From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13577 invoked by alias); 12 Oct 2008 20:52:48 -0000 Received: (qmail 13191 invoked by alias); 12 Oct 2008 20:51:28 -0000 Date: Sun, 12 Oct 2008 20:52:00 -0000 Message-ID: <20081012205128.13190.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/37795] if-combine doesn't optimize != after >= test In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "rguenther at suse dot de" 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: 2008-10/txt/msg00812.txt.bz2 ------- Comment #6 from rguenther at suse dot de 2008-10-12 20:51 ------- Subject: Re: if-combine doesn't optimize != after >= test On Sun, 12 Oct 2008, pinskia at gmail dot com wrote: > ------- Comment #5 from pinskia at gmail dot com 2008-10-12 20:47 ------- > Subject: Re: if-combine doesn't optimize != after >= test > > On Sun, Oct 12, 2008 at 1:40 PM, rguenther at suse dot de > wrote: > > No. ifcombine only combines on the CFG, in PR28685 we are dealing > > with a CFG-less opportunity. > > Well it depends really. As on some targets it has a CFG based ||/&& > depending on BRANCH_COST. In that case we already optimize it. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37795