RFA: New optimization: Convert local statics into non-statics

[Robert Dewar]

Diego Novillo wrote:
> On Mon, Jul 14, 2008 at 08:58, Steven Bosscher <stevenb.gcc@gmail.com> wrote:
> 
>>> --- 1,560 ----
>>> + /* Copyright (C) 2008 Free Software Foundation, Inc.
>>> +    Contributed by Diego Novillo <dnovillo@redhat.com>
>> Diego is not at Redhat anymore AFAIK.
> 
> But I wrote the pass while I was at Red Hat, so I think the
> attribution is appropriate.
> 
> Regarding the usefulness of the pass.  It's really not very useful in
> general, it is a benchmark-specific optimization.  I don't think there
> is "real" code out there that can benefit from this.  But the pass is
> very simplistic, so if someone volunteers to maintain it I guess I
> don't have any problem enabling it with some -f switch.

I think an entire separate pass that is specifically benchmark oriented
seems a bad idea, unless there are real world programs, I would forget
about this optimization, unless it falls out of some more general
optimization.

After all, if you really want to get into the business of optimizations
that are only good for one benchmark, why not go all the way, recognize
the source of the benchmark, and substitute optimal code?
> 
> 
> Diego.