[llvm] r199015 - LoopVectorizer: Enable strided memory accesses versioning per default

[Eric Christopher]

Did you see any benefits?

-eric

On Sat, Jan 11, 2014 at 12:40 PM, Arnold Schwaighofer
<aschwaighofer at apple.com> wrote:
> Author: arnolds
> Date: Sat Jan 11 14:40:34 2014
> New Revision: 199015
>
> URL: http://llvm.org/viewvc/llvm-project?rev=199015&view=rev
> Log:
> LoopVectorizer: Enable strided memory accesses versioning per default
>
> I saw no compile or execution time regressions on x86_64 -mavx -O3.
>
> radar://13075509
>
> Modified:
>     llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp
>
> Modified: llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp?rev=199015&r1=199014&r2=199015&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp (original)
> +++ llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp Sat Jan 11 14:40:34 2014
> @@ -126,7 +126,7 @@ TinyTripCountVectorThreshold("vectorizer
>  ///    } else
>  ///      ...
>  static cl::opt<bool> EnableMemAccessVersioning(
> -    "enable-mem-access-versioning", cl::init(false), cl::Hidden,
> +    "enable-mem-access-versioning", cl::init(true), cl::Hidden,
>      cl::desc("Enable symblic stride memory access versioning"));
>
>  /// We don't unroll loops with a known constant trip count below this number.
>
>
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