unifying register comstants

were in several files with different names
many files touched, but just renames

lib/virtual/compiled_method_info.rb

@@ -70,7 +70,7 @@ module Virtual
     def locals_at l_block
       used =[]
       # call assigns the return register, but as it is in l_block, it is not asked.
-      assigned = [ RegisterReference.new(Virtual::RegisterMachine.instance.return_register) ]
+      assigned = [ Register::RegisterReference.new(Virtual::RegisterMachine.instance.return_register) ]
       l_block.reachable.each do |b|
         b.uses.each {|u|
           (used << u) unless assigned.include?(u)

lib/virtual/compiler/function_expression.rb

@@ -36,7 +36,7 @@ module Virtual
       locals = {}
       expression.params.each_with_index do |param , index|
         arg = param.name
-        register = RegisterReference.new(RegisterMachine.instance.receiver_register).next_reg_use(index + 1)
+        register = Register::RegisterReference.new(RegisterMachine.instance.receiver_register).next_reg_use(index + 1)
         arg_value = Integer.new(register)
         locals[arg] = arg_value
         args << arg_value

lib/virtual/message.rb

@@ -23,13 +23,6 @@ module Virtual
 
   class Message
 
-    SELF_REG = :r0
-    MESSAGE_REG = :r1
-    FRAME_REG = :r2
-    NEW_MESSAGE_REG = :r3
-
-    TMP_REG = :r4
-
     def initialize me , normal , exceptional
       @me = me
       @next_normal = normal

lib/virtual/passes/enter_implementation.rb

@@ -7,7 +7,7 @@ module Virtual
         new_codes = []
         # save return register and create a new frame
         # lr is link register, ie where arm stores the return address when call is issued
-        new_codes << Register::SaveReturn.new( Virtual::Slot::MESSAGE_REGISTER , Virtual::RETURN_INDEX )
+        new_codes << Register::SaveReturn.new( Register::RegisterReference.message_reg , Virtual::RETURN_INDEX )
         new_codes << Virtual::NewFrame.new
         block.replace(code , new_codes )
       end

lib/virtual/slots/slot.rb

@@ -16,10 +16,6 @@ module Virtual
   # Names for the slots avoid indexes
 
   class Slot < Object
-    MESSAGE_REGISTER = :r0
-    SELF_REGISTER = :r1
-    FRAME_REGISTER = :r2
-    NEW_MESSAGE_REGISTER = :r3
 
     attr_accessor :index , :type , :value