diff --git a/compiler/driver/compiler_driver.h b/compiler/driver/compiler_driver.h
index 98e3d89..0ed0bb6 100644
--- a/compiler/driver/compiler_driver.h
+++ b/compiler/driver/compiler_driver.h
@@ -619,6 +619,8 @@
   void FreeThreadPools();
   void CheckThreadPools();
 
+  bool RequiresConstructorBarrier(const DexFile& dex_file, uint16_t class_def_idx) const;
+
   const CompilerOptions* const compiler_options_;
   VerificationResults* const verification_results_;
   DexFileToMethodInlinerMap* const method_inliner_map_;
@@ -629,10 +631,14 @@
   const InstructionSet instruction_set_;
   const InstructionSetFeatures* const instruction_set_features_;
 
-  // All class references that do not require constructor barriers
+  // All class references that do not require constructor barriers. Only filled in if
+  // resolved_classes_ is true.
   mutable ReaderWriterMutex no_barrier_constructor_classes_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;
   std::set<ClassReference> no_barrier_constructor_classes_
       GUARDED_BY(no_barrier_constructor_classes_lock_);
+  // resolved_classes_ is true if we performed the resolve phase and filled in
+  // no_barrier_constructor_classes_.
+  bool resolved_classes_;
 
   typedef SafeMap<const ClassReference, CompiledClass*> ClassTable;
   // All class references that this compiler has compiled.