[PATCH] D138369: [MLGO][LoopUnroll] Add logging mechanism for loop partial unroll

[Yueh-Ting (eop) Chen via Phabricator via llvm-commits]

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Loop properties are extracted as input features and the partial unroll
count is the decision. An object MLGOAnalysis will be created in the
first time the LoopPass LoopUnrollPass is triggered, logs will
accumulate and all would be flushed at the end of compilation, in the
dtor of LoopUnrollPass.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138369

Files:
  llvm/include/llvm/Transforms/Scalar/LoopUnrollPass.h
  llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp

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