[PATCH] D150416: [RISCV] Add a pass to combine `cm.pop` and `ret` insts

[Xinlong Wu via Phabricator via llvm-commits]

VincentWu created this revision.
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`RISCVPushPopOptimizer.cpp` combine `cm.pop` and `ret` to generates `cm.popretz` or `cm.popret` .


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D150416

Files:
  llvm/lib/Target/RISCV/CMakeLists.txt
  llvm/lib/Target/RISCV/RISCV.h
  llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfo.h
  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/callee-saved-gprs.ll
  llvm/test/CodeGen/RISCV/push-pop-popret.ll

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