[clang-tidy] Added clang-tidy test cases related to rL310095

Differential Revision: https://reviews.llvm.org/D36308

llvm-svn: 310096

1 files changed, 4 insertions, 0 deletions

diff --git a/clang-tools-extra/test/clang-tidy/performance-inefficient-string-concatenation.cpp b/clang-tools-extra/test/clang-tidy/performance-inefficient-string-concatenation.cpp
index f4b293a04bf..1dbd56b3222 100644
--- a/clang-tools-extra/test/clang-tidy/performance-inefficient-string-concatenation.cpp
+++ b/clang-tools-extra/test/clang-tidy/performance-inefficient-string-concatenation.cpp
@@ -19,6 +19,8 @@ std::string g(std::string) {}
 int main() {
   std::string mystr1, mystr2;
   std::wstring mywstr1, mywstr2;
+  auto myautostr1 = mystr1;
+  auto myautostr2 = mystr2;
 
   for (int i = 0; i < 10; ++i) {
     f(mystr1 + mystr2 + mystr1);
@@ -33,6 +35,8 @@ int main() {
     // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: string concatenation
     mywstr1 = mywstr2 + mywstr2 + mywstr2;
     // CHECK-MESSAGES: :[[@LINE-1]]:33: warning: string concatenation
+    myautostr1 = myautostr1 + myautostr2;
+    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: string concatenation
 
     mywstr1 = mywstr2 + mywstr2;
     mystr1 = mystr2 + mystr2;