[ic] Data handlers for loads of non-existent properties.

src/ic/handler-configuration-inl.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_IC_HANDLER_CONFIGURATION_INL_H_
 #define V8_IC_HANDLER_CONFIGURATION_INL_H_
 
 #include "src/ic/handler-configuration.h"
 
 #include "src/field-index-inl.h"
@@ skipping 22 matching lines @@
     Isolate* isolate, Handle<Object> smi_handler) {
   int config = Smi::cast(*smi_handler)->value();
 #ifdef DEBUG
   Kind kind = KindBits::decode(config);
   DCHECK(kind == kForFields || kind == kForConstants);
 #endif
   config = DoNegativeLookupOnReceiverBits::update(config, true);
   return handle(Smi::FromInt(config), isolate);
 }
 
+Handle<Object> LoadHandler::LoadNonExistent(
+    Isolate* isolate, bool do_negative_lookup_on_receiver) {
+  int config =
+      KindBits::encode(kForNonExistent) |
+      DoNegativeLookupOnReceiverBits::encode(do_negative_lookup_on_receiver);
+  return handle(Smi::FromInt(config), isolate);
+}
+
 Handle<Object> LoadHandler::LoadElement(Isolate* isolate,
                                         ElementsKind elements_kind,
                                         bool convert_hole_to_undefined,
                                         bool is_js_array) {
   int config = KindBits::encode(kForElements) |
                ElementsKindBits::encode(elements_kind) |
                ConvertHoleBits::encode(convert_hole_to_undefined) |
                IsJsArrayBits::encode(is_js_array);
   return handle(Smi::FromInt(config), isolate);
 }
@@ skipping 26 matching lines @@
                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
 
 #endif  // V8_IC_HANDLER_CONFIGURATION_INL_H_