diff --git a/llvm/lib/TableGen/TGParser.cpp b/llvm/lib/TableGen/TGParser.cpp
--- a/llvm/lib/TableGen/TGParser.cpp
+++ b/llvm/lib/TableGen/TGParser.cpp
@@ -3524,7 +3524,7 @@
 
     Substs.emplace_back(QualifiedNameOfImplicitName(MC), DefmName);
 
-    if (resolve(MC->Entries, Substs, CurMultiClass == nullptr && Loops.empty(),
+    if (resolve(MC->Entries, Substs, !CurMultiClass && Loops.empty(),
                 &NewEntries, &SubClassLoc))
       return true;