[llvm-commits] [llvm] r113595 - /llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp

[Daniel Dunbar]

On Fri, Sep 10, 2010 at 10:57 AM, Owen Anderson <resistor at mac.com> wrote:
> Author: resistor
> Date: Fri Sep 10 12:57:00 2010
> New Revision: 113595
>
> URL: http://llvm.org/viewvc/llvm-project?rev=113595&view=rev
> Log:
> Lower the unrolling theshold to 150.  Empirical tests indicate that this is a sweet spot in the performance per
> code size increase curve.

Graphs? :)

 - Daniel

> Modified:
>    llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp
>
> Modified: llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp?rev=113595&r1=113594&r2=113595&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp (original)
> +++ llvm/trunk/lib/Transforms/Scalar/LoopUnrollPass.cpp Fri Sep 10 12:57:00 2010
> @@ -27,7 +27,7 @@
>  using namespace llvm;
>
>  static cl::opt<unsigned>
> -UnrollThreshold("unroll-threshold", cl::init(200), cl::Hidden,
> +UnrollThreshold("unroll-threshold", cl::init(150), cl::Hidden,
>   cl::desc("The cut-off point for automatic loop unrolling"));
>
>  static cl::opt<unsigned>
>
>
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