From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13487 invoked by alias); 5 Dec 2011 20:38:23 -0000 Received: (qmail 13477 invoked by uid 22791); 5 Dec 2011 20:38:22 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_CP 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; Mon, 05 Dec 2011 20:38:10 +0000 From: "mans at mansr dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/32667] builtin operator= generates memcpy with overlapping memory regions Date: Mon, 05 Dec 2011 20:38:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: mans at mansr 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-Changed-Fields: CC 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 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: 2011-12/txt/msg00473.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32667 Mans Rullgard changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mans at mansr dot com --- Comment #7 from Mans Rullgard 2011-12-05 20:37:18 UTC --- Note that the test case in comment #6 does not trigger the problem on x86 where the copying is inlined. It does trigger on ARM and other targets where this assignment results in a memcpy() call. All current stable releases show the bug. I did not test with trunk.