[tree-ssa]: Speed up SSAPRE

[Daniel Berlin]

On Fri, 14 Nov 2003, Gerald Pfeifer wrote:

> On Fri, 14 Nov 2003, Daniel Berlin wrote:
> >>> This reduces the PRE time on cleanup1.C from 500 seconds to 50.
> >>> It also removes all but 2 seconds of the GC time.
> >> How about PR8361?
> > One thing at a time.
>
> Sure. :)  Let me rephrase: does this patch make a differenc efor PR8361?
No clue, i'll try to check this weekend, i'm on a bug fixing spree now.
:P