先看一个简单的例子;
(defun t1 () (princ "t1"))
(defun t4()
(defun t2 () (princ "t2"))
(defun t3 () (princ "t1"))
(princ "t4")
)
(defun t5 ()(t1)(t2)(t3)(t4)
)
正常编译后，可以完美反编译。
如果在编译的时候，选择了优化，再编辑一下全局声明，drop掉 t2 t3 t4,编译后用某流行反编译软件进行反编译，得到如下结果：
(DEFUN T1() (PRINC "t1" ) )
(DEFUN C:XXXXXXXXX() (DEFUN C:XXXXXXXXX() (PRINC "t2" ) ) (DEFUN C:XXXXXXXXX() (PRINC "t1" ) ) (PRINC "t4" ) )
nil
(DEFUN T5() (T1 ) (&H24 ) (&H43 ) (&H14 ) )
可以看出， t2 t3 t4变样了，已经不是原来的代码
