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// { dg-do run }

// Copyright (C) 2001 Free Software Foundation, Inc.

// Contributed by Nathan Sidwell 31 Jul 2001 

// Bug 3820. We were bit copying empty bases including the

// padding. Which clobbers whatever they overlay.

struct Empty {};

struct Inter : Empty {};

long now = 0;

struct NonPod

{

  long m;

  NonPod () {m = 0x12345678;}

  NonPod (long m_) {m = m_;}

  NonPod &operator= (NonPod const &src) {now = m; m = src.m; return *this;}

  NonPod (NonPod const &src) {m = src.m;}

};

struct A : Inter

{

  A (long c) {m = c;}

  NonPod m;

};

struct B

{

  Inter empty;

  NonPod m;

  B (long c) {m = c;}

};

struct C : NonPod, Inter

{

  C (long c) : NonPod (c), Inter () {}

};

int main ()

{

  A a (0x12131415);

  long was = a.m.m;

  a = 0x22232425;

  if (was != now)

    return 1;   // we copied the empty base which clobbered a.m.m's

                // original value.

  A b (0x32333435);

  *(Inter *)&a = *(Inter *)&b;

  if (a.m.m != 0x22232425)

    return 2;   // we copied padding, which clobbered a.m.m

  A b2 (0x32333435);

  (Inter &)b2 = Inter ();

  if (b2.m.m != 0x32333435)

    return 2;   // we copied padding, which clobbered b2.m.m

  B c (0x12131415);

  was = c.m.m;

  c = 0x22232425;

  if (was != now)

    return 3;

  B d (0x32333435);

  c.empty = d.empty;

  if (c.m.m != 0x22232425)

    return 4;

  C e (0x32333435);

  if (e.m != 0x32333435)

    return 2;   // we copied padding

  return 0;

}