[llvm-branch-commits] [llvm] [lit] Add lit.llvm.fn_extract: --param fn=NAMES prepends llvm-extract (PR #200351)

[Nikita Popov via llvm-branch-commits]

nikic wrote:

> @nikic — it allows one to filter by function name via `llvm-lit` instead of running the entire test suite of a file (in case there are too many functions); similar to #199147, which filters by RUN-line in `llvm-lit` to select a subset of CHECKs (in case there are too many RUN-lines).

I understand what it does, I don't understand *why* it does. What's the use case? Can you describe, based on an example, how this will be used?

https://github.com/llvm/llvm-project/pull/200351