From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20645 invoked by alias); 30 Dec 2013 23:43:42 -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 20616 invoked by uid 48); 30 Dec 2013 23:43:37 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/59644] [4.9 Regression] r206243 miscompiles Linux kernel Date: Mon, 30 Dec 2013 23:43:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub 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: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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/msg02463.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59644 --- Comment #1 from Jakub Jelinek --- Weird, I thought the kernel is compiled even with -mno-sse, so there shouldn't be AVX used and thus no need for realignment anywhere. What arch is that? i?86 or x86_64? Can you bisect which *.o file matters for this, and attach the preprocessed source plus command line options? Perhaps start with comparison of *.o files between r206242 and r206243? I'd be really surprised if it on the kernel made a difference on many source files.