1  /* { dg-do compile } */
       2  /* PR tree-optimization/107229.  */
       3  
       4  int a, c;
       5  struct {
       6    long d;
       7    int : 8;
       8    int : 27;
       9    int e : 21;
      10  } f;
      11  void g(int b) { a = a & 1; }
      12  int main() {
      13    while (c)
      14      g(f.e);
      15    return 0;
      16  }