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/* { dg-do run } */

/* { dg-options "-O2"  } */

#if __SIZEOF_INT__ == 2 && __SIZEOF_LONG__ == 4

#define unsigned unsigned long

#endif

extern "C" void abort (void);

struct S

{

  void __attribute__((noinline)) set(unsigned val)

    {

      data = val;

      if (data != val)

        abort ();

    }

  int pad0;

  unsigned pad1 : 8;

  unsigned data : 24;

  int pad2;

};

int main()

{

  S s;

  s.pad2 = -1;

  s.set(0);

  if (s.pad2 != -1)

    abort ();

}