Sure, but AFAIK many/most of the "supports Javascript" languages out there rely on emscripten, so LLVM is involved anyway. By its nature, LLVM gives you more flexibility in the long term than VMs that were intended as a final destination.
> Sure, but AFAIK many/most of the "supports Javascript" languages out there rely on emscripten, so LLVM is involved anyway.
Yes, yes. LLVM definitely helps here. But it doesn't come "for free", which is what the GP post asked. You still need some "glue" code to make it work.
