From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20002 invoked by alias); 9 Dec 2004 17:45:10 -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 19951 invoked by uid 48); 9 Dec 2004 17:45:05 -0000 Date: Thu, 09 Dec 2004 17:45:00 -0000 Message-ID: <20041209174504.19950.qmail@sourceware.org> From: "pinskia at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20041209173912.18908.falk@debian.org> References: <20041209173912.18908.falk@debian.org> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug middle-end/18908] Missed folding opportunities with bools X-Bugzilla-Reason: CC X-SW-Source: 2004-12/txt/msg01363.txt.bz2 List-Id: ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-09 17:45 ------- Confirmed here is what we get on ppc: _f1: lwz r3,0(r3) rlwinm r3,r3,0,31,31 <-- not useful blr .align 2 .globl _f2 _f2: lwz r0,0(r3) addic r2,r0,-1 subfe r3,r2,r0 <-- previous two instructions not useful (comes from _Bool !=0 is not converted to _Bool, I think there is another bug about this) blr .align 2 .globl _f3 _f3: lwz r0,0(r3) xori r0,r0,1 addic r9,r0,-1 subfe r2,r9,r0 stw r2,0(r3) blr .align 2 .globl _f4 _f4: lwz r0,0(r3) nor r0,r0,r0 addic r9,r0,-1 subfe r2,r9,r0 stw r2,0(r3) blr -- What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2004-12-09 17:45:04 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18908