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// { dg-do run  }

// { dg-options "-w" }

// Origin: Mark Mitchell 

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

struct S0

{

};

struct S1 : public S0

{

};

struct S2 : public S1

{

  char c;

};

// In S3, the S1 instance is allocated first at offset zero.  The S2

// instance has to be allocated at a subsequent offset; it's first

// part is also an S1.

struct S3 : public S1, public S2

{

};

struct S4

{

  int i;

};

// In S4, in contrast to S3, S2 is allocated first, and S1 can be

// allocated on top of S4.

struct S5 : public S2, public S1, public S4

{

};

// The T classes are by-hand layouts that should be equivalent to the

// S classes.

struct T3

{

  S1 s1;

  S2 s2;

};

struct T5

{

  S2 s2;

  S4 s4;

};

int main ()

{

  if (sizeof (S3) != sizeof (T3))

    return 1;

  else if (sizeof (S5) != sizeof (T5))

    return 2;

}

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

int main ()

{

}

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