Maintain a FixedArray for the optimized code map.

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 5699 matching lines @@
 ACCESSORS(DebugInfo, shared, SharedFunctionInfo, kSharedFunctionInfoIndex)
 ACCESSORS(DebugInfo, code, Code, kCodeIndex)
 ACCESSORS(DebugInfo, break_points, FixedArray, kBreakPointsStateIndex)
 
 SMI_ACCESSORS(BreakPointInfo, code_position, kCodePositionIndex)
 SMI_ACCESSORS(BreakPointInfo, source_position, kSourcePositionIndex)
 SMI_ACCESSORS(BreakPointInfo, statement_position, kStatementPositionIndex)
 ACCESSORS(BreakPointInfo, break_point_objects, Object, kBreakPointObjectsIndex)
 
 ACCESSORS(SharedFunctionInfo, name, Object, kNameOffset)
-ACCESSORS(SharedFunctionInfo, optimized_code_map, Object,
-                 kOptimizedCodeMapOffset)
+ACCESSORS(SharedFunctionInfo, optimized_code_map, FixedArray,
+          kOptimizedCodeMapOffset)
 ACCESSORS(SharedFunctionInfo, construct_stub, Code, kConstructStubOffset)
 ACCESSORS(SharedFunctionInfo, feedback_vector, TypeFeedbackVector,
           kFeedbackVectorOffset)
 #if TRACE_MAPS
 SMI_ACCESSORS(SharedFunctionInfo, unique_id, kUniqueIdOffset)
 #endif
 ACCESSORS(SharedFunctionInfo, instance_class_name, Object,
           kInstanceClassNameOffset)
 ACCESSORS(SharedFunctionInfo, function_data, Object, kFunctionDataOffset)
 ACCESSORS(SharedFunctionInfo, script, Object, kScriptOffset)
@@ skipping 426 matching lines @@
   if (script_obj->IsUndefined()) return true;
   Script* script = Script::cast(script_obj);
   Script::Type type = static_cast<Script::Type>(script->type());
   return type != Script::TYPE_NORMAL;
 }
 
 
 bool SharedFunctionInfo::IsSubjectToDebugging() { return !IsBuiltin(); }
 
 
+bool SharedFunctionInfo::OptimizedCodeMapIsCleared() const {
+  return optimized_code_map() == GetHeap()->cleared_optimized_code_map();
+}
+
+
 bool JSFunction::IsOptimized() {
   return code()->kind() == Code::OPTIMIZED_FUNCTION;
 }
 
 
 bool JSFunction::IsMarkedForOptimization() {
   return code() == GetIsolate()->builtins()->builtin(
       Builtins::kCompileOptimized);
 }
 
@@ skipping 1703 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_