Arnold Schwaighofer 7e2ca6e74e 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

llvm-svn: 174932

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

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