Arnold Schwaighofer 4fc6484ee2 Cost model: Add check for reverse shuffles to CostModel analysis ...

Check for reverse shuffles in the CostModel analysis pass and query
TargetTransform info accordingly. This allows us we can write test cases for
reverse shuffles.

radar://13171406

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174932 91177308-0d34-0410-b5e6-96231b3b80d8

2013-02-12 02:40:37 +00:00

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