Massive performance regression from switching to gcc 4.5

[Richard B. Kreckel]

Jan Hubicka wrote:
>> On Fri, 25 Jun 2010, it was written:
>> There sure is something in 4.5. I've seen a 1-10% slowdown at the GiNaC
>> (a computer algebra library) benchmark suite after switching from 4.4 to
>> 4.5 on x86_64 when compiling with -O2. And there hasn't been a measurable
>> performance differences between 4.3 and 4.4.
> 
> FP intensive code could be also affected by:

This code isn't using floating-point.

   -richy.
-- 
Richard B. Kreckel
<http://www.ginac.de/~kreckel/>