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From: "hjl dot tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/45685] [4.6 Regression] GCC optimizer for Intel x64 generates inefficient code
Date: Fri, 17 Sep 2010 13:04:00 -0000	[thread overview]
Message-ID: <20100917130412.18315.qmail@sourceware.org> (raw)
In-Reply-To: <bug-45685-19696@http.gcc.gnu.org/bugzilla/>



------- Comment #6 from hjl dot tools at gmail dot com  2010-09-17 13:04 -------
(In reply to comment #4)
> This all happens in IF conversion pass.
> 
> 4.6 regresses in the sense that a branch is emitted instead of cmov for:
> 

This is caused by revision 159106:

http://gcc.gnu.org/ml/gcc-cvs/2010-05/msg00156.html


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |matz at suse dot de
            Summary|GCC optimizer for Intel x64 |[4.6 Regression] GCC
                   |generates inefficient code  |optimizer for Intel x64
                   |                            |generates inefficient code
   Target Milestone|---                         |4.6.0
            Version|4.4.3                       |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45685


  parent reply	other threads:[~2010-09-17 13:04 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-16  1:17 [Bug rtl-optimization/45685] New: " ekuznetsov at divxcorp dot com
2010-09-16  1:19 ` [Bug rtl-optimization/45685] " ekuznetsov at divxcorp dot com
2010-09-16 23:09 ` ekuznetsov at divxcorp dot com
2010-09-17  9:59 ` ubizjak at gmail dot com
2010-09-17 10:03 ` ubizjak at gmail dot com
2010-09-17 13:04 ` hjl dot tools at gmail dot com [this message]
2010-09-17 13:45 ` [Bug rtl-optimization/45685] [4.6 Regression] " matz at gcc dot gnu dot org
     [not found] <bug-45685-4@http.gcc.gnu.org/bugzilla/>
2010-09-29 18:34 ` rguenth at gcc dot gnu.org
2010-11-04 17:41 ` jakub at gcc dot gnu.org
2010-11-24 15:32 ` ebotcazou at gcc dot gnu.org
2010-11-24 15:56 ` jakub at gcc dot gnu.org
2010-11-24 16:10 ` rguenth at gcc dot gnu.org

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