extract base class from method_compiler

to be used for blocks too

lib/risc/method_compiler.rb

@@ -4,25 +4,16 @@ module Risc
   # and to instantiate the methods correctly. Most of the init is typed layer stuff,
   # but there is some logic too.
 
-  # - risc_instructions: The sequence of risc level instructions that mom was compiled to
-  # - cpu_instructions: The sequence of cpu specific instructions that the
-  #                      risc_instructions was compiled to
-  #                 Instructions derive from class Instruction and form a linked list
-
-  class MethodCompiler
+  class MethodCompiler < CallableCompiler
 
     def initialize( method )
-      @regs = []
       @method = method
-      name = "#{method.self_type.name}.#{method.name}"
-      @risc_instructions = Risc.label(name, name)
-      @risc_instructions << Risc.label( name, "unreachable")
-      @current = @risc_instructions
-      @constants = []
-      @block_compilers = []
+      super()
     end
-    attr_reader :risc_instructions , :constants
 
+    def source_name
+      "#{@method.self_type.name}.#{@method.name}"
+    end
     def get_method
       @method
     end