1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-optimized" } */
       3  
       4  struct B {
       5      unsigned bit0 : 1;
       6      unsigned bit1 : 1;
       7  };
       8  
       9  void
      10  foo (struct B *b)
      11  {
      12    b->bit0 = b->bit0 | b->bit1;
      13  }
      14  
      15  /* { dg-final { scan-tree-dump-not "\\\(unsigned" "optimized" } } */