From 363ed37c5ee18accb6b93b72ade7969c1751d98f Mon Sep 17 00:00:00 2001
From: Reid Kleckner <reid@kleckner.net>
Date: Wed, 12 Feb 2014 19:26:24 +0000
Subject: [PATCH] Attributes: Avoid a big useless copy in the emitter

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201251 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/ClangAttrEmitter.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/TableGen/ClangAttrEmitter.cpp b/utils/TableGen/ClangAttrEmitter.cpp
index 63225767c2..cd812cb1e9 100644
--- a/utils/TableGen/ClangAttrEmitter.cpp
+++ b/utils/TableGen/ClangAttrEmitter.cpp
@@ -607,7 +607,8 @@ namespace {
   };
 
   // Unique the enums, but maintain the original declaration ordering.
-  std::vector<std::string> uniqueEnumsInOrder(std::vector<std::string> enums) {
+  std::vector<std::string>
+  uniqueEnumsInOrder(const std::vector<std::string> &enums) {
     std::vector<std::string> uniques;
     std::set<std::string> unique_set(enums.begin(), enums.end());
     for (std::vector<std::string>::const_iterator i = enums.begin(),
-- 
2.50.1