argName = (argName == null || argName.equals("")) ? "%_arg_array" : argName;
// You need at least required+opt+1 incoming args for the rest arg to get any args at all
// If it is going to get something, then it should ignore required+opt args from the beginning
// because they have been accounted for already.
s.addInstr(new ReceiveRestArgInstr19(s.getNewLocalVariable(argName, 0), argIndex, required, opt));
argIndex++;
}
// Post(-opt and rest) required args
ListNode postArgs = argsNode.getPost();