[PATCH] D139609: [AArch64][DAGCombiner] fold BIC from AND in dagcombiner

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 created this revision.
bcl5980 added reviewers: dmgreen, efriedma, mingmingl.
Herald added subscribers: hiraditya, kristof.beyls.
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This patch add a new target ISD `AArch64ISD::SBIC` to represent scalar version instruction `bic`.
And select the ISD in the stage combine from this pattern:
(~X | C) & Y --> bic Y, (X & ~C)


https://reviews.llvm.org/D139609

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/lib/Target/AArch64/AArch64ISelLowering.h
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/test/CodeGen/AArch64/logical-op-with-not.ll
  llvm/test/CodeGen/AArch64/shiftregister-from-and.ll

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