1  /* { dg-do compile } */
       2  
       3  char *ustol_dpp;
       4  void ustol(int flags)
       5  {
       6    char *s;
       7    if (s)
       8      flags |= 3;
       9    switch (flags & 3)
      10    case 3:
      11      while (*s)
      12      case '+':
      13        ++s;
      14    if (flags)
      15      ustol_dpp = s;
      16  }