From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17516 invoked by alias); 30 Jul 2011 18:13:36 -0000 Received: (qmail 17505 invoked by uid 22791); 30 Jul 2011 18:13:35 -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; Sat, 30 Jul 2011 18:13:20 +0000 From: "marc.glisse at normalesup dot org" To: gcc-bugs@gcc.gnu.org Subject: [Bug other/49914] New: call to abs(long long) in gcc/fold-const.c X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: other X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: marc.glisse at normalesup dot org 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: Sat, 30 Jul 2011 18:13:00 -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: 2011-07/txt/msg02632.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49914 Summary: call to abs(long long) in gcc/fold-const.c Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: other AssignedTo: unassigned@gcc.gnu.org ReportedBy: marc.glisse@normalesup.org Hello, in gcc/fold-const.c (currently line 7051), in function fold_plusminus_mult_expr: if (exact_log2 (abs (int11)) > 0 && int01 % int11 == 0 where int11 is a HOST_WIDE_INT. Is this call to abs safe? A few lines above, abs is computed as x>=0?x:-x. (don't know how to classify this, but it causes a build failure for me with a C++98 compiler (ambiguous))