TableGen: avoid string copy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274584 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/utils/TableGen/SearchableTableEmitter.cpp b/utils/TableGen/SearchableTableEmitter.cpp
index 1b0e67f835fe7c8a8d1c09a3f5c5690367473201..8c1b8804d1741feb890da1c6b4f02252259bdf3c 100644 (file)
--- a/utils/TableGen/SearchableTableEmitter.cpp
+++ b/utils/TableGen/SearchableTableEmitter.cpp
@@ -230,7 +230,7 @@ void SearchableTableEmitter::emitLookupDeclaration(StringRef Name,
 
 void SearchableTableEmitter::emitMapping(Record *InstanceClass,
                                          raw_ostream &OS) {
-  std::string TableName = InstanceClass->getName();
+  const std::string &TableName = InstanceClass->getName();
   std::vector<Record *> Items = Records.getAllDerivedDefinitions(TableName);
 
   // Gather all the records we're going to need for this particular mapping.