[PATCH] D106140: [LV] Change interface of getReductionPatternCost to return Optional

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: SjoerdMeijer, sdesmalen, david-arm, spatel, RKSimon.
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Currently the Instruction cost of getReductionPatternCost returns an Invalid cost to specify "did not find the pattern". This changes that to return an Optional with None specifying not found, allowing Invalid to mean an infinite cost as is used elsewhere.


https://reviews.llvm.org/D106140

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

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