[llvm] [DLCov 3/5] Implement DebugLoc origin-tracking (PR #107369)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

> Should these older PRs be closed? It seems like they've been replaced by a new PR stack starting with #143590.

Correct - I've just been twiddling with the new PRs since I opened them (while getting the hang of graphite!), but this and the other open PR have been split into a set of patches based on the latest main - please feel free to carry any unanswered comments over!

https://github.com/llvm/llvm-project/pull/107369