[llvm] r258020 - [TableGen] Keep a returned const reference instead of making a copy. NFC

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sun Jan 17 14:38:21 2016
New Revision: 258020

URL: http://llvm.org/viewvc/llvm-project?rev=258020&view=rev
Log:
[TableGen] Keep a returned const reference instead of making a copy. NFC

Modified:
    llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp

Modified: llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp?rev=258020&r1=258019&r2=258020&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/AsmWriterEmitter.cpp Sun Jan 17 14:38:21 2016
@@ -559,7 +559,7 @@ void AsmWriterEmitter::EmitGetRegisterNa
   Record *AsmWriter = Target.getAsmWriter();
   std::string ClassName = AsmWriter->getValueAsString("AsmWriterClassName");
   const auto &Registers = Target.getRegBank().getRegisters();
-  std::vector<Record*> AltNameIndices = Target.getRegAltNameIndices();
+  const std::vector<Record*> &AltNameIndices = Target.getRegAltNameIndices();
   bool hasAltNames = AltNameIndices.size() > 1;
   std::string Namespace =
       Registers.front().TheDef->getValueAsString("Namespace");