[llvm] [TableGen] Rework error reporting for duplicate Feature/Processor. (PR #102257)

[Rahul Joshi via llvm-commits]

jurahul wrote:

> What if you use SMLoc from a record with smaller ID (that is use getID() as a tie breaker)?

I see. So ID seem to be assigned for each Record in the construction order, which I assume would also be the order in which the records were parsed, so we can use ID as a tie-breaker between First/Second in the code to determine which one was first seen by TableGen parser. Is that the idea?

https://github.com/llvm/llvm-project/pull/102257