin at gcc dot gnu dot org
2006-10-19 23:06 ` dberlin at gcc dot gnu dot org
2006-10-19 23:07 ` dberlin at gcc dot gnu dot org
2006-10-20 8:25 ` [Bug tree-optimization/28778] [4.0/4.1 " rguenth at gcc dot gnu dot org
2006-11-05 22:17 ` chuck at vertica dot com
2006-11-05 22:26 ` drow at gcc dot gnu dot org
2006-11-05 22:26 ` pinskia at gcc dot gnu dot org
2006-11-05 23:39 ` chuck at vertica dot com
2007-01-25 15:51 ` gdr at gcc dot gnu dot org
2007-02-07 22:52 ` pinskia at gcc dot gnu dot org
2007-02-14 9:09 ` mmitchel at gcc dot gnu dot org
2008-07-04 15:51 ` [Bug tree-optimization/28778] [4.1 " jsm28 at gcc dot gnu dot org
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