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Re: Improve heuristic for global-vs-local regs
- From: Toon Moene <moene at knmi dot nl>
- To: matz at suse dot de
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Tue, 31 Jan 2006 06:56:52 +0000
- Subject: Re: Improve heuristic for global-vs-local regs
> So, I've regtested the thing again on i686,x86-64,ppc,ppc64,ia64 with
> trunk without regressions. I've also done some SPEC runs on ia64, ppc
> and x86-64 and got only 1% changes mostly (in fact most of the
> executables were just the same or had slightly different allocation,
> but no different spills).
I got a 2 % improvement in performance for HIRLAM (our limited area
weather forecasting model) using 110407, compiling it with options -g
-O2 -ffast-math on x86_64-unknown-linux-gnu (64 bit mode). This Fortran
code.
Cheers,
--
Toon Moene, KNMI, The Netherlands
Phone: +31 30 2206443; e-mail: moene@knmi.nl