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    /* Build a rotate expression on a 40 bit argument.  */
      11    if ((x.b<<8) + (x.b>>32) != res)
      12      abort ();
      13  }
      14  
      15  int main()
      16  {
      17    x.b = 0x0100000001;
      18    test1(0x0000000101);
      19    x.b = 0x0100000000;
      20    test1(0x0000000001);
      21    return 0;
      22  }