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// { dg-do run  }

// { dg-options "-fno-strict-aliasing" }

// Test various aspects of vtable layout.

// Origin: Mark Mitchell 

#if defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100

struct S0

{

  virtual void h ()

  {

  }

  int k;

};

struct S1

{

  virtual void f ()

  {

  }

  int i;

};

struct S2 : virtual public S0

{

  virtual void g ()

  {

  }

  int j;

};

struct S3

{

  virtual void k ()

  {

  }

  int l;

};

struct S4 : public virtual S1, public S2, public S3

{

};

inline void* vtable (void *object)

{

  // The vptr is always the first part of the object.

  return * (void **) object;

}

int main ()

{

  // The vtable layout order for S4 should consist of S4's primary

  // vtable (shared with S2), followed by the vtable for S3 (because

  // it is a non-virtual base).  Then, these should be followed by the

  // the vtables for S1 and S0, which are virtual.

  S4 s4;

  S0 *s0 = &s4;

  S1 *s1 = &s4;

  S2 *s2 = &s4;

  S3 *s3 = &s4;

  if (vtable (&s4) != vtable (s2))

    return 1;

  if (vtable (s2) >= vtable (s3))

    return 2;

  if (vtable (s3) >= vtable (s1))

    return 3;

  if (vtable (s1) >= vtable (s0))

    return 4;

}

#else /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */

int main ()

{

}

#endif /* !(defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100) */