[PATCH] D72002: GlobalISel: Handle llvm.read_register

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: paquette, rengolin, aemerson.
Herald added subscribers: Petar.Avramovic, volkan, hiraditya, rovka, nhaehnle, wdng, jvesely.
Herald added a project: LLVM.

Compared to the attempt in bdcc6d3d2638b3a2c99ab3b9bfaa9c02e584993a,
this uses intermediate generic instructions. This does create more
work for targets to support it though.


https://reviews.llvm.org/D72002

Files:
  llvm/include/llvm/CodeGen/GlobalISel/InstructionSelector.h
  llvm/include/llvm/Support/TargetOpcodes.def
  llvm/include/llvm/Target/GenericOpcodes.td
  llvm/lib/CodeGen/GlobalISel/IRTranslator.cpp
  llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp
  llvm/lib/Target/AMDGPU/AMDGPURegisterBankInfo.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/read_register.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/regbankselect-read-register.mir
  llvm/utils/TableGen/GlobalISelEmitter.cpp

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