dart2js ssa: Avoid tracking too much in load elimination

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

 // Copyright (c) 2012, 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.
 
 part of ssa;
 
 class SsaFunctionCompiler implements FunctionCompiler {
   final SsaCodeGeneratorTask generator;
   final SsaBuilderTask builder;
   final SsaOptimizerTask optimizer;
@@ skipping 1079 matching lines @@
   SsaBuilder(JavaScriptBackend backend,
              CodegenWorkItem work,
              this.nativeEmitter,
              SourceInformationStrategy sourceInformationFactory)
     : this.compiler = backend.compiler,
       this.backend = backend,
       this.constantSystem = backend.constantSystem,
       this.work = work,
       this.rti = backend.rti,
       this.elements = work.resolutionTree {
+    graph.element = work.element;
     localsHandler = new LocalsHandler(this, work.element, null);
     sourceElementStack.add(work.element);
     sourceInformationBuilder =
         sourceInformationFactory.createBuilderForContext(
             work.element.implementation);
   }
 
   @override
   SemanticSendVisitor get sendVisitor => this;
 
@@ skipping 7829 matching lines @@
     if (unaliased is TypedefType) throw 'unable to unalias $type';
     unaliased.accept(this, builder);
   }
 
   void visitDynamicType(DynamicType type, SsaBuilder builder) {
     JavaScriptBackend backend = builder.compiler.backend;
     ClassElement cls = backend.findHelper('DynamicRuntimeType');
     builder.push(new HDynamicType(type, new TypeMask.exact(cls, classWorld)));
   }
 }