From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26509 invoked by alias); 3 Dec 2013 16:42:48 -0000 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 Received: (qmail 26212 invoked by uid 48); 3 Dec 2013 16:42:44 -0000 From: "sje at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/59371] [4.8/4.9 Regression] Performance regression in GCC 4.8 and later versions. Date: Tue, 03 Dec 2013 16:42:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: sje at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2013-12/txt/msg00203.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59371 --- Comment #2 from Steve Ellcey --- Created attachment 31365 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31365&action=edit runnnable performance test case Here is a runnable test case. You may need to increase the loop counts depending on the speed of your machine. On the MIPS system I used a 4.7.3 GCC took 36.127 seconds and a 4.8.1 GCC took 38.435 seconds (Little endian, -O2, static linking).