[turbofan] Add support for CreateIterResultObject.

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index 739ba91d6fb7b3e97e92d9eebd015a5a256488a1..96d2ae95574d58025fc4f3fcf32542145cd227f6 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -37,6 +37,8 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
   switch (f->function_id) {
     case Runtime::kInlineConstructDouble:
       return ReduceConstructDouble(node);
+    case Runtime::kInlineCreateIterResultObject:
+      return ReduceCreateIterResultObject(node);
     case Runtime::kInlineDateField:
       return ReduceDateField(node);
     case Runtime::kInlineDeoptimizeNow:
@@ -116,6 +118,16 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
 }
 
 
+Reduction JSIntrinsicLowering::ReduceCreateIterResultObject(Node* node) {
+  Node* const value = NodeProperties::GetValueInput(node, 0);
+  Node* const done = NodeProperties::GetValueInput(node, 1);
+  Node* const context = NodeProperties::GetContextInput(node);
+  Node* const effect = NodeProperties::GetEffectInput(node);
+  return Change(node, javascript()->CreateIterResultObject(), value, done,
+                context, effect);
+}
+
+
 Reduction JSIntrinsicLowering::ReduceConstructDouble(Node* node) {
   Node* high = NodeProperties::GetValueInput(node, 0);
   Node* low = NodeProperties::GetValueInput(node, 1);