[PATCH] D132443: [LSR] Fold terminal condition to other IV when possible

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

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LSR may optimize the loop such that the IV of the terminal condition is
solely used as the temerminal condition. We can imporve on this when
other existing IV is AddRec and can replace the terminal condition.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132443

Files:
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
  llvm/test/Transforms/LoopStrengthReduce/lsr-fold-iv-complicate-add-rec.ll
  llvm/test/Transforms/LoopStrengthReduce/lsr-fold-iv-const-tripcount.ll
  llvm/test/Transforms/LoopStrengthReduce/lsr-fold-iv-runtime-tripcount.ll

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