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Commit 9da9a43a authored by Arnold Schwaighofer's avatar Arnold Schwaighofer
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TargetTransformInfo: address calculation parameter for gather/scather 

Address calculation for gather/scather in vectorized code can incur a
significant cost making vectorization unbeneficial. Add infrastructure to add
cost.
Tests and cost model for targets will be in follow-up commits.

radar://14351991

llvm-svn: 186187
parent c5acd1ca
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