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Re: too much GCSE on ia64
- To: <gcc at gcc dot gnu dot org>
- Subject: Re: too much GCSE on ia64
- From: Paolo Bonzini <bonzini at wbkst15 dot mach dot uni-karlsruhe dot de>
- Date: Tue, 16 Jan 2001 17:32:16 +0100 (CET)
Brad, thanks for your analysis -- it's right, I have loads of computed
gotos that implement prefetching and predecoding in order to take
advantage of branch registers on the ia64.
I agree that reloading everything is correct. But, the very idea of
having sixty or so common subexpressions that are as simple as `x+8',
`x+24' and so on is overzealous in my opinion. GCC cannot know that my
caches are reloaded about once every five bytecodes, but the behavior is