Filter out maps from different global context when collecting type feedback.

src/type-info.h

 // Copyright 2011 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 238 matching lines @@
   void StoreReceiverTypes(Assignment* expr,
                           Handle<String> name,
                           SmallMapList* types);
   void CallReceiverTypes(Call* expr,
                          Handle<String> name,
                          CallKind call_kind,
                          SmallMapList* types);
   void CollectKeyedReceiverTypes(unsigned ast_id,
                                  SmallMapList* types);
 
+  static bool InSameContext(Handle<Map> map, Handle<Context> global_context);

[Vyacheslav Egorov (Chromium), 2011/12/12 13:34:44]

I would better call it: WillRetainDifferentContext or something like this (and
invert true and false) because it returns true if it can't determine context for
example.

This name would also reflect it's purpose (you should also add a comment why
this function&filtering was introduced).

+
   CheckType GetCallCheckType(Call* expr);
   Handle<JSObject> GetPrototypeForPrimitiveCheck(CheckType check);
 
   Handle<JSFunction> GetCallTarget(Call* expr);
 
   bool LoadIsBuiltin(Property* expr, Builtins::Name id);
 
   // TODO(1571) We can't use ToBooleanStub::Types as the return value because
   // of various cylces in our headers. Death to tons of implementations in
   // headers!! :-P
@@ skipping 31 matching lines @@
   Handle<Context> global_context_;
   Isolate* isolate_;
   Handle<NumberDictionary> dictionary_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_