[PATCH] [LoopVectorize] Move LoopAccessAnalysis to its own module

[Adam Nemet]

In http://reviews.llvm.org/D7285#116434, @hfinkel wrote:

> I'm assuming the idea is to turn this into a proper analysis pass, but this is a good intermediate step. LGTM.


Yes, this was the first step of pure refactoring.  Thanks.


http://reviews.llvm.org/D7285

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