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Re: GCC-4.5.0 comparison with previous releases and LLVM-2.7 on SPEC2000 for x86/x86_64

2010/4/30 Jan Hubicka <hubicka@ucw.cz>:
>> Thanks for the suggestion. Raksit currently is busy with merging trunk
>> changes back to lw-ipo branch which can be a daunting task. After that
>> this can be done. ?(Our internal release is based on 4.4).
>
> I must say that LIPO is something I always intend to look into but didn't
> seriously find time for that yet (well, hoping that submitting the thesis will
> make this easier).
> What are the LIPO's features that are missing in -flto -fprofile-use?

LIPO is a completely different approach, basically independent of LTO.
There is a good explanation of it on the wiki, see
http://gcc.gnu.org/wiki/LightweightIpo.

Ciao!
Steven
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