cpsir: add support for deferred code

pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart

 // Copyright (c) 2013, 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.
 
 library dart2js.ir_builder;
 
 import '../closure.dart' hide ClosureScope;
 import '../common.dart';
 import '../common/names.dart' show
     Names,
@@ skipping 1037 matching lines @@
   /// Create a read access of a static [field] that might not have been
   /// initialized yet.
   ir.Primitive buildStaticFieldLazyGet(FieldElement field,
                                        SourceInformation sourceInformation) {
     return addPrimitive(new ir.GetLazyStatic(field, sourceInformation));
   }
 
   /// Create a getter invocation of the static [getter].
   ir.Primitive buildStaticGetterGet(MethodElement getter,
                                     SourceInformation sourceInformation) {
-    Selector selector = new Selector.getter(getter.memberName);
-    return _buildInvokeStatic(
-        getter, selector, const <ir.Primitive>[], sourceInformation);
+    if (getter.isDeferredLoaderGetter) {
+      PrefixElement prefix = getter.enclosingElement;
+      ir.Primitive loadId =
+          buildStringConstant(program.getImportDeferName(prefix));
+      return buildStaticFunctionInvocation(program.loadLibraryFunction,
+          CallStructure.ONE_ARG, <ir.Primitive>[loadId],
+          sourceInformation: sourceInformation);
+    } else {
+      Selector selector = new Selector.getter(getter.memberName);
+      return _buildInvokeStatic(
+          getter, selector, const <ir.Primitive>[], sourceInformation);
+    }
   }
 
   /// Create a read access of the static [function], i.e. a closurization of
   /// [function].
   ir.Primitive buildStaticFunctionGet(MethodElement function,
                                       {SourceInformation sourceInformation}) {
     return addPrimitive(new ir.GetStatic(function, sourceInformation));
   }
 
   /// Create a write access to the static [field] with the [value].
@@ skipping 1845 matching lines @@
 }
 
 class SwitchCaseInfo {
   final List<ir.Primitive> constants = <ir.Primitive>[];
   final SubbuildFunction buildBody;
 
   SwitchCaseInfo(this.buildBody);
 
   void addConstant(ir.Primitive constant) => constants.add(constant);
 }