diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index d8a20f800b9..4d9497a96bd 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -658,11 +658,11 @@ void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
     OutStreamer.EmitCompactUnwindEncoding(MMI->getCompactUnwindEncoding());
 
   MachineModuleInfo &MMI = MF->getMMI();
-  std::vector<MCCFIInstruction> Instructions = MMI.getFrameInstructions();
+  const std::vector<MCCFIInstruction> &Instrs = MMI.getFrameInstructions();
   bool FoundOne = false;
   (void)FoundOne;
-  for (std::vector<MCCFIInstruction>::iterator I = Instructions.begin(),
-         E = Instructions.end(); I != E; ++I) {
+  for (std::vector<MCCFIInstruction>::const_iterator I = Instrs.begin(),
+         E = Instrs.end(); I != E; ++I) {
     if (I->getLabel() == Label) {
       emitCFIInstruction(*I);
       FoundOne = true;