[PATCH] D109807: [InstCombine] Narrow type of logical operation chains where one side is an extend

[Usman Nadeem via Phabricator via llvm-commits]

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Reassociate chains of `extend(X) | (extend(Y) | Z)` --> `(extend(X) | extend(Y)) | Z`
which will then get optimized to --> `extend(X | Y) | Z`

Helps with vectorization.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109807

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
  llvm/test/Transforms/InstCombine/and-xor-or.ll

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