handle the special snowflakes that are Integer Indexed Exotic objects

src/ic/handler-compiler.cc

 // Copyright 2014 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/cpu-profiler.h"
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
@@ skipping 262 matching lines @@
   // ExecutableAccessorInfo, so inline only them. Other cases may be added
   // later.
   bool inline_followup = false;
   switch (it->state()) {
     case LookupIterator::TRANSITION:
       UNREACHABLE();
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::INTERCEPTOR:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
       break;
     case LookupIterator::DATA:
       inline_followup =
           it->property_details().type() == DATA && !it->is_dictionary_holder();
       break;
     case LookupIterator::ACCESSOR: {
       Handle<Object> accessors = it->GetAccessors();
       if (accessors->IsExecutableAccessorInfo()) {
         Handle<ExecutableAccessorInfo> info =
             Handle<ExecutableAccessorInfo>::cast(accessors);
@@ skipping 46 matching lines @@
   Register reg = FrontendHeader(interceptor_reg, it->name(), &miss);
   FrontendFooter(it->name(), &miss);
   // We discard the vector and slot now because we don't miss below this point.
   InterceptorVectorSlotPop(reg, DISCARD);
 
   switch (it->state()) {
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::INTERCEPTOR:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
     case LookupIterator::TRANSITION:
       UNREACHABLE();
     case LookupIterator::DATA: {
       DCHECK_EQ(DATA, it->property_details().type());
       __ Move(receiver(), reg);
       LoadFieldStub stub(isolate(), it->GetFieldIndex());
       GenerateTailCall(masm(), stub.GetCode());
       break;
     }
     case LookupIterator::ACCESSOR:
@@ skipping 154 matching lines @@
         DCHECK(elements_kind == DICTIONARY_ELEMENTS);
         cached_stub = LoadDictionaryElementStub(isolate()).GetCode();
       }
     }
 
     handlers->Add(cached_stub);
   }
 }
 }
 }  // namespace v8::internal