What is the update on the AVR backend integration for the 3.9 release?

Checking out https://reviews.llvm.org/ for the present status of AVR integration, the latest commit for review is dated Jun 29. So it seems there is till integration happening. However I don’t even see any honorable mention in the draft release as for progress. The progress at least should get 3-4 sentences in the release notes!
What is the present status/percent integrated ? And will there be an experimental testing with the 3.9 version or least from the bleeding edge git before 4.0 ? Thanks Dlyan and the llvm team / reviewers for the hard work.

Hey Allen,

Yeah, there is still quite a bit of stuff to go. The backend isn’t quite yet in a state where things can actually be compiled just yet. The biggest issue is finding code reviewers (Matt A has been doing most of them, props to him).

And will there be an experimental testing with the 3.9 version

I doubt it. There aren’t any compile errors, but there are a few undefined symbols while linking as of now. It can’t really be used just yet.