[Bug c++/44535] New: g++ -O[ 123] generates undefined symbol

[Bug c++/44535] New: g++ -O[ 123] generates undefined symbol

[dimhen at gmail dot com]

g++/trunk/x86/rev.160690 -O0 compile test w/o errors, but with -O[ 123]
generates undefined symbol

# g++ -O0 -c 2010_06_13.cpp && nm -uAC 2010_06_13.o | grep OnProv
# g++ -O -c 2010_06_13.cpp && nm -uAC 2010_06_13.o | grep OnProv
2010_06_13.o:         U FOO::A<char>::OnProv()

# cat 2010_06_13.cpp
namespace FOO {

template <typename T>
class A
{
public:
    A();
    void Enum();
    virtual void OnProv() = 0;
    virtual ~A() { }
};
typedef A<char> B;

template<typename T>
inline A<T>::A()
{
}

template<typename T>
inline void A<T>::Enum ()
{
    OnProv ();
}
} // namespace FOO

class C {};

class D: public C, public FOO::B {
public:
    void OnProv() {}
};

void aaa()
{
    D x;
    x.Enum();
}

# g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/gcc_current/libexec/gcc/i686-redhat-linux/4.6.0/lto-wrapper
Target: i686-redhat-linux
Configured with: ../gcc-current/configure --prefix=/usr/local/gcc_current
--enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=yes
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-languages=c,c++ --with-ppl --with-cloog
--with-tune=generic --with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs : (reconfigured)
../gcc-current/configure --prefix=/usr/local/gcc_current --enable-bootstrap
--enable-shared --enable-threads=posix --enable-checking=yes --with-system-zlib
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object
--enable-languages=c,c++ --with-ppl --with-cloog --with-tune=generic
--with-arch=i686 --build=i686-redhat-linux --enable-lto
--enable-version-specific-runtime-libs
Thread model: posix
gcc version 4.6.0 20100613 (experimental) [trunk revision 160690] (GCC)


-- 
           Summary: g++ -O[ 123] generates undefined symbol
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dimhen at gmail dot com
 GCC build triplet: i686-redhat-linux
  GCC host triplet: i686-redhat-linux
GCC target triplet: i686-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] g++ -O[ 123] generates undefined symbol

[dimhen at gmail dot com]

------- Comment #1 from dimhen at gmail dot com  2010-06-14 10:19 -------
simplified testcase FAIl with -O[23]

namespace FOO {

template <typename T>
class A
{
public:
    void Enum();
    virtual void OnProv() = 0;
    virtual ~A() { }
};
typedef A<char> B;

template<typename T>
void A<T>::Enum ()
{
    OnProv ();
}
} // namespace FOO

class C {};

class D: public C, public FOO::B {
public:
    void OnProv() {}
};

void aaa()
{
    D x;
    x.Enum();
}


-- 

dimhen at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dimhen at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2010-06-14 11:23 -------
Confirmed.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
   Last reconfirmed|0000-00-00 00:00:00         |2010-06-14 11:23:28
               date|                            |
            Summary|g++ -O[ 123] generates      |[4.6 Regression] g++ -O[ 23]
                   |undefined symbol            |generates undefined symbol
   Target Milestone|---                         |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2010-06-15 17:12 -------
Caused by http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159362


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jamborm at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[jamborm at gcc dot gnu dot org]

------- Comment #4 from jamborm at gcc dot gnu dot org  2010-06-15 17:55 -------
We seem to be folding the virtual call to the wrong method.  I'm
investigating...


-- 

jamborm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jamborm at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-06-14 11:23:28         |2010-06-15 17:55:11
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[jamborm at gcc dot gnu dot org]

------- Comment #5 from jamborm at gcc dot gnu dot org  2010-06-16 16:25 -------
Patch posted to the mailing list:
http://gcc.gnu.org/ml/gcc-patches/2010-06/msg01653.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[jamborm at gcc dot gnu dot org]

------- Comment #6 from jamborm at gcc dot gnu dot org  2010-06-28 15:42 -------
Subject: Bug 44535

Author: jamborm
Date: Mon Jun 28 15:42:01 2010
New Revision: 161498

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161498
Log:
2010-06-28  Martin Jambor  <mjambor@suse.cz>

        PR c++/44535
        * gimple-fold.c (get_first_base_binfo_with_virtuals): New function.
        (gimple_get_relevant_ref_binfo): Use get_first_base_binfo_with_virtuals
        instead of BINFO_BASE_BINFO.

        * testsuite/g++.dg/torture/pr44535.C: New test.


Added:
    trunk/gcc/testsuite/g++.dg/torture/pr44535.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535

[Bug c++/44535] [4.6 Regression] g++ -O[ 23] generates undefined symbol

[jamborm at gcc dot gnu dot org]

------- Comment #7 from jamborm at gcc dot gnu dot org  2010-06-28 17:00 -------
Fixed.


-- 

jamborm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44535