Build new IR for functions returning a constant

sdk/lib/_internal/compiler/implementation/elements/elements.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.
 
 library elements;
 
 
 import '../tree/tree.dart';
 import '../util/util.dart';
 import '../resolution/resolution.dart';
@@ skipping 10 matching lines @@
                                  Selector,
                                  Constant,
                                  Compiler;
 
 import '../dart_types.dart';
 
 import '../scanner/scannerlib.dart' show Token,
                                          isUserDefinableOperator,
                                          isMinusOperator;
 
+import '../ir/ir_nodes.dart' show IrNode;
+
 const int STATE_NOT_STARTED = 0;
 const int STATE_STARTED = 1;
 const int STATE_DONE = 2;
 
 class ElementCategory {
   /**
    * Represents things that we don't expect to find when looking in a
    * scope.
    */
   static const int NONE = 0;
@@ skipping 130 matching lines @@
 abstract class Element implements Spannable {
   String get name;
   ElementKind get kind;
   Modifiers get modifiers;
   Element get enclosingElement;
   Link<MetadataAnnotation> get metadata;
 
   Node parseNode(DiagnosticListener listener);
   DartType computeType(Compiler compiler);
 
+  bool hasIrNode(Compiler compiler);

[ngeoffray, 2013/11/20 14:55:27]

I wouldn't put those helpers here. If someone wants to know if an element has an
IR, it should ask the IR task.

[lukas, 2013/11/20 15:13:26]

It was suggested by Kasper:
https://codereview.chromium.org/57873002/diff/1/sdk/lib/_internal/compiler/im...

+  IrNode irNode(Compiler compiler);
+
   bool isFunction();
   bool isConstructor();
   bool isClosure();
   bool isMember();
   bool isInstanceMember();
 
   bool isFactoryConstructor();
   bool isGenerativeConstructor();
   bool isGenerativeConstructorBody();
   bool isCompilationUnit();
@@ skipping 787 matching lines @@
   int get resolutionState;
   Token get beginToken;
   Token get endToken;
 
   // TODO(kasperl): Try to get rid of these.
   void set annotatedElement(Element value);
   void set resolutionState(int value);
 
   MetadataAnnotation ensureResolved(Compiler compiler);
 }