From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16493 invoked by alias); 15 Jul 2011 03:02:30 -0000 Received: (qmail 16483 invoked by uid 22791); 15 Jul 2011 03:02:29 -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; Fri, 15 Jul 2011 03:02:15 +0000 From: "eggert at gnu dot org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/43772] Errant -Wlogical-op warning when testing limits X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: eggert at gnu dot org 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: 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: Fri, 15 Jul 2011 03:02:00 -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/msg01208.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43772 --- Comment #8 from eggert at gnu dot org 2011-07-15 03:01:42 UTC --- The problem persists in GCC 4.6.1 (x86-64): $ cat >t.c long long emacs_lseek (int fd, long long offset, int whence) { return -1-9223372036854775807LL <= offset && offset <= 9223372036854775807LL; } $ gcc -S -Wlogical-op t.c t.c: In function 'emacs_lseek': t.c:4:3: warning: logical 'and' of mutually exclusive tests is always false [-Wlogical-op]