gcc4.0 recent >15% runtime performance regression

Uros Bizjak uros@kss-loka.si
Mon Jan 3 09:05:00 GMT 2005


tbp wrote:

>>Which -mfpmath= option did you use to produce above code?
>>    
>>
>-mfpmath=sse (-O2 -march=k8 -ffast-math and a bunch of others).
>
>What should i provide to help you pinpoint the cause?
>
>  
>
It would be nice to have a small testcase, or perhaps access to source 
code. I googled for mono-ray, but didn't found anything usable.
I suggest that you file a bugreport 
(http://gcc.gnu.org/bugzilla/enter_bug.cgi), where all discussion 
regarding this bug should take place.

Uros.



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