That isn't true with all stack map implementations though: mature ones (such as ...

		pcwalton on May 13, 2014 \| parent \| context \| favorite \| on: Introducing the WebKit FTL JIT That isn't true with all stack map implementations though: mature ones (such as OCaml's IIRC) have the ability to track registers as well, eliminating the spilling requirement. But LLVM doesn't have support for this yet (although I'll be delighted if Azul lands their patches to implement it!)

Yes, I should clarify this is a limitation of LLVM's current gcroot design.