named the first intruction constructor argument

lib/vm/instruction.rb

@@ -25,7 +25,8 @@ module Vm
     # Make hash attributes to object attributes
     include Support::HashAttributes
     
-    def initialize options
+    def initialize left , options
+      @left = left
       @attributes = options
     end
   end
@@ -43,7 +44,7 @@ module Vm
   class MoveInstruction < Instruction
   end
   class CallInstruction < Instruction
-    def initialize options
+    def initialize left , options
       super
       opcode = @attributes[:opcode].to_s
       if opcode.length == 3 and opcode[0] == "b"