[PATCH] [Patch] Loop Interchange Pass

[Karthik Bhat]

Hi Hal,
Thanks for the review.
Please find the updated patch. Moved tests from vectorize.ll to profitability.ll and interchange.ll. Checking for loop interchange as per comments. Also added a negative test case to check profitabilitymodel.(i.e. were it is legal but not profitable to interchange).

Please let me know if this looks good for initial commit. This pass is currently disabled by default.

Thanks and Regards
Karthik Bhat


http://reviews.llvm.org/D7499

Files:
  include/llvm/InitializePasses.h
  include/llvm/LinkAllPasses.h
  include/llvm/Transforms/Scalar.h
  lib/Transforms/Scalar/CMakeLists.txt
  lib/Transforms/Scalar/LoopInterchange.cpp
  lib/Transforms/Scalar/Scalar.cpp
  test/Transforms/LoopInterchange/currentLimitation.ll
  test/Transforms/LoopInterchange/interchange.ll
  test/Transforms/LoopInterchange/profitability.ll

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