3 files changed, 19 insertions, 3 deletions
diff --git a/include/llvm/CodeGen/MachineBasicBlock.h b/include/llvm/CodeGen/MachineBasicBlock.h
index 5a9f3991f2..de0a4c40f1 100644
--- a/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/include/llvm/CodeGen/MachineBasicBlock.h
@@ -38,6 +38,9 @@ public:
   }
   void destroySentinel(MachineInstr *) const {}
 
+  MachineInstr *provideInitialHead() const { return createSentinel(); }
+  MachineInstr *ensureHead(MachineInstr*) const { return createSentinel(); }
+
   void addNodeToList(MachineInstr* N);
   void removeNodeFromList(MachineInstr* N);
   void transferNodesFromList(ilist_traits &SrcTraits,
diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index 1371f1d0cd..7386b2b128 100644
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -44,6 +44,11 @@ public:
   }
   void destroySentinel(MachineBasicBlock *) const {}
 
+  MachineBasicBlock *provideInitialHead() const { return createSentinel(); }
+  MachineBasicBlock *ensureHead(MachineBasicBlock*) const {
+    return createSentinel();
+  }
+
   void addNodeToList(MachineBasicBlock* MBB);
   void removeNodeFromList(MachineBasicBlock* MBB);
   void deleteNode(MachineBasicBlock *MBB);
@@ -363,8 +368,12 @@ template <> struct GraphTraits<const MachineFunction*> :
 
   // nodes_iterator/begin/end - Allow iteration over all nodes in the graph
   typedef MachineFunction::const_iterator nodes_iterator;
-  static nodes_iterator nodes_begin(const MachineFunction *F) { return F->begin(); }
-  static nodes_iterator nodes_end  (const MachineFunction *F) { return F->end(); }
+  static nodes_iterator nodes_begin(const MachineFunction *F) {
+    return F->begin();
+  }
+  static nodes_iterator nodes_end  (const MachineFunction *F) {
+    return F->end();
+  }
 };
 
 
diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index fe89fe0546..b895242f57 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -46,6 +46,9 @@ public:
   }
   static void destroySentinel(SDNode *) {}
 
+  SDNode *provideInitialHead() const { return createSentinel(); }
+  SDNode *ensureHead(SDNode*) const { return createSentinel(); }
+
   static void deleteNode(SDNode *) {
     assert(0 && "ilist_traits<SDNode> shouldn't see a deleteNode call!");
   }
@@ -112,7 +115,8 @@ class SelectionDAG {
   /// setGraphColorHelper - Implementation of setSubgraphColor.
   /// Return whether we had to truncate the search.
   ///
-  bool setSubgraphColorHelper(SDNode *N, const char *Color, DenseSet<SDNode *> &visited,
+  bool setSubgraphColorHelper(SDNode *N, const char *Color,
+                              DenseSet<SDNode *> &visited,
                               int level, bool &printed);
 
 public: