Reland "[turbofan] Discard the shared code entry in 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 6400 matching lines @@
   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();
+  return optimized_code_map() == GetHeap()->empty_fixed_array();
 }
 
 
 bool JSFunction::IsOptimized() {
   return code()->kind() == Code::OPTIMIZED_FUNCTION;
 }
 
 bool JSFunction::IsMarkedForBaseline() {
   return code() ==
          GetIsolate()->builtins()->builtin(Builtins::kCompileBaseline);
@@ skipping 1883 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_