[PATCH] D139610: [AArch64][DAGCombiner] fold instruction EON from ISD::XOR

[chenglin.bi via Phabricator via llvm-commits]

bcl5980 created this revision.
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This patch add a new target ISD AArch64ISD::SEON to represent scalar version instruction eon.
And select the ISD in the stage combine from this pattern:
((X & C) ^ Y) ^ C --> eon Y, (X | ~C)


https://reviews.llvm.org/D139610

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

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