[Bug ipa/64858] New: [5 Regression] Libreoffice build failure caused by ICF crash

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64858

            Bug ID: 64858
           Summary: [5 Regression] Libreoffice build failure caused by ICF
                    crash
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org

trippels@gcc2-power8 ~ % cat xpathobject.ii
template <class reference_type> class A
{
  reference_type *m_pBody;
public:
  A (const A &) { m_pBody->acquire (); }
};
class B;
class C
{
protected:
  B *_pInterface;
};
template <class interface_type> class I : C
{
public:
  I (interface_type *);
};
class B
{
public:
  virtual void acquire ();
};
class D
{
protected:
  void acquire ();
};
template <class Ifc1> class J : D, public Ifc1
{
  void
  acquire ()
  {
    D::acquire ();
  }
};
class K : B
{
};
class L;
class F
{
  A<L> m_pDocument;
  F (A<L> const &, int &&);
};
class XUnoTunnel;
class XEventTarget;
template <class, class> class WeakImplHelper3 : D, B
{
  void
  acquire ()
  {
    D::acquire ();
  }
};
template <class> class G
{
public:
  void
  acquire ()
  {
    WeakImplHelper3<XUnoTunnel, XEventTarget> ();
  }
};
struct H
{
  H ()
      : mxAttribList (new J<B>), mxCurrentHandler (0), mxDocHandler (0),
        mxTokenHandler (0)
  {
  }
  I<J<B> > mxAttribList;
  I<int> mxCurrentHandler;
  I<int> mxDocHandler;
  I<int> mxTokenHandler;
};
class L : public G<int>
{
};
class M : public J<K>
{
public:
  M ();
};
template <class interface_type> I<interface_type>::I (interface_type *p1)
{
  B *a = static_cast<B *> (static_cast<void *> (p1));
  _pInterface = a;
  _pInterface->acquire ();
}
F::F (A<L> const &p1, int &&) : m_pDocument (p1) { I<K> (new M); }


trippels@gcc2-power8 ~ % g++ -O2 -std=gnu++11 -c xpathobject.ii
xpathobject.ii:90:66: internal compiler error: Segmentation fault
 F::F (A<L> const &p1, int &&) : m_pDocument (p1) { I<K> (new M); }
                                                                  ^
0x10a141eb crash_signal
        ../../gcc/gcc/toplev.c:383
0x11070c88 tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../gcc/gcc/tree.h:2845
0x11070c88 ipa_icf::sem_function::init()
        ../../gcc/gcc/ipa-icf.c:786
0x11074923 ipa_icf::sem_item_optimizer::parse_nonsingleton_classes()
        ../../gcc/gcc/ipa-icf.c:1865
0x1107c353 ipa_icf::sem_item_optimizer::execute()
        ../../gcc/gcc/ipa-icf.c:1721
0x1107d173 ipa_icf_driver
        ../../gcc/gcc/ipa-icf.c:2461
0x1107d173 ipa_icf::pass_ipa_icf::execute(function*)
        ../../gcc/gcc/ipa-icf.c:2509
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.