handle the special snowflakes that are Integer Indexed Exotic objects

src/ic/ic.cc

Index: src/ic/ic.cc
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 41f2a334aabc709a3c2451efe9cfe3e274822559..f8c3b0669f09272ee32f029a5dc4c1fb08448b81 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -262,6 +262,7 @@ static void LookupForRead(LookupIterator* it) {
         }
         return;
       case LookupIterator::ACCESSOR:
+      case LookupIterator::INTEGER_INDEXED_EXOTIC:
       case LookupIterator::DATA:
         return;
     }
@@ -1316,6 +1317,8 @@ Handle<Code> LoadIC::CompileHandler(LookupIterator* lookup,
                                           lookup->GetConstantIndex());
     }
 
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
+      return slow_stub();
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
@@ -1506,6 +1509,8 @@ bool StoreIC::LookupForWrite(LookupIterator* it, Handle<Object> value,
         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>();
@@ -1530,7 +1535,6 @@ bool StoreIC::LookupForWrite(LookupIterator* it, Handle<Object> value,
     }
   }
 
-  if (it->IsSpecialNumericIndex()) return false;
   it->PrepareTransitionToDataProperty(value, NONE, store_mode);
   return it->IsCacheableTransition();
 }
@@ -1835,6 +1839,7 @@ Handle<Code> StoreIC::CompileHandler(LookupIterator* lookup,
       break;
     }
 
+    case LookupIterator::INTEGER_INDEXED_EXOTIC:
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND: