TONT 41583 如果FlushInstructionCache啥事也不做，为什么还要调用它呢？

存在的理由。

原文链接：https://blogs.msdn.microsoft.com/oldnewthing/20031208-00/?p=41583

If you look at the implementation of FlushInstructionCache on Windows 95, you’ll see that it’s just a return instruction. It doesn’t actually do anything. So why do you have to call it?

看一看Windows 95中FlushInstructionCache方法的实现，会发现它只是简单地返回一下就没了，看上去并没有做任何事。那么，为什么你还要调用它呢？

Because the act of calling it is the whole point. The control transfers implicit in calling a function suffice to flush the instruction cache on a Pentium. The function doesn’t have to do anything else; it is fact that you called a function that is important.

因为调用本身就是意义所在。通过调用这个函数，就可以隐式地在Pentium处理器上刷新指令缓存。函数本身不用做任何事，而调用这个方法本身才是最重要的。