From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30874 invoked by alias); 24 Jul 2003 18:14:38 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 30854 invoked by uid 48); 24 Jul 2003 18:14:38 -0000 Date: Thu, 24 Jul 2003 18:14:00 -0000 Message-ID: <20030724181438.30853.qmail@sources.redhat.com> From: "pinskia at physics dot uc dot edu" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20030724173442.11663.jashepherd@usa.net> References: <20030724173442.11663.jashepherd@usa.net> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug c/11663] gcc ignores the cast and emits a warning X-Bugzilla-Reason: CC X-SW-Source: 2003-07/txt/msg02908.txt.bz2 List-Id: PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11663 pinskia at physics dot uc dot edu changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Keywords| |diagnostic Resolution| |INVALID Summary|gcc ignores the cast and |gcc ignores the cast and |emits a warning |emits a warning Target Milestone|3.4 |--- ------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-24 18:14 ------- The warning is correct because converting unsigned char to short will always be positive or zero. GCC is keeping the range information for trans_ind, if you want to convert unsigned char to signed short with trans_ind > 127 being negative add a cast to signed char first.