diff --git a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.h b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.h
index 2cd7ec1521feb..8146f54cd3db5 100644
--- a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.h
+++ b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.h
@@ -71,7 +71,7 @@ struct MachineValueTypeSet {
     return Count;
   }
   LLVM_ATTRIBUTE_ALWAYS_INLINE
-  void clear() { std::memset(Words.data(), 0, NumWords * sizeof(WordType)); }
+  void clear() { Words.fill(0); }
   LLVM_ATTRIBUTE_ALWAYS_INLINE
   bool empty() const {
     for (WordType W : Words)