Revert "Captured arguments object materialization"

src/accessors.cc

 // Copyright 2012 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 688 matching lines @@
                      Object);
 }
 
 
 static MaybeObject* ConstructArgumentsObjectForInlinedFunction(
     JavaScriptFrame* frame,
     Handle<JSFunction> inlined_function,
     int inlined_frame_index) {
   Isolate* isolate = inlined_function->GetIsolate();
   Factory* factory = isolate->factory();
-  SlotRefValueBuilder slot_refs(
-      frame,
-      inlined_frame_index,
-      inlined_function->shared()->formal_parameter_count());
-
-  int args_count = slot_refs.args_length();
+  Vector<SlotRef> args_slots =
+      SlotRef::ComputeSlotMappingForArguments(
+          frame,
+          inlined_frame_index,
+          inlined_function->shared()->formal_parameter_count());
+  int args_count = args_slots.length();
   Handle<JSObject> arguments =
       factory->NewArgumentsObject(inlined_function, args_count);
   Handle<FixedArray> array = factory->NewFixedArray(args_count);
-  slot_refs.Prepare(isolate);
   for (int i = 0; i < args_count; ++i) {
-    Handle<Object> value = slot_refs.GetNext(isolate, 0);
+    Handle<Object> value = args_slots[i].GetValue(isolate);
     array->set(i, *value);
   }
-  slot_refs.Finish(isolate);
   arguments->set_elements(*array);
+  args_slots.Dispose();
 
   // Return the freshly allocated arguments object.
   return *arguments;
 }
 
 
 MaybeObject* Accessors::FunctionGetArguments(Isolate* isolate,
                                              Object* object,
                                              void*) {
   HandleScope scope(isolate);
@@ skipping 235 matching lines @@
   info->set_data(Smi::FromInt(index));
   Handle<Object> getter = v8::FromCData(isolate, &ModuleGetExport);
   Handle<Object> setter = v8::FromCData(isolate, &ModuleSetExport);
   info->set_getter(*getter);
   if (!(attributes & ReadOnly)) info->set_setter(*setter);
   return info;
 }
 
 
 } }  // namespace v8::internal