On Wed, May 4, 2011 at 08:30, Richard Kenner <ken...@vlsi1.ultra.nyu.edu> wrote: >> There are pros and cons about early optimization, actually. >> Generating extremely optimized IL very early can actually tie up >> subsequent passes. For instance, loop unrolling and vectorization. >> There are others in the literature. > > Sure, in the sorts of examples you mention where there's a level of > "globality" to it. But I don't see it in the types of things that > fold does. How could it ever be better to leave "a - a" in the tree > instead of "0"?
Yes, that's true. Diego.
