[llvm] [LLVM][DebugInfo]Allow ExtraData field to be a node reference (PR #165023)

[Vladislav Dzhidzhoev via llvm-commits]

https://github.com/dzhidzhoev commented:

> I think I'd feel slightly better about it if verifier checks could be added?

Having a Verifier check would be nice.

https://github.com/llvm/llvm-project/pull/165023