From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15646 invoked by alias); 18 Apr 2011 13:41:35 -0000 Received: (qmail 15636 invoked by uid 22791); 18 Apr 2011 13:41:34 -0000 X-SWARE-Spam-Status: No, hits=-2.9 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; Mon, 18 Apr 2011 13:40:41 +0000 From: "franz.sirl-kernel at lauterbach dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/48666] New: [4.5.2/4.6 regression] -Warray-bounds doesn't trigger anymore for simple case X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: franz.sirl-kernel at lauterbach 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: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Mon, 18 Apr 2011 13:41:00 -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: 2011-04/txt/msg01871.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48666 Summary: [4.5.2/4.6 regression] -Warray-bounds doesn't trigger anymore for simple case Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned@gcc.gnu.org ReportedBy: franz.sirl-kernel@lauterbach.com Created attachment 24031 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24031 testcase A simple testcase like typedef union { int val32; int val32Tab2[4]; int val32Tab3[3]; long long val64; } SrcVal; void f(SrcVal *x) { x->val32Tab3[4] = 42; } doesn't warn anymore when compiled with -O2 -Warray-bounds. Tested OK (x86_64): gcc-4.3 (SLES11): gcc (SUSE Linux) 4.3.4 [gcc-4_3-branch revision 152973] gcc-4.5.1 (FC14): gcc (GCC) 4.5.1 20100924 (Red Hat 4.5.1-4) Tested NOT OK (x86_64): gcc-4.5.2 (OBS): gcc-4.5 (SUSE Linux) 4.5.2 20110302 [gcc-4_5-branch revision 170616] gcc-4.6.0 (OBS): gcc-4.6 (SUSE Linux) 4.6.0 20110314 [gcc-4_6-branch revision 170941] gcc-4.6.0 (OBS): gcc-4.6 (SUSE Linux) 4.6.0 20110415 [gcc-4_6-branch revision 172496]