dart2js cps: Direct access on JS arrays.

pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart

Index: pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart
diff --git a/pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart b/pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart
index a6acceb4ca7e5e2b9977002194e75ffd7c59a4a8..1820f1d8af16a6a235c748810d60483ed345a350 100644
--- a/pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart
+++ b/pkg/compiler/lib/src/tree_ir/optimization/pull_into_initializers.dart
@@ -315,6 +315,24 @@ class PullIntoInitializers extends RecursiveTransformer
     return node;
   }
 
+  Expression visitGetLength(GetLength node) {
+    super.visitGetLength(node);
+    ++impureCounter;
+    return node;
+  }
+
+  Expression visitGetIndex(GetIndex node) {
+    super.visitGetIndex(node);
+    ++impureCounter;
+    return node;
+  }
+
+  Expression visitSetIndex(SetIndex node) {
+    super.visitSetIndex(node);
+    ++impureCounter;
+    return node;
+  }
+
   void visitInnerFunction(FunctionDefinition node) {
     new PullIntoInitializers().rewrite(node);
   }