[Bug tree-optimization/60871] New: internal compiler error: in possible_polymorphic_call_targets, at ipa-devirt.c:1510

["holger.hopp at sap dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60871

            Bug ID: 60871
           Summary: internal compiler error: in
                    possible_polymorphic_call_targets, at
                    ipa-devirt.c:1510
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: holger.hopp at sap dot com

Following code throws an internal compiler error with g++-4.9 -O2

$ g++ -O2 -c tst.c
tst.c: In static member function âstatic void C11::comp()â:
tst.c:88:1: internal compiler error: in possible_polymorphic_call_targets, at
ipa-devirt.c:1510
 }
 ^
0x9e77a8 possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, int*)
    ../../gcc/ipa-devirt.c:1510
0x9a3b67 possible_polymorphic_call_targets(tree_node*, bool*, void**)
    ../../gcc/ipa-utils.h:142
0x9a0d56 gimple_fold_call
    ../../gcc/gimple-fold.c:1126
0x9a0d56 fold_stmt_1
    ../../gcc/gimple-fold.c:1239
0xbbc5b9 fold_marked_statements
    ../../gcc/tree-inline.c:4541
0xbc9b54 optimize_inline_calls(tree_node*)
    ../../gcc/tree-inline.c:4622
0x10639b9 early_inliner
    ../../gcc/ipa-inline.c:2303
0x10639b9 execute
    ../../gcc/ipa-inline.c:2366
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Please include the complete backtrace with any bug report.
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Source:

void *vptr;

class C2
{
public:
  static inline C2 * cbss()
  {
    singleton = (C2 *)vptr;
    return singleton;
  }

private:
  static C2 * singleton;
};

class C3
{
public:
  C3(void) {}
  virtual void sf();
protected:
  unsigned m_local:1;
};

class C4 : virtual public C3
{
public:
 C4(void) : C3() {}
protected:
  void sf() { }
  void uf() { }
};

class C5
{
private:
  C3 * m_g;
public:
  C5(C3 * g) : m_g(g)  { m_g->sf(); }
};

class C6
{
public:
  virtual ~C6() {}
};

class C7 : public C6
{
protected:
  C7(void) {}
};

class C8 : public C4, public C7
{
public:
 C8(void) : C3(), C4(), C7() { }
};

class C9 : public C8
{
public:
 C9(void) : C3(), C8() { }
};

class C10 : public C9
{
protected:
 C10(void) : C3(), C9() { }    
};

class C11 : public C10
{
protected:
 C11( const C2 * s ) : C3(), C10() { }

public:
  static void comp(void)
  {
    C11 a(C2::cbss());
    C5 uf(&a);
  }
};

void foo (void)
{
  C11::comp();
}