[PATCH] D105053: [INSTCOMBINE] Tramsform reduction(shuffle V, poison, unique_mask) to reduction(V).

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, spatel.
Herald added a subscriber: hiraditya.
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After SLP + LTO we may have have reduction(shuffle V, poison,
mask). This can be simplified to just reduction(V) if the mask is only
for single vector and just all elements from this vector are permuted,

  without reusing, replacing with undefs and/or other values, etc.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105053

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/test/Transforms/InstCombine/reduction-shufflevector.ll

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