L1_doCall

n,m - Send the message at index n in the compiledCode's literals. Pop the arguments for this message off the stack (the message itself knows how many to expect). The first argument was pushed first, and is the deepest on the stack. Use these arguments to look up the method dynamically. Before invoking the method, push nil onto the stack. Its presence will help distinguish continuations produced by the pushLabel instruction from their senders. When the call completes (if ever) by using an implicit return instruction, it will replace this nil with the result of the call.