From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28074 invoked by alias); 5 Dec 2008 15:44:06 -0000 Received: (qmail 27389 invoked by alias); 5 Dec 2008 15:42:43 -0000 Date: Fri, 05 Dec 2008 15:44:00 -0000 Message-ID: <20081205154243.27388.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/38405] [4.4 Regression] (silent failure) handling bitfield in ternary In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "bonzini at gnu dot org" 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: 2008-12/txt/msg00512.txt.bz2 ------- Comment #6 from bonzini at gnu dot org 2008-12-05 15:42 ------- Subject: Re: [4.4 Regression] (silent failure) handling bitfield in ternary > Folding statement: D.1241_5 = D.1242_4 != 0; > Folded into: D.1241_5 = (int) D.1242_4; > > which is wrong for > > D.1242; > > because it sign-extends. So it's probably in fold-const.c and latent in 4.3 too... Paolo -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38405