Hmm, I'm not a regular LLVM committer myself, but I think there's a chance. The history here has been several ports "for fun", so no one has tried to upstream

Hmm, I'm not a regular LLVM committer myself, but I think there's a chance. The history here has been several ports "for fun", so no one has tried to upstream anything. But if you have a real use case that could benefit from this, we should talk with the LLVM people and see. Feel free to file an issue and cc me and we'll find the right people.