From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17736 invoked by alias); 7 Jun 2007 03:16:44 -0000 Received: (qmail 17692 invoked by uid 48); 7 Jun 2007 03:16:31 -0000 Date: Thu, 07 Jun 2007 03:16:00 -0000 Message-ID: <20070607031631.17691.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "hjl at lucon dot org" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2007-06/txt/msg00461.txt.bz2 ------- Comment #30 from hjl at lucon dot org 2007-06-07 03:16 ------- (In reply to comment #26) > Created an attachment (id=13656) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13656&action=view) [edit] > patch preventing reassociation across loop boundaries > Here are SPEC CPU 2K -O2 -ffast-math differences between revision 125281 plus this patch and revision 125027 on Intel64 C2D: (r125281 plus this patch - r125027)/r125027 400.perlbench 0.492611% 401.bzip2 0.613497% 403.gcc 0% 429.mcf -0.666667% 445.gobmk 0% 456.hmmer 0% 458.sjeng 0% 462.libquantum -1.0582% 464.h264ref -0.393701% 471.omnetpp 0% 473.astar 0.869565% 483.xalancbmk 0.528541% Est. SPECint(R)_base2006 0% 410.bwaves 2.7027% 416.gamess -2.27273% 433.milc 0% 434.zeusmp 0% 435.gromacs 0.433369% 436.cactusADM -1.88679% 437.leslie3d 0% 444.namd 0% 447.dealII -2.33463% 450.soplex 0% 453.povray -0.492611% 454.calculix 1.98151% 459.GemsFDTD 0.961538% 465.tonto 1.40845% 470.lbm 0.70922% 481.wrf 9.07238% 482.sphinx3 0% Est. SPECfp(R)_base2006 0.757576% -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183