diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 3d29f64eaef..94d353491c9 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -848,7 +848,7 @@ TreePatternNode::getComplexPatternInfo(const CodeGenDAGPatterns &CGP) const {
 
 /// NodeHasProperty - Return true if this node has the specified property.
 bool TreePatternNode::NodeHasProperty(SDNP Property,
-                                      CodeGenDAGPatterns &CGP) const {
+                                      const CodeGenDAGPatterns &CGP) const {
   if (isLeaf()) {
     if (const ComplexPattern *CP = getComplexPatternInfo(CGP))
       return CP->hasProperty(Property);
@@ -867,7 +867,7 @@ bool TreePatternNode::NodeHasProperty(SDNP Property,
 /// TreeHasProperty - Return true if any node in this tree has the specified
 /// property.
 bool TreePatternNode::TreeHasProperty(SDNP Property,
-                                      CodeGenDAGPatterns &CGP) const {
+                                      const CodeGenDAGPatterns &CGP) const {
   if (NodeHasProperty(Property, CGP))
     return true;
   for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index 887220e54e1..5eef9e1ddc6 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -243,11 +243,11 @@ public:
   getComplexPatternInfo(const CodeGenDAGPatterns &CGP) const;
 
   /// NodeHasProperty - Return true if this node has the specified property.
-  bool NodeHasProperty(SDNP Property, CodeGenDAGPatterns &CGP) const;
+  bool NodeHasProperty(SDNP Property, const CodeGenDAGPatterns &CGP) const;
   
   /// TreeHasProperty - Return true if any node in this tree has the specified
   /// property.
-  bool TreeHasProperty(SDNP Property, CodeGenDAGPatterns &CGP) const;
+  bool TreeHasProperty(SDNP Property, const CodeGenDAGPatterns &CGP) const;
   
   /// isCommutativeIntrinsic - Return true if the node is an intrinsic which is
   /// marked isCommutative.