[PATCH] D149278: [RISCV] Deprecate CSR names that are not in Privileged Specification 1.12.

[Craig Topper via Phabricator via llvm-commits]

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These are from the N extension (User-Level Interrupts) which did
not make it into 1.12 of the Privileged Specification.

D117653 <https://reviews.llvm.org/D117653> also tried to remove some of these, but it was never reviewed.

The version here gives a warning instead of completely removing.
This implementation is based on what has been in our downstream for
a while.

I'm fine with completely removing if that's preferable. Posting this
patch to start discussion.

Co-authored-by: Nelson Chu


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149278

Files:
  llvm/docs/ReleaseNotes.rst
  llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
  llvm/lib/Target/RISCV/RISCVSystemOperands.td
  llvm/test/MC/RISCV/deprecated-csr-names.s
  llvm/test/MC/RISCV/supervisor-csr-names.s
  llvm/test/MC/RISCV/user-csr-names.s

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