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Re: Will tree-ssa be GCC 3.5?
- From: law at redhat dot com
- To: Joe Buck <jbuck at synopsys dot com>
- Cc: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>, steven at gcc dot gnu dot org, gcc at gcc dot gnu dot org
- Date: Mon, 01 Dec 2003 10:45:04 -0700
- Subject: Re: Will tree-ssa be GCC 3.5?
- Reply-to: law at redhat dot com
In message <20031201093651.A4701@synopsys.com>, Joe Buck writes:
>On Mon, Dec 01, 2003 at 10:15:12AM -0500, Richard Kenner wrote:
>> The question of to what extent optimizations will be improved by doing
>> them at a higher level is one that can only be answered by doing them.
>> Likewise for the cost of such optimizations.
>
>Ten years of experience suggests that certain optimizations needed for
>decent C++ performance will never be done in the current GCC framework.
>tree-ssa is pretty much the only hope.
Agreed!
Hell, I would claim that any kind of modern optimization techniques are
totally unsuitable for either unstructured trees or RTL. For GCC to move
forward and continue to be relevant in the long term against competitors
such as ICC a new optimization framework is absolutely necessary. tree-ssa
is meant to provide that framework.
Jeff