From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12196 invoked by alias); 10 Jan 2006 20:36:21 -0000 Received: (qmail 12180 invoked by uid 48); 10 Jan 2006 20:36:19 -0000 Date: Tue, 10 Jan 2006 20:36:00 -0000 Message-ID: <20060110203619.12179.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/23451] [3.4/4.0/4.1/4.2 regression] Redundant reloading from stack frame In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "steven at gcc dot gnu dot org" 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 X-SW-Source: 2006-01/txt/msg00982.txt.bz2 List-Id: ------- Comment #3 from steven at gcc dot gnu dot org 2006-01-10 20:36 ------- GCC 4.2 (trunk) produces this kind of redundant loads: ... movl -20(%ebp), %eax testl %eax, %eax je .L10 movl -20(%ebp), %eax movl %eax, (%esp) call strlen ... And so does GCC 3.3-hammer_branch: ... movl -16(%ebp), %ecx xorl %ebx, %ebx testl %ecx, %ecx je .L8 movl -16(%ebp), %eax movl %eax, (%esp) call strlen ... -- steven at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2006-01-10 20:36:18 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23451