[PATCH] C undefined behavior fix

[mike stump]

> From: Paul Mackerras <paulus@samba.org>
> Date: Sun, 6 Jan 2002 16:32:05 +1100 (EST)

> * I need a way to tell the compiler not to make any assumptions about
>   what objects that such a pointer might or might not point to, so
>   that the effect of dereferencing the pointer is simply to access the
>   memory at the address I gave, and is not considered "undefined"
>   regardless of how I might have constructed the address.

> GCC already does the first and third, but there doesn't seem to be a
> clean and reliable way to do the second.

I gave such a snippet of code in my previous posting.  Please show me
when it doesn't work.  I am unaware.