Maintain a FixedArray for the optimized code map.

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 2122 matching lines @@
   Handle<Map> map = shared_function_info_map();
   Handle<SharedFunctionInfo> share = New<SharedFunctionInfo>(map, OLD_SPACE);
 
   // Set pointer fields.
   share->set_name(*name);
   Handle<Code> code;
   if (!maybe_code.ToHandle(&code)) {
     code = handle(isolate()->builtins()->builtin(Builtins::kIllegal));
   }
   share->set_code(*code);
-  share->set_optimized_code_map(Smi::FromInt(0));
+  share->set_optimized_code_map(*cleared_optimized_code_map());
   share->set_scope_info(ScopeInfo::Empty(isolate()));
   Code* construct_stub =
       isolate()->builtins()->builtin(Builtins::kJSConstructStubGeneric);
   share->set_construct_stub(construct_stub);
   share->set_instance_class_name(*Object_string());
   share->set_function_data(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_script(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_debug_info(*undefined_value(), SKIP_WRITE_BARRIER);
   share->set_inferred_name(*empty_string(), SKIP_WRITE_BARRIER);
   StaticFeedbackVectorSpec empty_spec;
@@ skipping 249 matching lines @@
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 }  // namespace internal
 }  // namespace v8