Improve memory usage of receiver type feedback.

src/stub-cache.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 28 matching lines @@
 
 
 // The stub cache is used for megamorphic calls and property accesses.
 // It maps (map, name, type)->Code*
 
 // The design of the table uses the inline cache stubs used for
 // mono-morphic calls. The beauty of this, we do not have to
 // invalidate the cache whenever a prototype map is changed.  The stub
 // validates the map chain as in the mono-morphic case.
 
+class SmallMapList;
 class StubCache;
 
+
 class SCTableReference {
  public:
   Address address() const { return address_; }
 
  private:
   explicit SCTableReference(Address address) : address_(address) {}
 
   Address address_;
 
   friend class StubCache;
@@ skipping 226 matching lines @@
                                                              Code::Kind kind);
 #endif
 
   // Update cache for entry hash(name, map).
   Code* Set(String* name, Map* map, Code* code);
 
   // Clear the lookup table (@ mark compact collection).
   void Clear();
 
   // Collect all maps that match the name and flags.
-  void CollectMatchingMaps(ZoneMapList* types,
+  void CollectMatchingMaps(SmallMapList* types,
                            String* name,
                            Code::Flags flags);
 
   // Generate code for probing the stub cache table.
   // Arguments extra and extra2 may be used to pass additional scratch
   // registers. Set to no_reg if not needed.
   void GenerateProbe(MacroAssembler* masm,
                      Code::Flags flags,
                      Register receiver,
                      Register name,
@@ skipping 593 matching lines @@
   JSFunction* constant_function_;
   bool is_simple_api_call_;
   FunctionTemplateInfo* expected_receiver_type_;
   CallHandlerInfo* api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_