[keyed-store-generic] Update protectors if needed

src/code-stub-assembler.cc

 // 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.
 #include "src/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 5778 matching lines @@
                                        Node* slot_id) {
   // This method is used for binary op and compare feedback. These
   // vector nodes are initialized with a smi 0, so we can simply OR
   // our new feedback in place.
   Node* previous_feedback = LoadFixedArrayElement(feedback_vector, slot_id);
   Node* combined_feedback = SmiOr(previous_feedback, feedback);
   StoreFixedArrayElement(feedback_vector, slot_id, combined_feedback,
                          SKIP_WRITE_BARRIER);
 }
 
+void CodeStubAssembler::CheckForAssociatedProtector(Node* name,
+                                                    Label* if_protector) {
+  // This list must be kept in sync with LookupIterator::UpdateProtector!
+  // TODO(jkummerow): Would it be faster to have a bit in Symbol::flags()?
+  GotoIf(WordEqual(name, LoadRoot(Heap::kconstructor_stringRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kiterator_symbolRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kspecies_symbolRootIndex)),
+         if_protector);
+  GotoIf(WordEqual(name, LoadRoot(Heap::kis_concat_spreadable_symbolRootIndex)),
+         if_protector);
+  // Fall through if no case matched.
+}
+
 Node* CodeStubAssembler::LoadReceiverMap(Node* receiver) {
   return Select(TaggedIsSmi(receiver),
                 [=] { return LoadRoot(Heap::kHeapNumberMapRootIndex); },
                 [=] { return LoadMap(receiver); },
                 MachineRepresentation::kTagged);
 }
 
 Node* CodeStubAssembler::TryToIntptr(Node* key, Label* miss) {
   VARIABLE(var_intptr_key, MachineType::PointerRepresentation());
   Label done(this, &var_intptr_key), key_is_smi(this);
@@ skipping 2781 matching lines @@
         formatted.c_str(), TENURED);
     CallRuntime(Runtime::kGlobalPrint, NoContextConstant(),
                 HeapConstant(string));
   }
   CallRuntime(Runtime::kDebugPrint, NoContextConstant(), tagged_value);
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8