[PATCH] D49786: Enable some pointer authentication instructions for aarch64 v8a targets

[Luke Cheeseman via Phabricator via llvm-commits]

LukeCheeseman created this revision.
Herald added a reviewer: javed.absar.
Herald added subscribers: llvm-commits, kristof.beyls.

- Some of the v8.3 pointer authentication instruction inhabit the Hint space
- These instructions can be assembled to hint instructions which act as NOP instructions prior to v8.3
- This patch permits using the hint instructions for all v8a targets


Repository:
  rL LLVM

https://reviews.llvm.org/D49786

Files:
  lib/Target/AArch64/AArch64InstrInfo.td
  test/MC/AArch64/armv8.3a-signed-pointer.s

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