handle the special snowflakes that are Integer Indexed Exotic objects

src/ic/ic.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 244 matching lines @@
         break;
       }
       case LookupIterator::ACCESS_CHECK:
         // PropertyHandlerCompiler::CheckPrototypes() knows how to emit
         // access checks for global proxies.
         if (it->GetHolder<JSObject>()->IsJSGlobalProxy() && it->HasAccess()) {
           break;
         }
         return;
       case LookupIterator::ACCESSOR:
+      case LookupIterator::INTEGER_INDEXED_EXOTIC:
       case LookupIterator::DATA:
         return;
     }
   }
 }
 
 
 bool IC::TryRemoveInvalidPrototypeDependentStub(Handle<Object> receiver,
                                                 Handle<String> name) {
   if (!IsNameCompatibleWithPrototypeFailure(name)) return false;
@@ skipping 1034 matching lines @@
       DCHECK(lookup->property_details().type() == DATA_CONSTANT);
       if (receiver_is_holder) {
         LoadConstantStub stub(isolate(), lookup->GetConstantIndex());
         return stub.GetCode();
       }
       NamedLoadHandlerCompiler compiler(isolate(), map, holder, cache_holder);
       return compiler.CompileLoadConstant(lookup->name(),
                                           lookup->GetConstantIndex());
     }
 
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
+      return slow_stub();
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
     case LookupIterator::TRANSITION:
       UNREACHABLE();
   }
 
   return slow_stub();
 }
 
@@ skipping 170 matching lines @@
                    !info->query()->IsUndefined()) {
           return false;
         }
         break;
       }
       case LookupIterator::ACCESS_CHECK:
         if (it->GetHolder<JSObject>()->IsAccessCheckNeeded()) return false;
         break;
       case LookupIterator::ACCESSOR:
         return !it->IsReadOnly();
+      case LookupIterator::INTEGER_INDEXED_EXOTIC:
+        return false;
       case LookupIterator::DATA: {
         if (it->IsReadOnly()) return false;
         Handle<JSObject> holder = it->GetHolder<JSObject>();
         if (receiver.is_identical_to(holder)) {
           it->PrepareForDataProperty(value);
           // The previous receiver map might just have been deprecated,
           // so reload it.
           update_receiver_map(receiver);
           return true;
         }
 
         // Receiver != holder.
         PrototypeIterator iter(it->isolate(), receiver);
         if (receiver->IsJSGlobalProxy()) {
           return it->GetHolder<Object>().is_identical_to(
               PrototypeIterator::GetCurrent(iter));
         }
 
         it->PrepareTransitionToDataProperty(value, NONE, store_mode);
         return it->IsCacheableTransition();
       }
     }
   }
 
-  if (it->IsSpecialNumericIndex()) return false;
   it->PrepareTransitionToDataProperty(value, NONE, store_mode);
   return it->IsCacheableTransition();
 }
 
 
 MaybeHandle<Object> StoreIC::Store(Handle<Object> object, Handle<Name> name,
                                    Handle<Object> value,
                                    JSReceiver::StoreFromKeyed store_mode) {
   if (FLAG_harmony_scoping && object->IsGlobalObject() && name->IsString()) {
     // Look up in script context table.
@@ skipping 284 matching lines @@
         NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder);
         return compiler.CompileStoreField(lookup);
       }
 
       // -------------- Constant properties --------------
       DCHECK(lookup->property_details().type() == DATA_CONSTANT);
       TRACE_GENERIC_IC(isolate(), "StoreIC", "constant property");
       break;
     }
 
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
       UNREACHABLE();
   }
   return slow_stub();
 }
 
 
 Handle<Code> KeyedStoreIC::StoreElementStub(Handle<JSObject> receiver,
@@ skipping 1202 matching lines @@
 static const Address IC_utilities[] = {
 #define ADDR(name) FUNCTION_ADDR(name),
     IC_UTIL_LIST(ADDR) NULL
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) { return IC_utilities[id]; }
 }
 }  // namespace v8::internal