1  struct foo
       2  {
       3    unsigned long long b:40;
       4  } x;
       5  
       6  extern void abort (void);
       7  
       8  void test1(unsigned long long res)
       9  {
      10    /* The shift is carried out in 40 bit precision.  */
      11    if (x.b<<32 != res)
      12      abort ();
      13  }
      14  
      15  int main()
      16  {
      17    x.b = 0x0100;
      18    test1(0);
      19    return 0;
      20  }