[Bug c++/39095] [4.4 Regression] Mangling changes break ABI

["pedro dot lamarao at mndfck dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from pedro dot lamarao at mndfck dot org  2009-02-04 13:02 -------
I can confirm this bug on my system.

[psilva@joana GCC]$ uname -a
Linux joana 2.6.27.12-170.2.5.fc10.i686 #1 SMP Wed Jan 21 02:09:37 EST 2009
i686 i686 i386 GNU/Linux

[psilva@joana GCC]$ g++ -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla
--enable-bootstrap --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --enable-plugin
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre
--enable-libgcj-multifile --enable-java-maintainer-mode
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib
--with-cpu=generic --build=i386-redhat-linux
Thread model: posix
gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC)

[psilva@joana GCC]$ g++-4.4 -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../trunk/configure --prefix=/opt/gcc-4.4 --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=release
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-languages=c,c++ --with-cpu=generic --build=i386-redhat-linux
Thread model: posix
gcc version 4.4.0 20090204 (experimental) (GCC)

[psilva@joana GCC]$ cat test.cpp
struct B
{
  int b;
};

B b;

struct A
{
  B *operator->() const
  {
    return &b;
  }
  A () {}
};

A a;

int foo ()
{
  return a->b;
}

[psilva@joana GCC]$ g++ -c -o 43.o test.cpp

[psilva@joana GCC]$ g++-4.4 -c -o 44.o test.cpp

[psilva@joana GCC]$ nm 43.o
00000039 t _GLOBAL__I_b
00000000 T _Z3foov
00000016 t _Z41__static_initialization_and_destruction_0ii
00000000 W _ZN1AC1Ev
00000000 W _ZNK1AptEv
00000004 B a
00000000 B b

[psilva@joana GCC]$ nm 44.o
00000039 t _GLOBAL__I_b
00000000 T _Z3foov
00000016 t _Z41__static_initialization_and_destruction_0ii
00000000 W _ZN1AC1Ev
00000000 W _ZNK1AdtEv
         U __gxx_personality_v0
00000004 B a
00000000 B b


-- 

pedro dot lamarao at mndfck dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pedro dot lamarao at mndfck
                   |                            |dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39095