diff --git a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
index 6e8e832763e7..d98fc185e5fb 100644
--- a/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/llvm/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -1946,6 +1946,8 @@ bool TreePatternNode::isIsomorphicTo(const TreePatternNode *N,
     return false;
 
   if (isLeaf()) {
+    if (getLeafValue() == N->getLeafValue())
+      return true;
     if (DefInit *DI = dyn_cast<DefInit>(getLeafValue())) {
       if (DefInit *NDI = dyn_cast<DefInit>(N->getLeafValue())) {
         return ((DI->getDef() == NDI->getDef())
@@ -1953,7 +1955,7 @@ bool TreePatternNode::isIsomorphicTo(const TreePatternNode *N,
                     || getName() == N->getName()));
       }
     }
-    return getLeafValue() == N->getLeafValue();
+    return false;
   }
 
   if (N->getOperator() != getOperator() ||