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Re: treelang fix for rs6000 / treelang not proper front end
- From: Jeff Sturm <jsturm at one-point dot com>
- To: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- Cc: Tim Josling <tej at melbpc dot org dot au>, Fergus Henderson <fjh at cs dot mu dot OZ dot AU>, Zack Weinberg <zack at codesourcery dot com>, <doko at cs dot tu-berlin dot de>, <gcc at gcc dot gnu dot org>, <neil at daikokuya dot co dot uk>
- Date: Mon, 9 Jun 2003 17:23:07 -0400 (EDT)
- Subject: Re: treelang fix for rs6000 / treelang not proper front end
On Mon, 9 Jun 2003, Steven Bosscher wrote:
> >My understanding from the tree-ssa presentations is that the important RTL
> >optimizers won't be maintained long-term, so I wouldn't want to count on
> >them in a new frontend.
>
> Well, if they are important optimizers, why wouldn't they be
> maintained?
Important to frontends that don't produce GENERIC trees, I mean.
Inlining, PRE, DCE, ...
> I thought the consensus was that we'll always have RTL
> optimizers. Jeff recently even mentioned he would like to keep RTL SSA
> alive and have mid-RTL after all.
I could be very wrong about that. It's also likely that very little is
actually decided; the tree-ssa branch is certainly very ripe for
experimentation. Only experience will eventually show whether certain
optimizers are most effective on RTL or GIMPLE, I'd guess.
Jeff