Use mutable heapnumbers to store doubles in fields.

src/parser.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 3996 matching lines @@
     MaterializedLiteral* m_literal = property->value()->AsMaterializedLiteral();
     if (m_literal != NULL && m_literal->depth() >= depth_acc) {
       depth_acc = m_literal->depth() + 1;
     }
 
     // Add CONSTANT and COMPUTED properties to boilerplate. Use undefined
     // value for COMPUTED properties, the real value is filled in at
     // runtime. The enumeration order is maintained.
     Handle<Object> key = property->key()->handle();
     Handle<Object> value = GetBoilerplateValue(property->value());
+
+    // Ensure objects with doubles are always treated as nested objects.
+    // TODO(verwaest): Remove once we can store them inline.
+    if (FLAG_track_fields && value->IsNumber()) {
+      depth_acc = Max(2, depth_acc);
+    }

[danno, 2013/05/07 13:04:47]

*COUGH* Any other better way to do this? *COUGH*
Boolean would be better.

[Toon Verwaest, 2013/05/07 15:08:52]

Done.

     is_simple_acc = is_simple_acc && !value->IsUndefined();
 
     // Keep track of the number of elements in the object literal and
     // the largest element index.  If the largest element index is
     // much larger than the number of elements, creating an object
     // literal with fast elements will be a waste of space.
     uint32_t element_index = 0;
     if (key->IsString()
         && Handle<String>::cast(key)->AsArrayIndex(&element_index)
         && element_index > max_element_index) {
@@ skipping 2009 matching lines @@
       ASSERT(info()->isolate()->has_pending_exception());
     } else {
       result = ParseProgram();
     }
   }
   info()->SetFunction(result);
   return (result != NULL);
 }
 
 } }  // namespace v8::internal