Add inline caches for loading non-existing properties.

src/stub-cache.h

Index: src/stub-cache.h
===================================================================
--- src/stub-cache.h	(revision 4394)
+++ src/stub-cache.h	(working copy)
@@ -56,6 +56,8 @@
 
   // 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,
@@ -461,22 +463,28 @@
 
 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,
@@ -494,17 +502,21 @@
                            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);