From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6378 invoked by alias); 28 Nov 2010 16:12:58 -0000 Received: (qmail 6368 invoked by uid 22791); 28 Nov 2010 16:12:56 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sun, 28 Nov 2010 16:12:50 +0000 From: "geomatsi at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/46693] incorrect code generation with -O2 optimization enabled X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: major X-Bugzilla-Who: geomatsi at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Sun, 28 Nov 2010 16:25:00 -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 X-SW-Source: 2010-11/txt/msg03450.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46693 --- Comment #5 from Sergey Matyukevich 2010-11-28 16:12:47 UTC --- I am using an arm gcc cross-toolchain created with OpenEmbedded. Toolchain version and its dumpspecs are available in attachements. Wrong code for attached simple testcase is generated when I use -O2 optimization option. When optimization options are not used or when -O0 is in use then code is generated correctly. Running testcase is straightforward: compile an example with -O2 and without it, then run both examples (either on a suitable arm machine or under qemu) and get two different outputs (OK and WRONG) for two binaries.