diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 5bb4ddb..eb0b099 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -884,6 +884,12 @@
       MadeChange = getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
     MadeChange |= UpdateNodeType(MVT::isVoid, TP);
     return MadeChange;
+  } else if (getOperator()->getName() == "COPY_TO_SUBCLASS") {
+    bool MadeChange = false;
+    MadeChange |= getChild(0)->ApplyTypeConstraints(TP, NotRegisters);
+    MadeChange |= getChild(1)->ApplyTypeConstraints(TP, NotRegisters);
+    MadeChange |= UpdateNodeType(getChild(1)->getTypeNum(0), TP);
+    return MadeChange;
   } else if (const CodeGenIntrinsic *Int = getIntrinsicInfo(CDP)) {
     bool MadeChange = false;