Lesser direct Compiler use in SSA

pkg/compiler/lib/src/ssa/graph_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import '../closure.dart';
 import '../constants/constant_system.dart';
 import '../common/codegen.dart' show CodegenRegistry;
 import '../common_elements.dart';
 import '../compiler.dart';
+import '../deferred_load.dart';
 import '../diagnostics/diagnostic_listener.dart';
 import '../elements/elements.dart';
 import '../elements/entities.dart' show Entity, Local;
 import '../elements/resolution_types.dart';
 import '../js_backend/backend_helpers.dart';
 import '../js_backend/backend_usage.dart';
 import '../js_backend/constant_handler_javascript.dart';
 import '../js_backend/js_backend.dart';
 import '../js_backend/native_data.dart';
 import '../js_backend/js_interop_analysis.dart';
@@ skipping 12 matching lines @@
 /// Base class for objects that build up an SSA graph.
 ///
 /// This contains helpers for building the graph and tracking information about
 /// the current state of the graph being built.
 abstract class GraphBuilder {
   /// Holds the resulting SSA graph.
   final HGraph graph = new HGraph();
 
   // TODO(het): remove this
   /// A reference to the compiler.
-  Compiler compiler;
+  Compiler get compiler;
 
   /// True if the builder is processing nodes inside a try statement. This is
   /// important for generating control flow out of a try block like returns or
   /// breaks.
   bool inTryStatement = false;
 
   /// The tree elements for the element being built into an SSA graph.
   TreeElements get elements;
 
   /// The JavaScript backend we are targeting in this compilation.
@@ skipping 35 matching lines @@
   BackendHelpers get helpers => backend.helpers;
 
   RuntimeTypesEncoder get rtiEncoder => backend.rtiEncoder;
 
   FunctionInlineCache get inlineCache => backend.inlineCache;
 
   MirrorsData get mirrorsData => backend.mirrorsData;
 
   JsInteropAnalysis get jsInteropAnalysis => backend.jsInteropAnalysis;
 
+  DeferredLoadTask get deferredLoadTask => compiler.deferredLoadTask;
+
+  Types get types => compiler.types;
+
   /// Used to track the locals while building the graph.
   LocalsHandler localsHandler;
 
   /// A stack of instructions.
   ///
   /// We build the SSA graph by simulating a stack machine.
   List<HInstruction> stack = <HInstruction>[];
 
   /// The count of nested loops we are currently building.
   ///
@@ skipping 165 matching lines @@
     open(newBlock);
   }
 
   HInstruction callSetRuntimeTypeInfo(
       HInstruction typeInfo, HInstruction newObject);
 
   /// The element for which this SSA builder is being used.
   Element get targetElement;
   TypeBuilder get typeBuilder;
 }