Still crashity crashing

[Charles Oliver Nutter]

On Thu, Aug 6, 2009 at 9:35 AM, Rémi Forax<forax at univ-mlv.fr> wrote:
> You should try to cache the method handle in the DynamicMethod
> to reuse the same MH for several call sites.

Yeah, good call. I'll have to store it at Object, though, since we
want a single codebase to work for Java 5+. But caching it shouldn't
be hard.

> Speaking for what I am knowing, i.e
> without a special wildcard rule for inlining,
> It's working for bi-morphic call but after that
> local vtable (or selector table) implemented using table or
> lookup switch are more efficient.
>
> Something like:
> let receiverClass = receiver.getClass();
> switch(receiverClass.hashCode()) {
>    case 0x1345678:
>        return ...
>    case 0x678456:
>       // here there is a collision, very rare in practice, fallback to
> if..else
>       if (receiverClass == String.class) {
>
>        } else {
>
>        }
>     ...
> }

Yes, I'm sure there would be a failover point. I wonder how one could
do a switch using only method handles...perhaps there's a need for
another handle type that takes a table of values => target handles and
another handle to retrieve the switch argument?

> I wonder if tiered compilation is still an active project
> since Steve Goldman passed away.
> I know that someone new (I don't remember who)
> was in charge to this project but I haven't seen
> any news since.

I had heard it was still progressing, but very slowly. I hope new
resources appear soon to help move it along :(

- Charlie