Remove old post/pre inc/dec matchers.

lib/furnace-avm2/transform/nf_normalize.rb

@@ -6,7 +6,6 @@ class NFNormalize
       def transform(nf)
         @nf = nf
 
-        remove_useless_return
         visit @nf
 
         @nf
@@ -39,74 +38,6 @@ def on_r(node)
         end
       end
 
-      def remove_useless_return
-        if @nf.children.last.type == :return_void
-          @nf.children.slice! -1
-        end
-      end
-
-      LocalIncDecMatcher = AST::Matcher.new do
-        [ either_multi[
-            [:set_slot,  capture(:index), capture(:scope)],
-            [:set_local, capture(:index)],
-          ],
-          either[
-            [:convert, any,
-              capture(:inner)],
-            [:coerce, :any,
-              capture(:inner)],
-            capture(:inner)
-          ]
-        ]
-      end
-
-      LocalIncDecInnerMatcher = AST::Matcher.new do
-        [capture(:operator),
-          either[
-            [:convert, any,
-              capture(:getter)],
-            capture(:getter),
-          ]
-        ]
-      end
-
-      LocalIncDecGetterMatcher = AST::Matcher.new do
-        either[
-          [:get_slot,  backref(:index), backref(:scope)],
-          [:get_local, backref(:index)],
-        ]
-      end
-
-      IncDecOperators = [
-        :pre_increment, :post_increment,
-        :pre_decrement, :post_decrement
-      ]
-
-      def on_set_local(node)
-        captures = {}
-        if LocalIncDecMatcher.match(node, captures) &&
-              LocalIncDecInnerMatcher.match(captures[:inner], captures) &&
-              IncDecOperators.include?(captures[:operator])
-          if captures[:getter].is_a?(AST::Node) &&
-              LocalIncDecGetterMatcher.match(captures[:getter], captures)
-            if captures[:scope]
-              node.update(:"#{captures[:operator]}_slot", [ captures[:index], captures[:scope] ])
-            else
-              node.update(:"#{captures[:operator]}_local", [ captures[:index] ])
-            end
-          else
-            node.update(:add, [
-              AST::Node.new(:set_local, [
-                captures[:index],
-                captures[:getter]
-              ]),
-              AST::Node.new(:integer, [ 1 ])
-            ])
-          end
-        end
-      end
-      alias :on_set_slot :on_set_local
-
       ExpandedForInMatcher = AST::Matcher.new do
         [:if, [:has_next2, skip], skip]
       end