llvm-project

9d06e087 - [Clang] [NFC] Introduce a helper for emitting compatibility diagnostics (#132348)

[Clang] [NFC] Introduce a helper for emitting compatibility diagnostics (#132348) This is a follow-up to #132129. Currently, only `Parser` and `SemaBase` get a `DiagCompat()` helper; I’m planning to keep refactoring compatibility warnings and add more helpers to other classes as needed. I also refactored a single parser compat warning just to make sure everything works properly when diagnostics across multiple components (i.e. Sema and Parser in this case) are involved.