[PATCH] D139424: [Arm][AArch64] Add support for v8.9-A/v9.4-A base extensions

[Lucas Prates via Phabricator via llvm-commits]

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This implements the base extensions that are part of the v8.9-A and
v9.4-A architecture versions, including:

- The Clear BHB Instruction (FEAT_CLRBHB)
- The Speculation Restriction Instruction (FEAT_SPECRES2)
- The SLC target for the PRFM instruction
- New system registers:
  - ID_AA64PFR2_EL1
  - ID_AA64MMFR3_EL1
  - HFGITR2_EL2
  - SCTLR2_EL3

More information on the new extensions can be found on:

- https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/arm-a-profile-architecture-2022
- https://developer.arm.com/downloads/-/exploration-tools

Contributors: Sam Elliott, Tomas Matheson and Son Tuan Vu.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D139424

Files:
  llvm/include/llvm/Support/AArch64TargetParser.def
  llvm/include/llvm/Support/AArch64TargetParser.h
  llvm/lib/Target/AArch64/AArch64.td
  llvm/lib/Target/AArch64/AArch64InstrInfo.td
  llvm/lib/Target/AArch64/AArch64SystemOperands.td
  llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
  llvm/lib/Target/AArch64/MCTargetDesc/AArch64InstPrinter.cpp
  llvm/lib/Target/ARM/ARM.td
  llvm/lib/Target/ARM/ARMInstrInfo.td
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/lib/Target/ARM/ARMPredicates.td
  llvm/test/MC/AArch64/arm64-system-encoding.s
  llvm/test/MC/AArch64/armv8.6a-fgt.s
  llvm/test/MC/AArch64/armv8.9a-clrbhb.s
  llvm/test/MC/AArch64/armv8.9a-prfm-slc.s
  llvm/test/MC/AArch64/armv8.9a-specres2-error.s
  llvm/test/MC/AArch64/armv8.9a-specres2.s
  llvm/test/MC/AArch64/basic-a64-diagnostics.s
  llvm/test/MC/AArch64/basic-a64-instructions.s
  llvm/test/MC/ARM/armv8.9a-clrbhb.s
  llvm/test/MC/Disassembler/AArch64/armv8.6a-fgt.txt
  llvm/test/MC/Disassembler/AArch64/armv8.9a-clrbhb.txt
  llvm/test/MC/Disassembler/AArch64/armv8.9a-prfm-slc.txt
  llvm/test/MC/Disassembler/AArch64/armv8.9a-specres2.txt
  llvm/test/MC/Disassembler/AArch64/basic-a64-instructions.txt
  llvm/test/MC/Disassembler/AArch64/mattr-all.txt
  llvm/test/MC/Disassembler/ARM/armv8.9a-clrbhb-arm.txt
  llvm/test/MC/Disassembler/ARM/armv8.9a-clrbhb-thumb.txt
  llvm/unittests/Support/TargetParserTest.cpp

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