diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index c51232a..26a962a 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -298,6 +298,11 @@
   bool canPatternMatch(std::string &Reason, const CodeGenDAGPatterns &CDP);
 };
 
+inline raw_ostream &operator<<(raw_ostream &OS, const TreePatternNode &TPN) {
+  TPN.print(OS);
+  return OS;
+}
+  
 
 /// TreePattern - Represent a pattern, used for instructions, pattern
 /// fragments, etc.