[PATCH] Reimplement heuristic for estimating complete-unroll optimization effects.

[Michael Zolotukhin]

Hi Chandler,

Have had a chance to take a look at the patch?

Thanks,
Michael

> On Feb 26, 2015, at 3:28 PM, Michael Zolotukhin <mzolotukhin at apple.com> wrote:
> 
> Hi,
> 
> I also checked compile-time impact of the change, and didn't see any noticeable changes when building SPEC2006.
> 
> Below are the compile time results:
> 
>  Test                   CompleteUnrollOn     CompleteUnrollOff
>  400.perlbench          23.55                23.55
>  401.bzip2              2.12                 2.10
>  403.gcc                76.42                76.00
>  429.mcf                0.46                 0.45
>  445.gobmk              17.93                17.92
>  456.hmmer              5.17                 5.17
>  458.sjeng              2.33                 2.30
>  462.libquantum         0.72                 0.71
>  464.h264ref            12.91                12.80
>  471.omnetpp            34.59                35.06
>  473.astar              0.96                 0.96
>  483.xalancbmk          177.89               178.46
> 
> I tend to think that the differences are just a noise.
> 
> 
> http://reviews.llvm.org/D7837
> 
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