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Re: PING fwprop and pr/19653
- From: Bernd Schmidt <bernds_cb1 at t-online dot de>
- To: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 09 Mar 2006 00:06:27 +0100
- Subject: Re: PING fwprop and pr/19653
- References: <440E93D0.80208@lu.unisi.ch>
Paolo Bonzini wrote:
fwprop merge, stage 2 project:
http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01420.html
http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01421.html
I don't yet see a completely convincing argument that this really is a
full replacement of cse's path following. I played with it a little and
got a few cases of missed optimizations, but I have no clear data to
indicate whether that's a problem. Benchmark results of baseline,
(baseline + fwprop), and (baseline + fwprop - expensive-parts-of-cse),
across as many targets as possible, would be welcome.
You'll get bonus points if you can eliminate combine.c too :)
Bernd