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To: Scott D. who wrote (20901)	11/28/2000 8:51:53 PM
From: fyodor_	Read Replies (1) \| Respond to of 275872

Scott: For example, a common problem with global pointers is that they often prevent the compiler from being able to prove two memory references are distinct locations. Consequently, this prevents certain reordering transformations. If you are using globals you should be shot, anyway. (Well, at least if my understanding is correct.. cough... that globals are not (never?) stored in the registers... or something... I don't recall exactly :/... globals are bad for stuff like that! ;)) -fyo

To: Scott D. who wrote (20901)	11/29/2000 3:07:07 PM
From: Steve Porter	Read Replies (1) \| Respond to of 275872

Scott: <For example, a common problem with global pointers is that they often prevent the compiler from being able to prove two memory references are distinct locations. > Scott, global pointers aren't too much of an issue, as good coders will use them only when necessary and they are often not performance critical. Aliasing is the biggest problem with writing an optimizing compiler for C/c++. I personally avoid aliasing at all costs (as a result I often work with only pointers in inner loops (pointers that are declared as pointers and always accessed as pointers)). Then I hit the 'assume no aliasing' flag in MSVC.. it does wonders for the code generation. Of course, I'm NOT your typical programmer, as I will drop down to inline assmebly when I need more performance.. but then again I fear I'm a dying bread (and luckily I'm only 24).. ;) Steve