Allow FastCloneShallowObjectStub to use AllocationMementos.

src/runtime.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 468 matching lines @@
   HandleScope scope(isolate);
   ASSERT(args.length() == 4);
   CONVERT_ARG_HANDLE_CHECKED(FixedArray, literals, 0);
   CONVERT_SMI_ARG_CHECKED(literals_index, 1);
   CONVERT_ARG_HANDLE_CHECKED(FixedArray, constant_properties, 2);
   CONVERT_SMI_ARG_CHECKED(flags, 3);
   bool should_have_fast_elements = (flags & ObjectLiteral::kFastElements) != 0;
   bool has_function_literal = (flags & ObjectLiteral::kHasFunction) != 0;
 
   // Check if boilerplate exists. If not, create it first.
-  Handle<Object> boilerplate(literals->get(literals_index), isolate);
-  if (*boilerplate == isolate->heap()->undefined_value()) {
+  Handle<Object> literal_site(literals->get(literals_index), isolate);
+  Handle<AllocationSite> site;
+  Handle<Object> boilerplate;
+  if (*literal_site == isolate->heap()->undefined_value()) {
     boilerplate = CreateObjectLiteralBoilerplate(isolate,
                                                  literals,
                                                  constant_properties,
                                                  should_have_fast_elements,
                                                  has_function_literal);
     RETURN_IF_EMPTY_HANDLE(isolate, boilerplate);
+    site = isolate->factory()->NewAllocationSite();
+    site->set_transition_info(*boilerplate);
+
     // Update the functions literal and return the boilerplate.
-    literals->set(literals_index, *boilerplate);
+    literals->set(literals_index, *site);
+  } else {
+    site = Handle<AllocationSite>::cast(literal_site);
+    boilerplate = Handle<JSObject>(JSObject::cast(site->transition_info()));
   }
 
   Handle<Object> copy = JSObject::DeepCopy(Handle<JSObject>::cast(boilerplate));
   RETURN_IF_EMPTY_HANDLE(isolate, copy);
   return *copy;
 }
 
 
 static Handle<AllocationSite> GetLiteralAllocationSite(
     Isolate* isolate,
@@ skipping 14307 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal