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Re: contribution
- From: Toon Moene <moene at knmi dot nl>
- To: gcc at gcc dot gnu dot org
- Date: Fri, 12 Apr 2002 12:34:16 +0000
- Subject: Re: contribution
- Organization: Royal Netherlands Meteorological Institute
Andi Kleen wrote:
> Alexey Starovoytov <starlex@eng.sun.com> writes:
>> For example SPECfp benchmark 172.mgrid showed 48% improvement
>> compiled with "-O2 -Ws,-O2,-fno-strict-aliasing" vs plain GCC
>> with "-O2"
> You could compiled 172.mgrid with gcc twice this way and it showed
> 48% improvement ? Or did you use a different compiler as backend?
> If you used gcc - is it known where that huge difference comes
> from?
A more important aspect of such a compiler would be idempotency.
I.e., is
gcc(gcc(x.c)) = gcc(x.c)
?
[ Ducks :-) ]
--
Toon Moene, KNMI, PO Box 201, 3730 AE De Bilt, The Netherlands.
Tel. +31302206443, Fax +31302210407, e-mail moene@knmi.nl
URL: http://www.knmi.nl/hirlam