[PATCH] D143621: [LoongArch] Implement the convertSelectOfConstantsToMath hook

[Gong LingQin via Phabricator via llvm-commits]

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Normally, the ISD::SELECT is lowered to maskeqz + masknez. This is
inefficient when operands are constants that can be computed easily.
To avoid that, override TargetLowering::convertSelectOfConstantsToMath.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143621

Files:
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/test/CodeGen/LoongArch/select-const.ll

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