fix div4 and tests

also bug in reduce_int, compiler not carried through

lib/risc/register_value.rb

@@ -71,7 +71,7 @@ module Risc
     def reduce_int(check = true)
       raise "type not int #{type.name}" if check && type.name != "Integer_Type"
       new_name = "#{@symbol}.data_1"
-      new_reg = RegisterValue.new( new_name.to_sym , :Integer , extra)
+      new_reg = RegisterValue.new( new_name.to_sym , :Integer , extra).set_compiler(compiler)
       reduce = Risc::SlotToReg.new( "int -> fix" , self , Parfait::Integer.integer_index , new_reg)
       compiler.add_code(reduce) if compiler
       reduce.register

lib/slot_machine/macro/div4.rb

@@ -3,10 +3,11 @@ module SlotMachine
     def to_risc(compiler)
       builder = compiler.builder(compiler.source)
       integer_tmp = builder.allocate_int
+      integer_1 = builder.register( :integer_1 )
+      integer_self = builder.register( :integer_self )
       builder.build do
-        integer_self! << message[:receiver]
-        integer_self.reduce_int
-        integer_1! << 2
+        integer_self = message[:receiver].to_reg.reduce_int(false)
+        load_object( 2 , integer_1)
         integer_self.op :>> , integer_1
         integer_tmp[Parfait::Integer.integer_index] << integer_self
         message[:return_value] << integer_tmp