move to parfait integers in risc layer

loading constants means loading parfait objects
objects have to me collected in machine
integer ok, string/true/false/nil next

lib/mom/instruction/basic_values.rb

@@ -10,6 +10,11 @@ module Mom
     def initialize(value)
       @value = value
     end
+    def to_parfait(compiler)
+      value = Parfait::Integer.new(@value)
+      compiler.add_constant(value)
+      value
+    end
     def ct_type
       Parfait.object_space.get_class_by_name(:Integer).instance_type
     end

lib/mom/instruction/slot_load.rb

@@ -108,7 +108,11 @@ module Mom
       type = known_object.respond_to?(:ct_type) ? known_object.ct_type : :int
       right = compiler.use_reg( type )
       case known_object
-      when Constant , Parfait::Object , Risc::Label
+      when Constant
+        parfait = known_object.to_parfait(compiler)
+        const  = Risc.load_constant(instruction, parfait , right)
+        raise "Can't have slots into Constants" if slots.length > 0
+      when Parfait::Object , Risc::Label
         const  = Risc.load_constant(instruction, known_object , right)
         if slots.length > 0
           # desctructively replace the existing value to be loaded if more slots