[ic] Support data handlers that represent simple field stores.

src/ic/handler-configuration-inl.h

Index: src/ic/handler-configuration-inl.h
diff --git a/src/ic/handler-configuration-inl.h b/src/ic/handler-configuration-inl.h
index 7e7eec4f156ca12444d1677559615be3fde854ed..832a5e4f7abc9e96700e8895ce9fd54007a404e9 100644
--- a/src/ic/handler-configuration-inl.h
+++ b/src/ic/handler-configuration-inl.h
@@ -40,6 +40,37 @@ Handle<Object> LoadHandler::LoadElement(Isolate* isolate,
   return handle(Smi::FromInt(config), isolate);
 }
 
+Handle<Object> StoreHandler::StoreField(Isolate* isolate, int descriptor,
+                                        FieldIndex field_index,
+                                        Representation representation) {
+  StoreHandler::FieldRepresentation field_rep;
+  switch (representation.kind()) {
+    case Representation::kSmi:
+      field_rep = StoreHandler::kSmi;
+      break;
+    case Representation::kDouble:
+      field_rep = StoreHandler::kDouble;
+      break;
+    case Representation::kHeapObject:
+      field_rep = StoreHandler::kHeapObject;
+      break;
+    case Representation::kTagged:
+      field_rep = StoreHandler::kTagged;
+      break;
+    default:
+      UNREACHABLE();
+      return Handle<Object>::null();
+  }
+  int value_index = DescriptorArray::ToValueIndex(descriptor);
+
+  int config = StoreHandler::KindBits::encode(StoreHandler::kForFields) |
+               StoreHandler::IsInobjectBits::encode(field_index.is_inobject()) |
+               StoreHandler::FieldRepresentationBits::encode(field_rep) |
+               StoreHandler::DescriptorValueIndexBits::encode(value_index) |
+               StoreHandler::FieldOffsetBits::encode(field_index.offset());
+  return handle(Smi::FromInt(config), isolate);
+}
+
 }  // namespace internal
 }  // namespace v8