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Re: GCSE store motion


On Thu, 16 May 2002, Robert Dewar wrote:

> > That means we shouldn't be spending much time trying to do software
> > loop pipelining when compiling GCC, so the optimization shouldn't
> > make compiling the compiler significantly slower.
> 
> I don't see how you conclude this. You have to do the analysis on every
> loop.
Not really.
Intel's compiler immediately discounts loops with calls in them.

> There will definitely be loops in GCC where the optimization is
> possible, there will be loops where it is not. I would expect the
> compiler to spend quite a bit of time trying to improve code for
> loops in GCC. What I am saying is that I doubt that the overall
> effect will be that benficial for GCC.

> 


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