[llvm] r284065 - [unittest] Pass a reference instead of making a copy (NFC)

[Vedant Kumar via llvm-commits]

Author: vedantk
Date: Wed Oct 12 17:27:52 2016
New Revision: 284065

URL: http://llvm.org/viewvc/llvm-project?rev=284065&view=rev
Log:
[unittest] Pass a reference instead of making a copy (NFC)

Modified:
    llvm/trunk/unittests/ProfileData/CoverageMappingTest.cpp

Modified: llvm/trunk/unittests/ProfileData/CoverageMappingTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/ProfileData/CoverageMappingTest.cpp?rev=284065&r1=284064&r2=284065&view=diff
==============================================================================
--- llvm/trunk/unittests/ProfileData/CoverageMappingTest.cpp (original)
+++ llvm/trunk/unittests/ProfileData/CoverageMappingTest.cpp Wed Oct 12 17:27:52 2016
@@ -164,7 +164,7 @@ struct CoverageMappingTest : ::testing::
     return OS.str();
   }
 
-  void readCoverageRegions(std::string Coverage,
+  void readCoverageRegions(const std::string &Coverage,
                            OutputFunctionCoverageData &Data) {
     SmallVector<StringRef, 8> Filenames(Files.size());
     for (const auto &E : Files)