[ic] Support data handlers that represent transitioning stores.

src/ic/ic.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_IC_H_
 #define V8_IC_H_
 
 #include "src/ic/ic-state.h"
 #include "src/macro-assembler.h"
 #include "src/messages.h"
@@ skipping 296 matching lines @@
 
   Handle<Object> GetMapIndependentHandler(LookupIterator* lookup) override;
 
   Handle<Object> CompileHandler(LookupIterator* lookup, Handle<Object> unused,
                                 CacheHolderFlag cache_holder) override;
 
  private:
   // Creates a data handler that represents a load of a field by given index.
   Handle<Object> SimpleFieldLoad(FieldIndex index);
 
-  // Returns 0 if the validity cell check is enough to ensure that the
-  // prototype chain from |receiver_map| till |holder| did not change.
-  // If the |holder| is an empty handle then the full prototype chain is
-  // checked.
-  // Returns -1 if the handler has to be compiled or the number of prototype
-  // checks otherwise.
-  int GetPrototypeCheckCount(Handle<Map> receiver_map, Handle<JSObject> holder);
-
   // Creates a data handler that represents a prototype chain check followed
   // by given Smi-handler that encoded a load from the holder.
   // Can be used only if GetPrototypeCheckCount() returns non negative value.
   Handle<Object> LoadFromPrototype(Handle<Map> receiver_map,
                                    Handle<JSObject> holder, Handle<Name> name,
                                    Handle<Object> smi_handler);
 
   // Creates a data handler that represents a load of a non-existent property.
   Handle<Object> LoadNonExistent(Handle<Map> receiver_map, Handle<Name> name);
 
@@ skipping 83 matching lines @@
 
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupIterator* lookup, Handle<Object> value,
                     JSReceiver::StoreFromKeyed store_mode);
   Handle<Object> GetMapIndependentHandler(LookupIterator* lookup) override;
   Handle<Object> CompileHandler(LookupIterator* lookup, Handle<Object> value,
                                 CacheHolderFlag cache_holder) override;
 
  private:
+  Handle<Object> StoreTransition(Handle<Map> receiver_map,
+                                 Handle<JSObject> holder,
+                                 Handle<Map> transition, Handle<Name> name);
+
   friend class IC;
 };
 
 
 enum KeyedStoreCheckMap { kDontCheckMap, kCheckMap };
 
 
 enum KeyedStoreIncrementLength { kDontIncrementLength, kIncrementLength };
 
 
@@ skipping 83 matching lines @@
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Isolate* isolate, Address address,
                          InlinedSmiCheck check);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IC_H_