Index: clang/utils/TableGen/ClangAttrEmitter.cpp
===================================================================
--- clang/utils/TableGen/ClangAttrEmitter.cpp
+++ clang/utils/TableGen/ClangAttrEmitter.cpp
@@ -2328,11 +2328,8 @@
     // This maps spelling index values to semantic Spelling enumerants.
     SemanticSpellingMap SemanticToSyntacticMap;
 
-    std::string SpellingEnum;
-    if (!ElideSpelling)
-      SpellingEnum = CreateSemanticSpellings(Spellings, SemanticToSyntacticMap);
-    if (Header)
-      OS << SpellingEnum;
+    if (Header && Spellings.size() > 1)
+      OS <<  CreateSemanticSpellings(Spellings, SemanticToSyntacticMap);
 
     const auto &ParsedAttrSpellingItr = llvm::find_if(
         AttrMap, [R](const std::pair<std::string, const Record *> &P) {