From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23442 invoked by alias); 30 Nov 2008 16:27:22 -0000 Received: (qmail 23091 invoked by uid 48); 30 Nov 2008 16:26:02 -0000 Date: Sun, 30 Nov 2008 16:27:00 -0000 Message-ID: <20081130162602.23090.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/38306] [4.4 Regression] 15% slowdown of computational kernel In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "jv244 at cam dot ac dot uk" 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: 2008-11/txt/msg02653.txt.bz2 ------- Comment #5 from jv244 at cam dot ac dot uk 2008-11-30 16:26 ------- (In reply to comment #4) > 4.3: > -O3 -march=native -funroll-loops -ffast-math ==> 4.376 > -O3 -march=native -funroll-loops -ffast-math -fschedule-insns ==> 3.372 strangely: http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Optimize-Options.html#Optimize-Options suggests -fschedule-insns is enabled by default at -O3 ? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38306