stash old vm

moving on to getting mom to work and can’t have both
interpreter and elf broke, about 100 tests  went

stash/vm/method_compiler/field_access.rb

@@ -0,0 +1,27 @@
+module Vm
+  module FieldAccess
+
+    def on_FieldAccess statement
+#      receiver_ast , field_ast = *statement
+      receiver = process(statement.receiver)
+
+      type = receiver.type
+      if(type.is_a?(Symbol))
+        type = Parfait.object_space.get_class_by_name(type).instance_type
+      end
+      field_name = statement.field.name
+
+      index = type.variable_index(field_name)
+      raise "no such field:#{field_name} for class #{type.inspect}" unless index
+      value = use_reg(type.type_at(index))
+
+      add_slot_to_reg(statement , receiver , index, value)
+
+      value
+    end
+
+    def on_receiver expression
+      process expression.first
+    end
+  end
+end