[PATCH] D108189: [RISCV] Add arch attribute support for P extension

[Jim Lin via Phabricator via llvm-commits]

Jim created this revision.
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Support emitting and accepting P extension's arch string.
This also fixes that 'p' treated as version number must have a number in front of it.
Otherwise, 'p' means P extension.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108189

Files:
  llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVTargetStreamer.cpp
  llvm/test/CodeGen/RISCV/attributes.ll
  llvm/test/MC/RISCV/attribute-arch-invalid.s
  llvm/test/MC/RISCV/attribute-arch.s

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