Looking for LLVM-based language which allows to reload part of binary on-the-fly

Are the any GIL-less LLVM-based languages, targeted mainly for JIT-execution which allows to reload PART of the code on the fly?

Like re-compile 1 class, and reload it without stopping the whole program.

Anyone tryed that?

Any chance on doing that with clang (surely, with great deal of developers caution, restriction and manual state handling)?