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Re: Minor CCP improvement and add comments to tree.h
On Wed, 2004-09-22 at 16:42, Jeffrey A Law wrote:
> On Wed, 2004-09-22 at 10:55, Diego Novillo wrote:
> > On Wed, 2004-09-22 at 12:07, Jeffrey A Law wrote:
> > >
> > Yes. ATM, you would need to run value numbering again
> > (tree-ssa-pre.c:compute_avail). But perhaps we could make that a global
> > entry point. The thing is that value handles for an expression depend
> > on value handles on their operands, so there is some cascading effect.
> Well, in that magical day in the future when we have immediate use
> information, the update of value numbers can be implemented by
HaHa. Vapourrrrware.
It works on my machine now. Bootstraps and everything as of today. We
spend WAY too much time linking and unlinking things in the list due to
the way we *constantly* rebuild operands tho. resizing PHI nodes is no
great shakes either. sigh. I have a plan tho (of course :-)
I can at least make this initial version available for you to fool
around with after I clean it up a bit.
Andrew