diff --git a/include/llvm/BasicBlock.h b/include/llvm/BasicBlock.h
index 561dbb27910..84dc6a66261 100644
--- a/include/llvm/BasicBlock.h
+++ b/include/llvm/BasicBlock.h
@@ -44,6 +44,7 @@ template<> struct ilist_traits<Instruction>
 
   Instruction *provideInitialHead() const { return createSentinel(); }
   Instruction *ensureHead(Instruction*) const { return createSentinel(); }
+  static void noteHead(Instruction*, Instruction*) {}
 
   static iplist<Instruction> &getList(BasicBlock *BB);
   static ValueSymbolTable *getSymTab(BasicBlock *ItemParent);
diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index de0a4c40f1d..388ca7f93b4 100644
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -40,6 +40,7 @@ public:
 
   MachineInstr *provideInitialHead() const { return createSentinel(); }
   MachineInstr *ensureHead(MachineInstr*) const { return createSentinel(); }
+  static void noteHead(MachineInstr*, MachineInstr*) {}
 
   void addNodeToList(MachineInstr* N);
   void removeNodeFromList(MachineInstr* N);
diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index 7386b2b1284..dc7fa8cb167 100644
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -48,6 +48,7 @@ public:
   MachineBasicBlock *ensureHead(MachineBasicBlock*) const {
     return createSentinel();
   }
+  static void noteHead(MachineBasicBlock*, MachineBasicBlock*) {}
 
   void addNodeToList(MachineBasicBlock* MBB);
   void removeNodeFromList(MachineBasicBlock* MBB);
diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index b895242f57e..7e81e02073c 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -48,6 +48,7 @@ public:
 
   SDNode *provideInitialHead() const { return createSentinel(); }
   SDNode *ensureHead(SDNode*) const { return createSentinel(); }
+  static void noteHead(SDNode*, SDNode*) {}
 
   static void deleteNode(SDNode *) {
     assert(0 && "ilist_traits<SDNode> shouldn't see a deleteNode call!");
diff --git a/include/llvm/Function.h b/include/llvm/Function.h
index cb3cc939d00..db13a0fa8a6 100644
--- a/include/llvm/Function.h
+++ b/include/llvm/Function.h
@@ -41,6 +41,7 @@ template<> struct ilist_traits<BasicBlock>
 
   BasicBlock *provideInitialHead() const { return createSentinel(); }
   BasicBlock *ensureHead(BasicBlock*) const { return createSentinel(); }
+  static void noteHead(BasicBlock*, BasicBlock*) {}
 
   static iplist<BasicBlock> &getList(Function *F);
   static ValueSymbolTable *getSymTab(Function *ItemParent);
@@ -59,6 +60,7 @@ template<> struct ilist_traits<Argument>
 
   Argument *provideInitialHead() const { return createSentinel(); }
   Argument *ensureHead(Argument*) const { return createSentinel(); }
+  static void noteHead(Argument*, Argument*) {}
 
   static iplist<Argument> &getList(Function *F);
   static ValueSymbolTable *getSymTab(Function *ItemParent);
diff --git a/include/llvm/Support/Recycler.h b/include/llvm/Support/Recycler.h
index 39c992bc537..2fa0365d5f5 100644
--- a/include/llvm/Support/Recycler.h
+++ b/include/llvm/Support/Recycler.h
@@ -48,6 +48,7 @@ struct ilist_traits<RecyclerStruct> : ilist_default_traits<RecyclerStruct> {
 
   RecyclerStruct *provideInitialHead() const { return createSentinel(); }
   RecyclerStruct *ensureHead(RecyclerStruct*) const { return createSentinel(); }
+  static void noteHead(RecyclerStruct*, RecyclerStruct*) {}
 
   static void deleteNode(RecyclerStruct *) {
     assert(0 && "Recycler's ilist_traits shouldn't see a deleteNode call!");