Hi,
I am studying the effectiveness of Profile Feedback Optimizations in LLVM.
In particular I am interested on how effective it is on Spec2006.
I did a comparison between LLVM, Open64 and GCC compilers using Spec2006 as
a benchmark. LLVM came last in the performance. I did not use PFO for LLVM.
I was wondering if any of you have used PFO in Spec2006 and can give me some
idea about its effectiveness. I also like to know how and with what flags
PFO works correctly and produces the optimal result.
Thanks in advance,
Reza Yazdani
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