diff --git a/lib/Analysis/DomPrinter.cpp b/lib/Analysis/DomPrinter.cpp
index ebfba7e..762cd9f 100644
--- a/lib/Analysis/DomPrinter.cpp
+++ b/lib/Analysis/DomPrinter.cpp
@@ -30,6 +30,9 @@
 namespace llvm {
 template<>
 struct DOTGraphTraits<DomTreeNode*> : public DefaultDOTGraphTraits {
+
+  DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+
   static std::string getNodeLabel(DomTreeNode *Node, DomTreeNode *Graph,
                                   bool ShortNames) {
 
@@ -46,6 +49,9 @@
 template<>
 struct DOTGraphTraits<DominatorTree*> : public DOTGraphTraits<DomTreeNode*> {
 
+  DOTGraphTraits (bool isSimple=false)
+    : DOTGraphTraits<DomTreeNode*>(isSimple) {}
+
   static std::string getGraphName(DominatorTree *DT) {
     return "Dominator tree";
   }
@@ -61,6 +67,10 @@
 template<>
 struct DOTGraphTraits<PostDominatorTree*>
   : public DOTGraphTraits<DomTreeNode*> {
+
+  DOTGraphTraits (bool isSimple=false)
+    : DOTGraphTraits<DomTreeNode*>(isSimple) {}
+
   static std::string getGraphName(PostDominatorTree *DT) {
     return "Post dominator tree";
   }
diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 81d1301..db7b949 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -359,6 +359,9 @@
 namespace llvm {
   template<>
   struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
+
+  DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+
     static std::string getGraphName(const MachineFunction *F) {
       return "CFG for '" + F->getFunction()->getNameStr() + "' function";
     }
diff --git a/lib/CodeGen/ScheduleDAGPrinter.cpp b/lib/CodeGen/ScheduleDAGPrinter.cpp
index 4851d49..5855f96 100644
--- a/lib/CodeGen/ScheduleDAGPrinter.cpp
+++ b/lib/CodeGen/ScheduleDAGPrinter.cpp
@@ -32,6 +32,9 @@
 namespace llvm {
   template<>
   struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
+
+  DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+
     static std::string getGraphName(const ScheduleDAG *G) {
       return G->MF.getFunction()->getName();
     }
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index ccc5e3c..3a50992 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -35,6 +35,9 @@
 namespace llvm {
   template<>
   struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {
+
+    DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+
     static bool hasEdgeDestLabels() {
       return true;
     }
@@ -48,8 +51,8 @@
     }
 
     /// edgeTargetsEdgeSource - This method returns true if this outgoing edge
-    /// should actually target another edge source, not a node.  If this method is
-    /// implemented, getEdgeTarget should be implemented.
+    /// should actually target another edge source, not a node.  If this method
+    /// is implemented, getEdgeTarget should be implemented.
     template<typename EdgeIter>
     static bool edgeTargetsEdgeSource(const void *Node, EdgeIter I) {
       return true;