[PATCH] D141464: [X86]: Match (xor TSize - 1, ctlz) to `bsr` instead of `lzcnt` + `xor`

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n updated this revision to Diff 488472.
goldstein.w.n added a comment.

Fix some nits


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D141464/new/

https://reviews.llvm.org/D141464

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/clz.ll

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