diff --git a/compiler/optimizing/loop_optimization.h b/compiler/optimizing/loop_optimization.h
index 4113357..e18d175 100644
--- a/compiler/optimizing/loop_optimization.h
+++ b/compiler/optimizing/loop_optimization.h
@@ -64,6 +64,10 @@
   void SimplifyBlocks(LoopNode* node);
   void RemoveIfEmptyInnerLoop(LoopNode* node);
 
+  bool IsPhiInduction(HPhi* phi);
+  bool IsEmptyHeader(HBasicBlock* block);
+  bool IsEmptyBody(HBasicBlock* block);
+
   bool IsOnlyUsedAfterLoop(HLoopInformation* loop_info,
                            HInstruction* instruction,
                            /*out*/ int32_t* use_count);