diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 670a138..7e28307 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -1661,7 +1661,7 @@
   for (std::map<Record*, DAGInstruction>::iterator II = Instructions.begin(),
        E = Instructions.end(); II != E; ++II) {
     DAGInstruction &TheInst = II->second;
-    TreePattern *I = TheInst.getPattern();
+    const TreePattern *I = TheInst.getPattern();
     if (I == 0) continue;  // No pattern.
 
     // FIXME: Assume only the first tree is the pattern. The others are clobber
diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index 4097079..c40f46f 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -374,7 +374,7 @@
       ImpResults(impresults), ImpOperands(impoperands),
       ResultPattern(0) {}
 
-  TreePattern *getPattern() const { return Pattern; }
+  const TreePattern *getPattern() const { return Pattern; }
   unsigned getNumResults() const { return Results.size(); }
   unsigned getNumOperands() const { return Operands.size(); }
   unsigned getNumImpResults() const { return ImpResults.size(); }
diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index b0eada8..bd8d210 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -827,7 +827,7 @@
       const CodeGenTarget &CGT = CGP.getTargetInfo();
       CodeGenInstruction &II = CGT.getInstruction(Op->getName());
       const DAGInstruction &Inst = CGP.getInstruction(Op);
-      TreePattern *InstPat = Inst.getPattern();
+      const TreePattern *InstPat = Inst.getPattern();
       // FIXME: Assume actual pattern comes before "implicit".
       TreePatternNode *InstPatNode =
         isRoot ? (InstPat ? InstPat->getTree(0) : Pattern)