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


On Thu, Apr 29, 2010 at 12:25:15PM -0400, Vladimir Makarov wrote:
....
>
>  Currently Graphite gives small improvements on x86 (one exception is
> 2% for peak x86 SPECFP2000) and mostly degradation on x86_64 (with
> maximum one more than 10% for SPECFP2000 because of big degradations
> on mgrid and swim).  So further work is needed on the project because
> it seems not mature yet.
>

Vladimir,
  Keep in mind that -fgraphite-identity currently still causes
vectorization opportunities to be missed. Once that if fixed
the higher level graphite optimizations may look alot better.
             Jack


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