From 2e018efa9be05c7dc30bc816e9db8b49a2791405 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Fri, 27 May 2016 13:36:58 +0000
Subject: Turn copies into references as suggested by clang-tidy's
 performance-unnecessary-copy-initialization.

llvm-svn: 270994
---
 clang/lib/Frontend/CompilerInvocation.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'clang/lib/Frontend/CompilerInvocation.cpp')

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 74e9fed..a37e1ce 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2416,7 +2416,7 @@ std::string CompilerInvocation::getModuleHash() const {
 
   // Extend the signature with the module file extensions.
   const FrontendOptions &frontendOpts = getFrontendOpts();
-  for (auto ext : frontendOpts.ModuleFileExtensions) {
+  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
     code = ext->hashExtension(code);
   }
 
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