Assignment expressions in tree IR.

pkg/compiler/lib/src/dart_backend/backend.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 dart_backend;
 
 // TODO(ahe): This class is simply wrong.  This backend should use
 // elements when it can, not AST nodes.  Perhaps a [Map<Element,
 // TreeElements>] is what is needed.
 class ElementAst {
@@ skipping 164 matching lines @@
     context.traceGraph('Tree builder', treeRoot);
     assert(checkTreeIntegrity(treeRoot));
 
     // Transformations on the Tree IR.
     void applyTreePass(tree_opt.Pass pass) {
       pass.rewrite(treeRoot);
       context.traceGraph(pass.passName, treeRoot);
       assert(checkTreeIntegrity(treeRoot));
     }
 
-    applyTreePass(new StatementRewriter());
+    applyTreePass(new StatementRewriter(isDartMode: true));
     applyTreePass(new VariableMerger());
     applyTreePass(new LoopRewriter());
     applyTreePass(new LogicalRewriter());
+    applyTreePass(new PullIntoInitializers());
 
     // Backend-specific transformations.
     new backend_ast_emitter.UnshadowParameters().unshadow(treeRoot);
     context.traceGraph('Unshadow parameters', treeRoot);
 
     TreeElementMapping treeElements = new TreeElementMapping(element);
-    backend_ast.RootNode backendAst =
-        backend_ast_emitter.emit(treeRoot);
+    backend_ast.RootNode backendAst = backend_ast_emitter.emit(treeRoot);
     Node frontend_ast = backend2frontend.emit(treeElements, backendAst);
     return new ElementAst(frontend_ast, treeElements);
 
   }
 
   /**
    * Tells whether we should output given element. Corelib classes like
    * Object should not be in the resulting code.
    */
   @override
@@ skipping 349 matching lines @@
   }
 
   void traceGraph(String title, var irObject) {
     compiler.tracer.traceGraph(title, irObject);
   }
 
   DartTypes get dartTypes => compiler.types;
 
   InternalErrorFunction get internalError => compiler.internalError;
 }