[PATCH] D133866: [SelectionDAG] Add helper function to check whether a SDValue is neutral element. NFC.

[Yeting Kuo via Phabricator via llvm-commits]

fakepaper56 updated this revision to Diff 462813.
fakepaper56 added a comment.

Rebase and address RKSimon's comment. I do not replace `foldSelectWithIdentityConstant`
since it makes some axv512 test fails.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133866/new/

https://reviews.llvm.org/D133866

Files:
  llvm/include/llvm/CodeGen/SelectionDAGNodes.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp

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