From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29082 invoked by alias); 6 Sep 2014 11:40:16 -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 29050 invoked by uid 48); 6 Sep 2014 11:40:10 -0000 From: "mikpelinux at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/63189] [4.8 Regression] Incorrect results from trivial loop when optimized with O3 or O2+tree vectorization Date: Sat, 06 Sep 2014 11:40:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 4.8.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mikpelinux at gmail dot com X-Bugzilla-Status: NEW 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: cc 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: 2014-09/txt/msg01187.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63189 Mikael Pettersson changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mikpelinux at gmail dot com --- Comment #3 from Mikael Pettersson --- I can reproduce the wrong-code with current 4.8, but not with 4.7.4 or 4.6.4 (all unmodified FSF versions). The bug in 4.8 gets fixed by backporting r202663, which also fixes PR60196. The three test cases are essentially identical.