Answer a full fledged CompiledMethod. Construct the method
header from the parameters, and set the literals and bytecodes
to the provided ones. Also, the bytecodes are optimized and
any embedded CompiledBlocks modified to refer to these literals
and to the newly created CompiledMethod.
numArgs: args
Create a user-defined method (one that is sent
#valueWithReceiver:withArguments: when it is invoked)
with numArgs arguments. This only makes sense when
called for a subclass of CompiledMethod.