[LLVMdev] Accurate garbage collection

[lost]

Hello!

I'm looking at "Overview of available features" here:
http://llvm.org/docs/GarbageCollection.html#collector-algos and can't
understand something.
First, does table header mean that there are already some GC's
implemented besides "shadow stack"? E.g. can I just use them?
Second, does row "JIT", "NO" mean that GC is not compatible with jitting at all?

Best regards,
Victor Milovanov.