[PATCH] D122572: [X86] combineCarryThroughADD - recognise X86ISD::ADD(AND(X,1),-1) pattern can be folded to X86ISD::BT

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 418904.
RKSimon added a comment.

rebase


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D122572/new/

https://reviews.llvm.org/D122572

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/addcarry.ll
  llvm/test/CodeGen/X86/combine-adc.ll
  llvm/test/CodeGen/X86/subcarry.ll

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