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
@@ -1212,7 +1212,7 @@
   }
 
   SmallVector(std::initializer_list<T> IL) : SmallVectorImpl<T>(N) {
-    this->assign(IL);
+    this->append(IL);
   }
 
   SmallVector(const SmallVector &RHS) : SmallVectorImpl<T>(N) {