…ce()

… support more easily

…w configurable from ruby-land

…rifying AST rewriting to de-super()

…r w/o args

…nstance

…orking

… fallback.

Also some misc cleanup

…ed fixes

execution.  The goal will be to split execution before and after a super
instruction.  The arguments to the super call will be retrieve'able which
from Java can end up calling a java ctor.

This also adds a new flag uses_super which just makes it simple for us to
know the initialize method contains a super.  The intent is initialize methods
in Java proxy classes without super will just not use this special interpreter.

context via IRMethod.builtInterperterContextForJavaConstructor().  If this
is and ExitableInterpreterEngine then we can split execute the method.

At that point we need to ask for ic.getEngineState() and then call
ExitableInterpreterEngine.interpret().  That method will execute up to the
super instr and return a RubyArray of the arguments to the super call.  At
this point we should convert those values for Java CTOR and execute it.  Once
finished we will then just call interpret() again.  The interpreter will then
continue executing at one instr past the original super instr.

So the above description still needs to exist in RubyClass vs the AST stuff
it is doing now.

There is another small problem that this is a startup interpreter of sorts
and this method will still try and promote to being a FULL/JIT method.  We
need to either disable that or possibly automatically convert this to be a
full interpreter (but still disable JIT compilation).

This looks for jump targets and labels.  A label is where we will jump
to.  jumptargets are places which will move to a label.  If we run into
a jump target we need to just notice whether the jump will move forward
past the super call or jump backwards to before the super call.  All
the other jumps should be fine.

From a purely what could we support this is a bit restrictive.  There
are cases where we could support all paths of an if/else where both
branches are guaranteed to call super.  This should be allowed but this
analysis requires flow analysis and the current version is too simple to
support it.  Future work can add this.

This reverts commit 3b181d8.

…nstance

…, fix negative super looping

Fixes vararg dispatch