Add a soft-deopt in keyed element access when current IC is pre-monomorphic and no type feedback wa…

src/type-info.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 225 matching lines @@
 
 class TypeFeedbackOracle: public ZoneObject {
  public:
   TypeFeedbackOracle(Handle<Code> code,
                      Handle<Context> native_context,
                      Isolate* isolate,
                      Zone* zone);
 
   bool LoadIsMonomorphicNormal(Property* expr);
   bool LoadIsUninitialized(Property* expr);
+  bool LoadIsPreMonomorphic(Property* expr);
   bool LoadIsPolymorphic(Property* expr);
   bool StoreIsUninitialized(TypeFeedbackId ast_id);
   bool StoreIsMonomorphicNormal(TypeFeedbackId ast_id);
+  bool StoreIsPreMonomorphic(TypeFeedbackId ast_id);
   bool StoreIsKeyedPolymorphic(TypeFeedbackId ast_id);
   bool CallIsMonomorphic(Call* expr);
   bool CallNewIsMonomorphic(CallNew* expr);
   bool ObjectLiteralStoreIsMonomorphic(ObjectLiteralProperty* prop);
 
   // TODO(1571) We can't use ForInStatement::ForInType as the return value due
   // to various cycles in our headers.
   byte ForInType(ForInStatement* expr);
 
   Handle<Map> LoadMonomorphicReceiverType(Property* expr);
@@ skipping 86 matching lines @@
   Isolate* isolate_;
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_