From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28709 invoked by alias); 28 Mar 2003 07:36:01 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 28679 invoked by uid 71); 28 Mar 2003 07:36:00 -0000 Resent-Date: 28 Mar 2003 07:36:00 -0000 Resent-Message-ID: <20030328073600.28678.qmail@sources.redhat.com> Resent-From: gcc-gnats@gcc.gnu.org (GNATS Filer) Resent-Cc: gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org, rth@redhat.com Resent-Reply-To: gcc-gnats@gcc.gnu.org, davidm@hpl.hp.com Received: (qmail 28399 invoked by uid 48); 28 Mar 2003 07:34:27 -0000 Message-Id: <20030328073427.28398.qmail@sources.redhat.com> Date: Fri, 28 Mar 2003 07:36:00 -0000 From: davidm@hpl.hp.com Reply-To: davidm@hpl.hp.com To: gcc-gnats@gcc.gnu.org Cc: rth@redhat.com X-Send-Pr-Version: gnatsweb-2.9.3 (1.1.1.1.2.31) X-GNATS-Notify: rth@redhat.com Subject: optimization/10252: __builtin_constant_p() returns TRUE for non-constant expression X-SW-Source: 2003-03/txt/msg01960.txt.bz2 List-Id: >Number: 10252 >Category: optimization >Synopsis: __builtin_constant_p() returns TRUE for non-constant expression >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: wrong-code >Submitter-Id: net >Arrival-Date: Fri Mar 28 07:36:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: David Mosberger >Release: gcc version 3.4 20030327 (experimental) >Organization: >Environment: IA-64 Linux >Description: The attached test-program demonstrates a case where GCC thinks a non-constant expression is constant. When compiled with -O2, the resulting object file will have an undefined reference to __bad_stuff(). The problem doesn't show with lower optimization levels. >How-To-Repeat: gcc -Wall -c -O2 sem.i nm sem.o |grep bad U __bad_stuff >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="sem.i" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="sem.i" c3RydWN0IHNlbWEgewoJaW50IHNsZWVwZXJzOwp9OwoKdm9pZApmb28gKHN0cnVjdCBzZW1hICog c2VtKQp7CglleHRlcm4gdm9pZCBfX2JhZF9zdHVmZiAodm9pZCk7CgogICAgICAgIGZvciAoOzsp IHsKICAgICAgICAgICAgICAgIGlmIChzZW0pIHsKCQkJaWYgKF9fYnVpbHRpbl9jb25zdGFudF9w KHNlbS0+c2xlZXBlcnMpKQoJCQkJX19iYWRfc3R1ZmYoKTsKICAgICAgICAgICAgICAgICAgICAg ICAgYnJlYWs7CiAgICAgICAgICAgICAgICB9CiAgICAgICAgfQp9Cg==