cpsir: add support for deferred code

pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart
index 76b2d22836b48fcda12ea0bdc3d66493d1bc2bfb..c6783b52c910011c54205d592c3c7e8f65d6d2b9 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder.dart
@@ -1055,9 +1055,18 @@ class IrBuilder {
   /// Create a getter invocation of the static [getter].
   ir.Primitive buildStaticGetterGet(MethodElement getter,
                                     SourceInformation sourceInformation) {
-    Selector selector = new Selector.getter(getter.memberName);
-    return _buildInvokeStatic(
-        getter, selector, const <ir.Primitive>[], sourceInformation);
+    if (getter.isDeferredLoaderGetter) {
+      PrefixElement prefix = getter.enclosingElement;
+      ir.Primitive loadId =
+          buildStringConstant(program.getImportDeferName(prefix));
+      return buildStaticFunctionInvocation(program.loadLibraryFunction,
+          CallStructure.ONE_ARG, <ir.Primitive>[loadId],
+          sourceInformation: sourceInformation);
+    } else {
+      Selector selector = new Selector.getter(getter.memberName);
+      return _buildInvokeStatic(
+          getter, selector, const <ir.Primitive>[], sourceInformation);
+    }
   }
 
   /// Create a read access of the static [function], i.e. a closurization of