From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-417385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 4520 invoked by alias); 11 Mar 2013 08:45:25 -0000
Received: (qmail 4382 invoked by uid 48); 11 Mar 2013 08:45:06 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/56522] [4.8 Regression] Bytemark ASSIGNMENT 9% / 11%  slower
Date: Mon, 11 Mar 2013 08:45:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: WAITING
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.8.0
X-Bugzilla-Changed-Fields:
Message-ID: <bug-56522-4-jMAtrpzvLd@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-56522-4@http.gcc.gnu.org/bugzilla/>
References: <bug-56522-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2013-03/txt/msg00827.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56522

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> 2013-03-11 08:45:04 UTC ---
(In reply to comment #13)
> There is almost no difference with reduced test case. Assignment in nbench can
> be tested with:
> ./nbench -cCOM.DAT
> 
> where file COM.DAT has content:
> 
> ALLSTATS=F
> DONUMSORT=F
> DOSTRINGSORT=F
> DOBITFIELD=F
> DOEMF=F
> DOFOUR=F
> DOASSIGN=T
> DOIDEA=F
> DOHUFF=F
> DONNET=F
> DOLU=F
> 
> Which CPU have you tested?

processor       : 7
vendor_id       : GenuineIntel
cpu family      : 6
model           : 30
model name      : Intel(R) Core(TM) CPU            860  @ 2.80GHz
stepping        : 5

note that there were _zero_ assembly differences with/without the patch
apart from using different register numbers and one single switched
bb order.