This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Serious performance regression -- some tree optimizer questions
- From: Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>
- To: Steven Bosscher <stevenb at suse dot de>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 20 Dec 2004 00:25:47 +0100
- Subject: Re: Serious performance regression -- some tree optimizer questions
Steven Bosscher <stevenb@suse.de> wrote on 12/18/2004 01:18:04 AM:
> When I last looked at mgrid for AMD64, I found -fno-tree-pre to
> be very helpful.
Thanks for the tip; I can see how it might make a difference e.g.
with register pressure in some cases. Unfortunately it hadn't
much effect on my platform ...
Bye,
Ulrich
--
Dr. Ulrich Weigand
Linux for S/390 Design & Development
IBM Deutschland Entwicklung GmbH, Schoenaicher Str. 220, 71032 Boeblingen
Phone: +49-7031/16-3727 --- Email: Ulrich.Weigand@de.ibm.com