From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10311 invoked by alias); 17 Aug 2009 13:35:09 -0000 Received: (qmail 10300 invoked by uid 22791); 17 Aug 2009 13:35:09 -0000 X-SWARE-Spam-Status: No, hits=-2.5 required=5.0 tests=AWL,BAYES_00,SPF_PASS X-Spam-Check-By: sourceware.org Received: from ey-out-1920.google.com (HELO ey-out-1920.google.com) (74.125.78.150) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 17 Aug 2009 13:35:01 +0000 Received: by ey-out-1920.google.com with SMTP id 13so610884eye.14 for ; Mon, 17 Aug 2009 06:34:58 -0700 (PDT) Received: by 10.210.115.15 with SMTP id n15mr3301727ebc.2.1250516098473; Mon, 17 Aug 2009 06:34:58 -0700 (PDT) Received: from yakj.usersys.redhat.com (nat-pool-brq.redhat.com [62.40.79.66]) by mx.google.com with ESMTPS id 5sm13116077eyf.28.2009.08.17.06.34.57 (version=TLSv1/SSLv3 cipher=RC4-MD5); Mon, 17 Aug 2009 06:34:58 -0700 (PDT) Message-ID: <4A895C7F.5040003@gnu.org> Date: Mon, 17 Aug 2009 16:14:00 -0000 From: Paolo Bonzini User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Lightning/1.0pre Thunderbird/3.0b3 MIME-Version: 1.0 To: ami_stuff CC: gcc@gcc.gnu.org Subject: Re: "-fno-unswitch-loops" option have no effect? References: <5dd91bc1.7ff0289a.4a88a6a0.1e15f@o2.pl> <84fc9c000908170438t787f3e75w15c44dd8e9080a2d@mail.gmail.com> <171913d8.edfa43f.4a894dda.88a2c@o2.pl> <4A895B1A.1010501@gnu.org> <30c6dc7a.7a8af09d.4a895c36.c1c89@o2.pl> In-Reply-To: <30c6dc7a.7a8af09d.4a895c36.c1c89@o2.pl> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org X-SW-Source: 2009-08/txt/msg00291.txt.bz2 On 08/17/2009 03:33 PM, ami_stuff wrote: > -m68060 -O3 -fno-unswitch-loops > > and > > -m68060 -O2 -finline-functions -fgcse-after-reload -ftree-vectorize -fpredictive-commoning Some heuristics are tuned differently for -O2 and -O3. The only way to know is to look at the dumps. Paolo