[llvm] [IR] Allow uses of `llvm.global_ctors` and `llvm.global_dtors` (PR #96477)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

I'd rather not allow this, because this implies that we also have to lower such references to something meaningful, outside the pointer authentication use case.

Can you explain in more detail why these weird self-references are required?

https://github.com/llvm/llvm-project/pull/96477