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Re: Serious performance regression -- some tree optimizer questions
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>
- Cc: Andrew Pinski <pinskia at physics dot uc dot edu>, gcc at gcc dot gnu dot org
- Date: Fri, 17 Dec 2004 19:07:08 -0500
- Subject: Re: Serious performance regression -- some tree optimizer questions
- References: <OF03B6FCEC.729E24BF-ONC1256F6D.0082547F-41256F6D.0082EB23@de.ibm.com>
The new tree-level loop optimizations are, well, new. They are a
work in progress and need some more tuning. I believe that there are some
more patches in the wings that can help loop performance further.
However, there is a delicate balance between fixing performance
regressions and not introducing new bugs. We need to see what changes the
fixes entail.
David