[mlir][OpDefGen] Don't emit attribute name getters when there are no attributes

This avoids generating otherwise unnecessary methods.

diff --git a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
index 4af4902..664fc2d 100644 (file)
--- a/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp
@@ -669,6 +669,8 @@ void OpEmitter::genAttrNameGetters() {
       body << "};\n  return ::llvm::makeArrayRef(attrNames);";
     }
   }
+  if (attributeNames.empty())
+    return;
 
   // Emit the getAttributeNameForIndex methods.
   {