From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26830 invoked by alias); 30 Sep 2013 15:52:37 -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 26768 invoked by uid 48); 30 Sep 2013 15:52:35 -0000 From: "law at redhat dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/58553] New fail in PASS->FAIL: gcc.c-torture/execute/memcpy-2.c execution on arm and aarch64 Date: Mon, 30 Sep 2013 15:52:00 -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: law at redhat dot com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth 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: 2013-09/txt/msg02073.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58553 --- Comment #8 from Jeffrey A. Law --- Yes, threading is rotating the loop in "interesting" ways -- I was going to look at that independently of the correctness issue. One of the things I've noticed as I've been laying down some infrastructure for the FSA optimization is much of the work Zdenek did to prevent threading through loop headers and such isn't working as well as we'd like.