Add J-elements

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';
@@ skipping 62 matching lines @@
   @override
   CodegenWorldBuilder createCodegenWorldBuilder(
       NativeBasicData nativeBasicData,
       ClosedWorld closedWorld,
       SelectorConstraintsStrategy selectorConstraintsStrategy) {
     return new KernelCodegenWorldBuilder(closedWorld.elementEnvironment,
         nativeBasicData, closedWorld, selectorConstraintsStrategy);
   }
 
   @override
-  SsaBuilderTask createSsaBuilderTask(JavaScriptBackend backend,
+  SsaBuilder createSsaBuilder(CompilerTask task, JavaScriptBackend backend,
       SourceInformationStrategy sourceInformationStrategy) {
-    return new KernelSsaBuilderTask(backend.compiler);
+    KernelFrontEndStrategy strategy = backend.compiler.frontendStrategy;
+    KernelToElementMap elementMap = strategy.elementMap;
+    return new KernelSsaBuilder(task, backend.compiler, elementMap);
   }
 
   @override
   SourceInformationStrategy get sourceInformationStrategy =>
       const JavaScriptSourceInformationStrategy();
 }
 
 class KernelCodegenWorkItemBuilder implements WorkItemBuilder {
   final JavaScriptBackend _backend;
   final ClosedWorld _closedWorld;
@@ skipping 25 matching lines @@
   KernelCodegenWorkItem(this._backend, this._closedWorld, this.element)
       : registry = new CodegenRegistry(element);
 
   @override
   WorldImpact run() {
     return _backend.codegen(this, _closedWorld);
   }
 }
 
 /// Task for building SSA from kernel IR loaded from .dill.
-class KernelSsaBuilderTask extends CompilerTask implements SsaBuilderTask {
+class KernelSsaBuilder implements SsaBuilder {
+  final CompilerTask task;
   final Compiler _compiler;
+  final KernelToElementMap _elementMap;
 
-  KernelSsaBuilderTask(this._compiler) : super(_compiler.measurer);
-
-  KernelToElementMapImpl get _elementMap {
-    KernelFrontEndStrategy frontendStrategy = _compiler.frontendStrategy;
-    return frontendStrategy.elementMap;
-  }
+  KernelSsaBuilder(this.task, this._compiler, this._elementMap);
 
   @override
   HGraph build(CodegenWorkItem work, ClosedWorld closedWorld) {
-    KernelSsaBuilder builder = new KernelSsaBuilder(
+    KernelSsaGraphBuilder builder = new KernelSsaGraphBuilder(
         work.element,
         work.element.enclosingClass,
         _elementMap.getMemberNode(work.element),
         _compiler,
         _elementMap,
         new KernelToTypeInferenceMapImpl(closedWorld),
         new KernelToLocalsMapImpl(work.element),
         closedWorld,
         _compiler.codegenWorldBuilder,
         work.registry,
@@ skipping 223 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));
       });
   }
 }