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Re: Thoughts on LLVM and LTO
> Which is why i said "It's fine to say compile time performance of the
> middle end portions ew may replace should be same or better".
>
> And if you were to look right now, it's actually significantly better in
> some cases :(
Can you prove this assertion?
Here is some data:
http://people.redhat.com/dnovillo/spec2000.i686/gcc/global-build-secs_elapsed.html
And some more
http://llvm.cs.uiuc.edu/testresults/X86/2005-11-01.html
I'm not sure about accuracy, or versions of LLVM used, etc.
Although promising on some things (as Diego said), LLVM exectue and
compile performance is a mixed bag.
It would probably be interesting to run SPEC or something else with icc
IPO enabled, LLVM IPO enabled, and whatever gcc IMA support is
available, to do a true comparison of where things stand. More data
would be interesting.
-benjamin