[clang] [llvm] [clang][Modules][serialization] Deduplicate source location entries across loaded modules (PR #209795)

[Ayokunle Amodu via cfe-commits]

ayokunle321 wrote:

> Yeah, I am trying to test this with our internal workloads again. I am trying to make this happen in two weeks.

Thanks! Just noting that this is different from the inverse map crash fix, so you can pull the latest changes if you have not :)

https://github.com/llvm/llvm-project/pull/209795