[PATCH] D64125: [RISCV] Support @llvm.readcyclecounter() Intrinsic

[Sam Elliott via Phabricator via llvm-commits]

lenary updated this revision to Diff 207822.
lenary added a comment.

Address Review Feedback

- Updated lots of comments
- Added some asserts to trigger if we try to introduce or lower the custom pseudo-instruction on rv64.
- Clarify some magic numbers

Potentially this should wait for D64139 <https://reviews.llvm.org/D64139>, so we can use the named
constants that PR introduces.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64125/new/

https://reviews.llvm.org/D64125

Files:
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.cpp
  llvm/lib/Target/RISCV/RISCVISelLowering.h
  llvm/lib/Target/RISCV/RISCVInstrInfo.td
  llvm/test/CodeGen/RISCV/readcyclecounter.ll

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