[PATCH] D88578: [InstCombine] recognizeBSwapOrBitReverseIdiom - support for 'partial' bswap patterns (PR47191)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
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If we're bswap'ing some bytes and zero'ing the remainder we can perform this as a bswap+mask which helps us match 'partial' bswaps as a first step towards folding into a more complex bswap pattern.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88578

Files:
  llvm/lib/Transforms/Utils/Local.cpp
  llvm/test/Transforms/InstCombine/bswap.ll

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