From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27233 invoked by alias); 3 Dec 2009 00:32:45 -0000 Received: (qmail 27209 invoked by uid 48); 3 Dec 2009 00:32:33 -0000 Date: Thu, 03 Dec 2009 00:32:00 -0000 Message-ID: <20091203003233.27208.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug rtl-optimization/27469] zero extension not eliminated In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "rth at gcc dot 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: 2009-12/txt/msg00220.txt.bz2 ------- Comment #3 from rth at gcc dot gnu dot org 2009-12-03 00:32 ------- Gcc 4.5 has regressed this even further: extwl $16,2,$1 xor $1,$16,$16 addl $31,$16,$16 << signextend zapnot $16,15,$1 << zeroextend of signextend srl $1,8,$1 Neither extension is needed, of course. -- rth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed|2006-05-07 18:59:35 |2009-12-03 00:32:32 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27469