--- a/include/llvm/Analysis/LoopPass.h	Fri Nov 25 19:14:25 2016 +0900
+++ b/include/llvm/Analysis/LoopPass.h	Fri Oct 27 17:07:41 2017 +0900
@@ -126,9 +126,11 @@
   }
 
 public:
-  // Add a new loop into the loop queue as a child of the given parent, or at
-  // the top level if \c ParentLoop is null.
-  Loop &addLoop(Loop *ParentLoop);
+  // Add a new loop into the loop queue.
+  void addLoop(Loop &L);
+
+  // Mark \p L as deleted.
+  void markLoopAsDeleted(Loop &L);
 
   //===--------------------------------------------------------------------===//
   /// SimpleAnalysis - Provides simple interface to update analysis info
@@ -153,6 +155,7 @@
   std::deque<Loop *> LQ;
   LoopInfo *LI;
   Loop *CurrentLoop;
+  bool CurrentLoopDeleted;
 };
 
 // This pass is required by the LCSSA transformation. It is used inside