[PATCH] D151655: [LoongArch] Support finer-grained DBAR hints for LA664+

[WÁNG Xuěruì via Phabricator via llvm-commits]

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These are treated as DBAR 0 on older uarchs, so we can start to
unconditionally emit the new hints right away.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D151655

Files:
  llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
  llvm/lib/Target/LoongArch/LoongArchISelLowering.h
  llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
  llvm/test/CodeGen/LoongArch/ir-instruction/fence.ll
  llvm/test/CodeGen/LoongArch/ir-instruction/load-store-atomic.ll

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