[all-commits] [llvm/llvm-project] f903c8: [AArch64] Emit .cfi_negate_ra_state for PAC-auth i...

[Dani via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f903c8505515f15e956febbd8cdfa0037fbaf689
      https://github.com/llvm/llvm-project/commit/f903c8505515f15e956febbd8cdfa0037fbaf689
  Author: Daniel Kiss <daniel.kiss at arm.com>
  Date:   2021-10-20 (Wed, 20 Oct 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-cfi.ll
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-regsave.mir
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-sp-mod.mir
    M llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-thunk.ll
    M llvm/test/CodeGen/AArch64/sign-return-address.ll

  Log Message:
  -----------
  [AArch64] Emit .cfi_negate_ra_state for PAC-auth instructions.

autiasp, autibsp instructions are the counterpart of paciasp/pacibsp instructions
therefore let's emit .cfi_negate_ra_state for these too.
In case of Armv8.3 instruction set the retaa/retbb will do the return and authentication
in one step here we can't emit the . cfi_negate_ra_state because that would be point after
the ret* instruction.

Reviewed By: nickdesaulniers, MaskRay

Differential Revision: https://reviews.llvm.org/D111780