[cfe-dev] [LLVMdev] Phoronix: Benchmarking LLVM & Clang Against GCC 4.5
howarth at bromo.med.uc.edu
Tue Apr 27 06:34:31 PDT 2010
On Tue, Apr 27, 2010 at 09:37:53AM +0100, Renato Golin wrote:
> On 27 April 2010 08:18, Stefano Delli Ponti
> <stefano.delliponti at gmail.com> wrote:
> > FYI
> > http://www.phoronix.com/scan.php?page=article&item=gcc_llvm_clang&num=1
> For Apache and Dhrystone, the performance boost is good (but only the
> former is really important), but for the rest, especially those with
> image/sound processing, and HMMR, it's still far behind. Is this only
> because there is no auto vectorization in LLVM?
Doesn't llvm-gcc still lack autovectorization support as well? It's
numbers are closer to the stock gcc releases suggesting the problem
isn't from the absence of vectorization, no?
> Would be good to know why some programs were not compiled with Clang.
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