RE: VC.NET 'Optimization'

"Jon Watte" <[email protected]> Mon, 11 Apr 2005 15:24:03 -0700
Newsgroups gmane.games.devel.windows
Message-ID <[email protected]>

> BTW: I'm not entirely sure whether that's a compiler bug or a valid
> optimisation - it depends what your Restart() function does.

The compiler might be doing type-based aliasing to re-order the
functions, if one uses float, and the other int, say.

However, I still don't see how the compiler can do this. Timers 
call into functions that are dllimport, and those functions can 
have arbitrary side effects -- especially in a version of the 
DLL that's not released yet. Thus, no amount of alias analysis 
can allow the compiler to re-order the operations like that, so 
I'd say it's a real bug.

Now, if it's really a bug, how come we're not seeing this all 
over the place? Seems like it would cause pretty much nothing at 
all to actually work...

Cheers,

			/ h+



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