1  void foo(void *);
       2  void bar(void *);
       3  void ndisc_fill_addr_option(unsigned char *opt, int data_len,
       4  			    unsigned short addr_type) 
       5  {
       6    int pad;
       7    if (addr_type == 32)
       8      pad = 2;
       9    else
      10      pad = 0;
      11    __builtin_memset(opt + 2, 0, pad);
      12    opt += pad;
      13    __builtin_constant_p(data_len) ? foo (opt+2) : bar (opt+2);
      14  }
      15