[clang] [llvm] [X86] Enhance kCFI type IDs with a 3-bit arity indicator. (PR #117121)

[Scott Constable via llvm-commits]

scottconstable wrote:

@phoebewang @sirmc @samitolvanen @Darksonn @lvwr @ojeda @maurer @rcvalle @MaskRay

I have created https://github.com/llvm/llvm-project/pull/121070 to implement the alternate proposal summarized in this comment above: https://github.com/llvm/llvm-project/pull/117121#issuecomment-2518240999.

https://github.com/llvm/llvm-project/pull/117121