Reuse the nonexistent handler frontend for transition handlers

src/stub-cache.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_STUB_CACHE_H_
 #define V8_STUB_CACHE_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/code-stubs.h"
@@ skipping 373 matching lines @@
 
   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
                                   Label* miss) {
     UNREACHABLE();
     return receiver();
   }
 
   virtual void FrontendFooter(Handle<Name> name, Label* miss) { UNREACHABLE(); }
 
   Register Frontend(Register object_reg, Handle<Name> name);
+  void NonexistentFrontendHeader(Handle<Name> name, Label* miss,
+                                 Register scratch1, Register scratch2);
 
   // TODO(verwaest): Make non-static.
   static void GenerateFastApiCall(MacroAssembler* masm,
                                   const CallOptimization& optimization,
                                   Handle<Map> receiver_map, Register receiver,
                                   Register scratch, bool is_store, int argc,
                                   Register* values);
 
   // Helper function used to check that the dictionary doesn't contain
   // the property. This function may return false negatives, so miss_label
@@ skipping 108 matching lines @@
  protected:
   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
                                   Label* miss);
 
   virtual void FrontendFooter(Handle<Name> name, Label* miss);
 
  private:
   Register CallbackFrontend(Register object_reg, Handle<Name> name,
                             Handle<Object> callback);
   Handle<Code> CompileLoadNonexistent(Handle<Name> name);
-  void NonexistentFrontend(Handle<Name> name);
-
   void GenerateLoadField(Register reg,
                          FieldIndex field,
                          Representation representation);
   void GenerateLoadConstant(Handle<Object> value);
   void GenerateLoadCallback(Register reg,
                             Handle<ExecutableAccessorInfo> callback);
   void GenerateLoadCallback(const CallOptimization& call_optimization,
                             Handle<Map> receiver_map);
   void GenerateLoadInterceptor(Register holder_reg,
                                LookupResult* lookup,
@@ skipping 48 matching lines @@
   }
 
  protected:
   virtual Register FrontendHeader(Register object_reg, Handle<Name> name,
                                   Label* miss);
 
   virtual void FrontendFooter(Handle<Name> name, Label* miss);
   void GenerateRestoreName(Label* label, Handle<Name> name);
 
  private:
-  void GenerateNegativeHolderLookup(Register holder_reg, Handle<Name> name,
-                                    Label* miss);
-
   void GenerateStoreTransition(Handle<Map> transition, Handle<Name> name,
                                Register receiver_reg, Register name_reg,
                                Register value_reg, Register scratch1,
                                Register scratch2, Register scratch3,
                                Label* miss_label, Label* slow);
 
   void GenerateStoreField(Handle<JSObject> object, LookupResult* lookup,
                           Register receiver_reg, Register name_reg,
                           Register value_reg, Register scratch1,
                           Register scratch2, Label* miss_label);
@@ skipping 81 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_