From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-prs-return-26338-listarch-gcc-prs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 13105 invoked by alias); 16 Dec 2002 21:10:09 -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 13085 invoked by uid 61); 16 Dec 2002 21:10:08 -0000
Date: Mon, 16 Dec 2002 13:10:00 -0000
Message-ID: <20021216211008.13084.qmail@sources.redhat.com>
To: catherin@ca.ibm.com, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
  nobody@gcc.gnu.org
From: bangerth@dealii.org
Reply-To: bangerth@dealii.org, catherin@ca.ibm.com, gcc-bugs@gcc.gnu.org,
  gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Subject: Re: c++/8964: [3.3 regression] [ABI] different mangling of names
X-SW-Source: 2002-12/txt/msg00867.txt.bz2
List-Id: <gcc-prs.sourceware.org>

Old Synopsis: 2 different templates mangled with the same name
New Synopsis: [3.3 regression] [ABI] different mangling of names

State-Changed-From-To: closed->analyzed
State-Changed-By: bangerth
State-Changed-When: Mon Dec 16 13:10:07 2002
State-Changed-Why:
    This little code
    ---------------------------
    template < class T,int I > struct A {
      typedef int X;
    };
    
    template<class T> struct A<T,3> {
      typedef char X;
    };
    
    template <template <class B,int I> class XX>
    void foo(typename XX<int,3>::X a){}
    
    int main() {
      foo<A>('x');   
    }
    -------------------------------
    yields different mangled names with 3.2 and 3.3, which
    is an ABI change that should probably not be there unless
    guarded by -fabi-version:
    
    tmp/g> /home/bangerth/bin/gcc-3.2.2-pre/bin/c++ -c x.cc
    tmp/g> nm x.o | grep foo
    00000000 W _Z3fooI1AEvN2XX1XE
    tmp/g> nm x.o | /home/bangerth/bin/gcc-3.2/bin/c++filt | grep foo
    00000000 W void foo<A>(XX::X)
    
    
    
    tmp/g> /home/bangerth/bin/gcc-3.3-pre/bin/c++ -c x.cc
    tmp/g> nm x.o | grep foo
    00000000 W _Z3fooI1AEvN2XXIiLi3EE1XE
    tmp/g> nm x.o | /home/bangerth/bin/gcc-3.2/bin/c++filt | grep foo
    00000000 W void foo<A>(XX<int, (int)3>::X)

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8964