[PATCH] D143037: [LoongArch] Override TargetLowering::hasAndNotCompare()

[Gong LingQin via Phabricator via llvm-commits]

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Override hasAndNotCompare() to use more `ANDN` instead of using `AND`
and `NOT`.
This patch enables the following transforms:
(X & Y) == Y ---> (~X & Y) == 0
(X & Y) != Y ---> (~X & Y) != 0.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D143037

Files:
  llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/test/CodeGen/LoongArch/andn-icmp.ll

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