diff --git a/llvm/include/llvm/ADT/SmallVector.h b/llvm/include/llvm/ADT/SmallVector.h
--- a/llvm/include/llvm/ADT/SmallVector.h
+++ b/llvm/include/llvm/ADT/SmallVector.h
@@ -1112,7 +1112,7 @@
 /// to avoid allocating unnecessary storage.
 template <typename T, unsigned N>
 struct SmallVectorStorage {
-  alignas(T) char InlineElts[N * sizeof(T)];
+  alignas(T) char InlineElts[N * sizeof(T)]{};
 };
 
 /// We need the storage to be properly aligned even for small-size of 0 so that