Re: RFA: patch for usage of more accurate live information for theglobal and the reload.

[Daniel Berlin <dberlin at dberlin dot org>]

On May 25, 2004, at 4:11 PM, Vladimir Makarov wrote:

> Steven Bosscher wrote:
>
> > > As for data flow equation solver functions from df.c, I found that 
> > > gcc
> > > bootstrap will be ~ 1% slower with them (besides a lot of changes to 
> > > the
> > > patch). So the modified patch still contains the original data 
> > > solver.
> >
> > Please no, not another ad hoc dataflow solver.  We already have
> > too many of those.
> IMHO, df data slover is ad hoc solver too with incovinient interface 
> (I beleive my interface could be more general).

So redesign the interface :).  Heck, tell me what interface you want, 
and *i'll* reimplement the interface if you are too busy.
As we both know, the main important part of the df.c solver is the 
algorithm it uses to solve the dataflow problem, not the equations it 
allows you to use in the problem.
The algorithm it uses will work for any equations, nobody ever needed 
more out of the interface, so nobody ever made it do more.

That's not just a cop out however, since when i originally wrote it, I 
believe I posted some mail to the mailing list asking if i should 
bother making it even more general (so that it could handle more 
complex dataflow problems), and nobody seemed to think that was 
necessary.

--Dan