From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20508 invoked by alias); 7 Jul 2003 18:54:33 -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 20496 invoked by alias); 7 Jul 2003 18:54:33 -0000 Date: Mon, 07 Jul 2003 18:54:00 -0000 Message-ID: <20030707185433.20495.qmail@sources.redhat.com> From: "cvs-commit at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20030602050447.11059.jelenz@students.wisc.edu> References: <20030602050447.11059.jelenz@students.wisc.edu> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug optimization/11059] [3.3/3.4 regression] empty union optimization ice X-Bugzilla-Reason: CC X-SW-Source: 2003-07/txt/msg00728.txt.bz2 List-Id: PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11059 ------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-07-07 18:54 ------- Subject: Bug 11059 CVSROOT: /cvs/gcc Module name: gcc Changes by: sayle@gcc.gnu.org 2003-07-07 18:54:28 Modified files: gcc : ChangeLog expr.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/opt: emptyunion.C Log message: PR optimization/11059 * expr.c (can_store_by_pieces): Return true if length is zero. (store_by_pieces): If length is zero and endp is two, abort, othwerise, if length is zero and endp is not two, return "to". (clear_by_pieces): Do nothing if length is zero. (clear_storage): Do nothing if length is zero. (store_constructor): Simplify code when size is zero, or the target has already been cleared. This avoids emitting a blockage instruction when initializing empty structures. * g++.dg/opt/emptyunion.C: New testcase. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.380&r2=2.381 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&r1=1.565&r2=1.566 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.2846&r2=1.2847 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/opt/emptyunion.C.diff?cvsroot=gcc&r1=NONE&r2=1.1