From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-prs-return-25735-listarch-gcc-prs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 19821 invoked by alias); 5 Dec 2002 04:36:02 -0000
Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Archive: <http://gcc.gnu.org/ml/gcc-prs/>
List-Post: <mailto:gcc-prs@gcc.gnu.org>
List-Help: <mailto:gcc-prs-help@gcc.gnu.org>
Sender: gcc-prs-owner@gcc.gnu.org
Received: (qmail 19791 invoked by uid 71); 5 Dec 2002 04:36:01 -0000
Resent-Date: 5 Dec 2002 04:36:01 -0000
Resent-Message-ID: <20021205043601.19789.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
Resent-Reply-To: gcc-gnats@gcc.gnu.org, snyder@fnal.gov
Received: (qmail 18550 invoked from network); 5 Dec 2002 04:33:00 -0000
Received: from unknown (HELO localhost.localdomain) (131.225.104.31)
  by sources.redhat.com with SMTP; 5 Dec 2002 04:33:00 -0000
Received: (from sss@localhost)
	by localhost.localdomain (8.11.6/8.11.6) id gB54V8210799;
	Wed, 4 Dec 2002 23:31:08 -0500
Message-Id: <200212050431.gB54V8210799@localhost.localdomain>
Date: Wed, 04 Dec 2002 20:36:00 -0000
From: snyder@fnal.gov
Reply-To: snyder@fnal.gov
To: gcc-gnats@gcc.gnu.org
X-Send-Pr-Version: 3.113
Subject: debug/8818: g++ 3.3: missing label definition in debug output
X-SW-Source: 2002-12/txt/msg00264.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         8818
>Category:       debug
>Synopsis:       g++ 3.3: bad assembly code when optimizing (reference to undefined label)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 04 20:36:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     scott snyder
>Release:        3.3 20021203 (experimental)
>Organization:
>Environment:
System: Linux karma 2.4.19-emp_2419p5a829i #1 Tue Sep 3 17:42:17 EST 2002 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure --prefix=/usr/local/gcc --enable-threads=posix --enable-long-long --enable-languages=c,c++,f77
>Description:

When the following source is compiled on linux/x86
with the flags `-fPIC -g -O1', the assembly code contains a reference
to the label `.LC0', which is nowhere defined.  Removing any of these
three switches makes the problem go away.

$ cc1plus -quiet -fPIC -g -O1 x.cc
$ grep LC0 x.s
	.long	.LC0
$

This then causes a link error.

It looks like this reference is part of the debug information.


>How-To-Repeat:

---------------------------------------------
struct RefCounter {
  RefCounter() ;
};

struct ObjDouble  : public RefCounter
{
  ObjDouble(double value) : _value(value) { }
  double _value;
};

int main() {
  double bfield = 2.2;
  new ObjDouble(-bfield);
  new ObjDouble(-bfield);
  return 0;
}

---------------------------------------------

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: