From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16309 invoked by alias); 22 Jan 2008 12:38:52 -0000 Received: (qmail 16214 invoked by uid 48); 22 Jan 2008 12:38:07 -0000 Date: Tue, 22 Jan 2008 13:24:00 -0000 Message-ID: <20080122123807.16213.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "rguenth at gcc dot gnu 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: 2008-01/txt/msg02535.txt.bz2 ------- Comment #28 from rguenth at gcc dot gnu dot org 2008-01-22 12:38 ------- This is an alias partitioning problem, with --param max-aliased-vops=10000 I see the sequence optimized by FRE. Or, with the alias-oracle patch for FRE --param max-fields-for-field-sensitive=1 does the job as well. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |alias http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928