[PATCH] [Patch] Loop Interchange Pass

[Karthik Bhat]

Hi Hal,
Thanks a lot for the review. Updated the patch to address review comments. Also fixed a few issues which I found during testing.
Major changes include-

1. Logic to calculate profitibility has been made more acurate.
2. Logic to detect were to split the inner loop is changed to be more acurate.
3. Added test case to check the updated profitibility model.

Please let me know your inputs on this.

This still needs major work to support generic loop depths and improved profitability model.
Hopefully will be able to complete it with help from the community.

Thanks once again for the support.

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/dependence.ll

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