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Re: gcse pass: expression hash table
On Thu, 2005-02-24 at 22:28 +0100, Steven Bosscher wrote:
> On Thursday 24 February 2005 21:59, Andrew Pinski wrote:
> > On Feb 24, 2005, at 3:55 PM, Tarun Kawatra wrote:
> > > Actually I am trying to extend PRE implementation so that it performs
> > > strength reduction as well. it requires multiplication expressions to
> > > get into hash table.
> >
> > Why do you want to do that?
> > Strength reduction is done already in loop.c.
>
> First, that's a different kind of strength reduction. Second,
> we'd like to blow away loop.c so replacing it would not be a
> bad thing ;-) But the kind of strength reduction PRE can do
> is something different. Didn't Dan already have patches for
> that in the old tree SSAPRE, and some ideas on how to do it
> in GVN-PRE?
yes and yes.
:)