[PATCH] D152793: [RISCV] Add MC layer support for Zicfisslp.

[Yeting Kuo via Phabricator via cfe-commits]

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The patch adds the instructions in Zicfisslp extension. Zicfisslp extension is
to support shadow stack and landing pad for better control flow integrity.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152793

Files:
  clang/test/Preprocessor/riscv-target-features.c
  llvm/lib/Support/RISCVISAInfo.cpp
  llvm/lib/Target/RISCV/AsmParser/RISCVAsmParser.cpp
  llvm/lib/Target/RISCV/Disassembler/RISCVDisassembler.cpp
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
  llvm/lib/Target/RISCV/RISCVFeatures.td
  llvm/lib/Target/RISCV/RISCVInstrInfo.td
  llvm/lib/Target/RISCV/RISCVInstrInfoZicfisslp.td
  llvm/lib/Target/RISCV/RISCVRegisterInfo.td
  llvm/test/MC/RISCV/attribute-arch.s
  llvm/test/MC/RISCV/zicfisslp-invalid.s
  llvm/test/MC/RISCV/zicfisslp-valid.s

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