Wow!

J.C. Pizarro jcpiza@gmail.com
Tue Jul 3 14:31:00 GMT 2007


Uros Bizjak <ubizjak at gmail dot com> Mon, 02 Jul 2007 20:29:41 +0200 wrote:
> Hello!
>
> It is worth noticing that latest changes to gcc brought more than 75% speed-up on Polyhedron aermod.f90 benchmark [1]. I can confirm this on 32bit nocona, and double-checked on 64bit core2:
>
> gcc -O3 -funroll-loops -ftree-vectorize -ffast-math:
>
> (GCC) 4.3.0 20070622 : 0m33.530s
> (GCC) 4.3.0 20070702 : 0m11.805s
>
>
> [1]: http://www.suse.de/~gcctest/c++bench/polyhedron/polyhedron-summary.txt-2-0.html
>
> Uros.

Please, to add the option -S and -fdump-tree-gimple to the script,
and paste the ".s" and ".gimple" files to see the differences since
the real or abstract machine.

Bye xuxi



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