Handle instance fields in compile_from_dill_test

pkg/compiler/lib/src/kernel/kernel_backend_strategy.dart

 // Copyright (c) 2017, 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.kernel.backend_strategy;
 
 import 'package:kernel/ast.dart' as ir;
 
 import '../backend_strategy.dart';
 import '../closure.dart';
 import '../common/codegen.dart' show CodegenRegistry, CodegenWorkItem;
 import '../common/tasks.dart';
 import '../compiler.dart';
 import '../elements/elements.dart' show JumpTarget;
 import '../elements/entities.dart';
 import '../elements/entity_utils.dart' as utils;
 import '../enqueue.dart';
 import '../io/source_information.dart';
 import '../js/js_source_mapping.dart';
 import '../js_backend/backend.dart';
 import '../js_backend/native_data.dart';
 import '../js_emitter/sorter.dart';
 import '../kernel/element_map.dart';
 import '../kernel/element_map_impl.dart';
 import '../native/behavior.dart';
+import '../options.dart';
 import '../ssa/builder_kernel.dart';
 import '../ssa/nodes.dart';
 import '../ssa/ssa.dart';
 import '../ssa/types.dart';
 import '../types/types.dart';
 import '../universe/selector.dart';
 import '../universe/world_builder.dart';
 import '../universe/world_impact.dart';
 import '../world.dart';
 import 'element_map_impl.dart';
@@ skipping 52 matching lines @@
   SourceInformationStrategy get sourceInformationStrategy =>
       const JavaScriptSourceInformationStrategy();
 }
 
 class KernelCodegenWorkItemBuilder implements WorkItemBuilder {
   final JavaScriptBackend _backend;
   final ClosedWorld _closedWorld;
 
   KernelCodegenWorkItemBuilder(this._backend, this._closedWorld);
 
+  CompilerOptions get _options => _backend.compiler.options;
+
   @override
   CodegenWorkItem createWorkItem(MemberEntity entity) {
+    // Codegen inlines field initializers. It only needs to generate
+    // code for checked setters.
+    if (entity.isField && entity.isInstanceMember) {
+      if (!_options.enableTypeAssertions || entity.enclosingClass.isClosure) {
+        return null;
+      }
+    }
+
     return new KernelCodegenWorkItem(_backend, _closedWorld, entity);
   }
 }
 
 class KernelCodegenWorkItem extends CodegenWorkItem {
   final JavaScriptBackend _backend;
   final ClosedWorld _closedWorld;
   final MemberEntity element;
   final CodegenRegistry registry;
 
@@ skipping 241 matching lines @@
   Iterable<ClassEntity> sortClasses(Iterable<ClassEntity> classes) {
     return classes.toList()
       ..sort((ClassEntity a, ClassEntity b) {
         int r = _compareLibraries(a.library, b.library);
         if (r != 0) return r;
         return _compareNodes(
             a, elementMap.getClassNode(a), b, elementMap.getClassNode(b));
       });
   }
 }