From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5909 invoked by alias); 28 Nov 2004 00:34:21 -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 5899 invoked by uid 48); 28 Nov 2004 00:34:19 -0000 Date: Sun, 28 Nov 2004 00:34:00 -0000 Message-ID: <20041128003419.5898.qmail@sourceware.org> From: "steven at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20041124222749.18665.skunk@iskunk.org> References: <20041124222749.18665.skunk@iskunk.org> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug target/18665] [3.4/4.0 Regression] -ftrapv borks up simple integer arithmetic X-Bugzilla-Reason: CC X-SW-Source: 2004-11/txt/msg03411.txt.bz2 List-Id: ------- Additional Comments From steven at gcc dot gnu dot org 2004-11-28 00:34 ------- Here's the difference between what gcc 3.3.3 produces and what gcc 4.0.0 manages to make of it (first 3.3.3, second 4.0.0): 16,18c16,20 < movl -8(%rbp), %esi < movl -4(%rbp), %edi < call __subvsi3 --- > movl -4(%rbp), %eax > movslq %eax,%rdi > movl -8(%rbp), %eax > movslq %eax,%rsi > call __subvdi3 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18665