cps-ir: Set runtime type information for new objects that require it.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index f6c7e21608b46c268c89575c9d7531f6141c63e8..6d1d199593a7447fbf31fcb35e0f56239cd480df 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -206,9 +206,10 @@ class CodeGenerator extends tree_ir.Visitor<dynamic, js.Expression> {
   @override
   js.Expression visitInvokeConstructor(tree_ir.InvokeConstructor node) {
     checkStaticTargetIsValid(node, node.target);
-
     if (node.constant != null) return giveup(node);
-    registry.registerInstantiatedClass(node.target.enclosingClass);
+
+    ClassElement instantiatedClass = node.target.enclosingClass;
+    registry.registerInstantiatedClass(instantiatedClass);
     Selector selector = node.selector;
     FunctionElement target = node.target;
     List<js.Expression> arguments = visitArguments(node.arguments);
@@ -501,8 +502,18 @@ class CodeGenerator extends tree_ir.Visitor<dynamic, js.Expression> {
   @override
   js.Expression visitCreateInstance(tree_ir.CreateInstance node) {
     registry.registerInstantiatedClass(node.classElement);
-    return new js.New(glue.constructorAccess(node.classElement),
-                      node.arguments.map(visitExpression).toList());
+    js.Expression instance = new js.New(
+        glue.constructorAccess(node.classElement),
+        node.arguments.map(visitExpression).toList());
+    if (node.typeInformation != null) {
+      FunctionElement helper = glue.getAddRuntimeTypeInformation();
+      js.Expression typeInformation = new js.ArrayInitializer(
+          node.typeInformation.map(visitExpression).toList());
+      return buildStaticHelperInvocation(helper,
+          <js.Expression>[instance, typeInformation]);
+    } else {
+      return instance;
+    }
   }
 
   @override
@@ -555,6 +566,12 @@ class CodeGenerator extends tree_ir.Visitor<dynamic, js.Expression> {
     }
   }
 
+  @override
+  js.Expression visitTypeExpression(tree_ir.TypeExpression node) {
+    List<js.Expression> arguments =
+        node.arguments.map(visitExpression).toList(growable: false);
+    return glue.generateTypeRepresentation(node.dartType, arguments);
+  }
 
   // Dart-specific IR nodes