Yes, I've already experimented with doing this, see: https://github.com/haberman/llvm-project/commit/e8d9c75bb35ce9c802f8eac522a2c6ce003f857f https://github.com

Yes, I've already experimented with doing this, see: https://github.com/haberman/llvm-project/commit/e8d9c75bb35ce9c802f8eac522a2c6ce003f857f https://github.com/haberman/llvm-project/commit/e8d9c75bb35c... But when I tried it on my actual code, the results weren't quite as good as I hoped, due to sub-optimal register allocation.