[PATCH] D134599: [RISCV] Add CodeGen support of RISCV zcmp Extension

[Xinlong Wu via Phabricator via llvm-commits]

VincentWu created this revision.
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This patch adds codegen support to the zcmp extension.

it add is two passes: 
`RISCVMoveOptimizer.cpp` which combines two mv inst into one `cm.mva01s` or `cm.mva01s`.

`RISCVPushPopOptimizer.cpp` generates and inserts push/pop instructions. In addition to that, the stack order of the eplog and prolog has been reordered for push/pop inst.

co-author: @Lukacma


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134599

Files:
  llvm/lib/Target/RISCV/CMakeLists.txt
  llvm/lib/Target/RISCV/RISCV.h
  llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
  llvm/lib/Target/RISCV/RISCVFrameLowering.h
  llvm/lib/Target/RISCV/RISCVMachineFunctionInfo.h
  llvm/lib/Target/RISCV/RISCVMoveOptimizer.cpp
  llvm/lib/Target/RISCV/RISCVPushPopOptimizer.cpp
  llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
  llvm/test/CodeGen/RISCV/O0-pipeline.ll
  llvm/test/CodeGen/RISCV/O3-pipeline.ll
  llvm/test/CodeGen/RISCV/attributes.ll
  llvm/test/CodeGen/RISCV/callee-saved-gprs.ll
  llvm/test/CodeGen/RISCV/cm_mvas_mvsa.ll
  llvm/test/CodeGen/RISCV/push-pop-popret.ll

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