Build new IR for functions returning a constant

sdk/lib/_internal/compiler/implementation/elements/modelx.dart

Index: sdk/lib/_internal/compiler/implementation/elements/modelx.dart
diff --git a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
index 56a35e9bc2e87b07d7ae1916a9e52fb591952850..8e3e238eaf7d596f87072417b3fff01e65e9e40e 100644
--- a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
+++ b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
@@ -7,6 +7,7 @@ library elements.modelx;
 import 'elements.dart';
 import '../../compiler.dart' as api;
 import '../tree/tree.dart';
+import '../ir/ir.dart' show IFunction;
 import '../util/util.dart';
 import '../resolution/resolution.dart';
 
@@ -1527,6 +1528,9 @@ class FunctionElementX extends ElementX implements FunctionElement {
     if (super.isAbstract(compiler)) return true;
     if (modifiers.isExternal()) return false;
     if (isFunction() || isAccessor()) {
+      if (compiler.irBuilder.iNodes.containsKey(this)) {

[kasperl, 2013/11/06 08:30:04]

How bad would it be to refer to the IR nodes directly from FunctionElements? If
nothing else, I'd add a couple of helpers -- one to ask if we have IR for a
FunctionElement and one to fetch the IR.

[lukas, 2013/11/06 11:36:08]

Done.

+        return !(compiler.irBuilder.iNodes[this] as IFunction).hasBody();
+      }
       return compiler.withCurrentElement(this,
           () => !parseNode(compiler).hasBody());

[ngeoffray, 2013/11/05 12:58:35]

We should make sure we don't do this.

[lukas, 2013/11/06 11:36:08]

Done.

     }