[PATCH] D112420: [clang][ARM] PACBTI-M assembly support

[Ties Stuij via Phabricator via cfe-commits]

stuij created this revision.
Herald added subscribers: hiraditya, kristof.beyls.
stuij requested review of this revision.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

Introduce assembly support for Armv8.1-M PACBTI extension. This is an optional
extension in v8.1-M.

There are 10 new system registers and 5 new instructions, all predicated on the
feature.

The attribute for llvm-mc is called "pacbti". For armclang, an architecture
extension also called "pacbti" was created.

This patch is part of a series that adds support for the PACBTI-M extension of
the Armv8.1-M architecture, as detailed here:

https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension

The PACBTI-M specification can be found in the Armv8-M Architecture Reference
Manual:

https://developer.arm.com/documentation/ddi0553/latest

The following people contributed to this patch:

- Victor Campos
- Ties Stuij


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112420

Files:
  clang/test/Driver/armv8.1m.main.c
  llvm/include/llvm/Support/ARMTargetParser.def
  llvm/include/llvm/Support/ARMTargetParser.h
  llvm/lib/Target/ARM/ARM.td
  llvm/lib/Target/ARM/ARMInstrThumb2.td
  llvm/lib/Target/ARM/ARMPredicates.td
  llvm/lib/Target/ARM/ARMSubtarget.h
  llvm/lib/Target/ARM/ARMSystemRegister.td
  llvm/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
  llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
  llvm/test/MC/ARM/armv8.1m-pacbti-error.s
  llvm/test/MC/ARM/armv8.1m-pacbti.s
  llvm/test/MC/Disassembler/ARM/armv8.1m-pacbti.txt

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