[ic] Split megamorphic stub cache in two caches (for loads and for stores).

src/type-info.h

 // Copyright 2012 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.
 
 #ifndef V8_TYPE_INFO_H_
 #define V8_TYPE_INFO_H_
 
 #include "src/allocation.h"
 #include "src/contexts.h"
 #include "src/globals.h"
 #include "src/parsing/token.h"
 #include "src/types.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class SmallMapList;
 class FeedbackNexus;
+class StubCache;
 
 class TypeFeedbackOracle: public ZoneObject {
  public:
   TypeFeedbackOracle(Isolate* isolate, Zone* zone, Handle<Code> code,
                      Handle<TypeFeedbackVector> feedback_vector,
                      Handle<Context> native_context);
 
   InlineCacheState LoadInlineCacheState(FeedbackVectorSlot slot);
   bool StoreIsUninitialized(FeedbackVectorSlot slot);
   bool CallIsUninitialized(FeedbackVectorSlot slot);
@@ skipping 57 matching lines @@
                    Type** left,
                    Type** right,
                    Type** combined);
 
   Type* CountType(TypeFeedbackId id);
 
   Zone* zone() const { return zone_; }
   Isolate* isolate() const { return isolate_; }
 
  private:
-  void CollectReceiverTypes(FeedbackVectorSlot slot, Handle<Name> name,
-                            Code::Flags flags, SmallMapList* types);
-  void CollectReceiverTypes(FeedbackNexus* nexus, Handle<Name> name,
-                            Code::Flags flags, SmallMapList* types);
+  void CollectReceiverTypes(StubCache* stub_cache, FeedbackVectorSlot slot,
+                            Handle<Name> name, Code::Flags flags,
+                            SmallMapList* types);
+  void CollectReceiverTypes(StubCache* stub_cache, FeedbackNexus* nexus,
+                            Handle<Name> name, Code::Flags flags,
+                            SmallMapList* types);
 
   // Returns true if there is at least one string map and if
   // all maps are string maps.
   bool HasOnlyStringMaps(SmallMapList* receiver_types);
 
   void SetInfo(TypeFeedbackId id, Object* target);
 
   void BuildDictionary(Handle<Code> code);
   void GetRelocInfos(Handle<Code> code, ZoneList<RelocInfo>* infos);
   void CreateDictionary(Handle<Code> code, ZoneList<RelocInfo>* infos);
@@ skipping 17 matching lines @@
   Handle<UnseededNumberDictionary> dictionary_;
   Handle<TypeFeedbackVector> feedback_vector_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TYPE_INFO_H_