review request (L): 6939224 MethodHandle.invokeGeneric needs to perform the correct set of conversions

[john.r.rose at oracle.com]

There is no up-call. The JVM just tail-calls an adapter previously prepared by the JDK runtime. So the interpreter has no special paths other than the slow path with the tail call. 

I think your implementation put the adapter on a method header. I put it on the method type family (the "form"). 

-- John  (on my iPhone)

On Sep 13, 2010, at 3:05 AM, Fredrik Öhrström <oehrstroem at gmail.com> wrote:

> Why do an upcall to Java? The conversions should be so simple that it
> should be possible to handle them in the interpreter.