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From: "bonzini at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/39794] [4.4/4.5 Regression] Miscompile with -O2 -funroll-loops
Date: Mon, 20 Apr 2009 15:48:00 -0000 [thread overview]
Message-ID: <20090420154813.4738.qmail@sourceware.org> (raw)
In-Reply-To: <bug-39794-13999@http.gcc.gnu.org/bugzilla/>
------- Comment #4 from bonzini at gnu dot org 2009-04-20 15:48 -------
> Maybe a stupid question, but shouldn't this
> canon_true_dependence call receive canonicalized MEMs from 'base' and
> 'store_info->cse_base'?
I think so. The only way that DSE can see that something changed, is by having
cselib_expand_value_rtx return a different expanded expression.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bonzini at gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39794
next prev parent reply other threads:[~2009-04-20 15:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-17 9:58 [Bug middle-end/39794] New: " abel at gcc dot gnu dot org
2009-04-17 10:27 ` [Bug middle-end/39794] [4.4/4.5 Regression] " amonakov at gcc dot gnu dot org
2009-04-17 10:35 ` rguenth at gcc dot gnu dot org
2009-04-17 11:43 ` jakub at gcc dot gnu dot org
2009-04-17 12:19 ` rguenth at gcc dot gnu dot org
2009-04-17 21:55 ` amonakov at gcc dot gnu dot org
2009-04-17 22:06 ` rguenth at gcc dot gnu dot org
2009-04-20 15:48 ` bonzini at gnu dot org [this message]
2009-04-20 17:46 ` jakub at gcc dot gnu dot org
2009-04-21 16:02 ` jakub at gcc dot gnu dot org
2009-04-21 17:23 ` jakub at gcc dot gnu dot org
2009-04-22 13:41 ` rguenth at gcc dot gnu dot org
2009-04-22 16:55 ` alexey dot zaytsev at gmail dot com
2009-04-22 16:58 ` alexey dot zaytsev at gmail dot com
2009-04-23 14:37 ` bonzini at gnu dot org
2009-04-24 6:58 ` [Bug rtl-optimization/39794] " jakub at gcc dot gnu dot org
2009-04-27 11:55 ` jakub at gcc dot gnu dot org
2009-04-27 12:49 ` jakub at gcc dot gnu dot org
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