I always wondered if there was a case to be made for a JIT that recompiled "normal" x86-64 into a restricted subset designed to be more optimizable. This could

I always wondered if there was a case to be made for a JIT that recompiled "normal" x86-64 into a restricted subset designed to be more optimizable. This could be paired with a sort of two-tiered processor design-- really fast on the restricted subset, but mediocre-to-bad performance on anything else. The code only has to activate the "mediocre to bad" paths long enough to build a JIT cache though,