Add inline caches for loading non-existing properties.

src/stub-cache.h

 // Copyright 2006-2008 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 38 matching lines @@
   struct Entry {
     String* key;
     Code* value;
   };
 
 
   static void Initialize(bool create_heap_objects);
 
   // Computes the right stub matching. Inserts the result in the
   // cache before returning.  This might compile a stub if needed.
+  static Object* ComputeLoadNonExisting(String* name, JSObject* receiver);
+
   static Object* ComputeLoadField(String* name,
                                   JSObject* receiver,
                                   JSObject* holder,
                                   int field_index);
 
   static Object* ComputeLoadCallback(String* name,
                                      JSObject* receiver,
                                      JSObject* holder,
                                      AccessorInfo* callback);
 
@@ skipping 385 matching lines @@
 
  private:
   HandleScope scope_;
   MacroAssembler masm_;
   Failure* failure_;
 };
 
 
 class LoadStubCompiler: public StubCompiler {
  public:
+  Object* CompileLoadNonExisting(JSObject* object);
+
   Object* CompileLoadField(JSObject* object,
                            JSObject* holder,
                            int index,
                            String* name);
+
   Object* CompileLoadCallback(String* name,
                               JSObject* object,
                               JSObject* holder,
                               AccessorInfo* callback);
+
   Object* CompileLoadConstant(JSObject* object,
                               JSObject* holder,
                               Object* value,
                               String* name);
+
   Object* CompileLoadInterceptor(JSObject* object,
                                  JSObject* holder,
                                  String* name);
 
+

[Erik Corry, 2010/04/13 19:18:37]

Extra blank line?

[Mads Ager (chromium), 2010/04/14 06:26:10]

Good catch, removed.

   Object* CompileLoadGlobal(JSObject* object,
                             GlobalObject* holder,
                             JSGlobalPropertyCell* cell,
                             String* name,
                             bool is_dont_delete);
 
  private:
   Object* GetCode(PropertyType type, String* name);
 };
 
 
 class KeyedLoadStubCompiler: public StubCompiler {
  public:
   Object* CompileLoadField(String* name,
                            JSObject* object,
                            JSObject* holder,
                            int index);
+
   Object* CompileLoadCallback(String* name,
                               JSObject* object,
                               JSObject* holder,
                               AccessorInfo* callback);
+
   Object* CompileLoadConstant(String* name,
                               JSObject* object,
                               JSObject* holder,
                               Object* value);
+
   Object* CompileLoadInterceptor(JSObject* object,
                                  JSObject* holder,
                                  String* name);
+
   Object* CompileLoadArrayLength(String* name);
   Object* CompileLoadStringLength(String* name);
   Object* CompileLoadFunctionPrototype(String* name);
 
  private:
   Object* GetCode(PropertyType type, String* name);
 };
 
 
 class StoreStubCompiler: public StubCompiler {
@@ skipping 104 matching lines @@
                             Object* object,
                             JSObject* holder,
                             JSFunction* function,
                             String* name,
                             StubCompiler::CheckType check);
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_