fix unconditional jump

and affected tests

lib/mom/instruction/instruction.rb

@@ -21,7 +21,7 @@ module Mom
     # The argument that is passed is a MethodCompiler, which has the method and some
     # state about registers used. (also provides helpers to generate risc instructions)
     def to_risc(compiler)
-      raise Risc::Label.new(self.class.name, self.class.name + "_todo")
+      raise self.class.name + "_todo"
     end
   end
 

lib/mom/instruction/jump.rb

@@ -1,6 +1,9 @@
 module Mom
 
-  # unconditional jump to the instruction given as target
+  # Unconditional jump to the Label given as target
+  # Eg used at the end of while or end of if_true branch
+  #
+  # Risc equivalent is the same really, called Unconditional there.
   #
   class Jump < Instruction
     attr_reader :target
@@ -8,8 +11,8 @@ module Mom
     def initialize(target)
       @target = target
     end
-    def to_risc(context)
-      Risc::Label.new(self,"Jump")
+    def to_risc(compiler)
+      Risc::Unconditional.new(self , @target.to_risc(compiler))
     end
   end
 

lib/risc/instructions/branch.rb

@@ -60,6 +60,11 @@ module Risc
       super(source , label)
     end
   end
+
+  class Unconditional < Branch
+
+  end
+
   class IsZero < Branch
   end