1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/ADT/StringSet.h b/include/llvm/ADT/StringSet.h
index 3e0cc200b6dd..08626dc7af84 100644
--- a/include/llvm/ADT/StringSet.h
+++ b/include/llvm/ADT/StringSet.h
@@ -23,6 +23,11 @@ namespace llvm {
   class StringSet : public llvm::StringMap<char, AllocatorTy> {
     typedef llvm::StringMap<char, AllocatorTy> base;
   public:
+    StringSet() = default;
+    StringSet(std::initializer_list<StringRef> S) {
+      for (StringRef X : S)
+        insert(X);
+    }
 
     std::pair<typename base::iterator, bool> insert(StringRef Key) {
       assert(!Key.empty());