[llvm] [IR][AArch64] Add "ptrauth(...)" Constant to represent signed pointers. (PR #85738)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Not familiar with ptrauth, but this looks fine to me from an IR perspective. There should probably be an RFC on discourse for this addition though (unless it's already part of some general ptrauth RFC).

https://github.com/llvm/llvm-project/pull/85738