diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 3d0194126d7..849b8d5eae9 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -461,7 +461,7 @@ static std::vector<SDOperand> getFormalArgObjects(SDOperand Op) {
   return Objs;
 }
 
-void X86TargetLowering::PreprocessCCCArguments(std::vector<SDOperand>Args,
+void X86TargetLowering::PreprocessCCCArguments(std::vector<SDOperand> &Args,
                                                Function &F, SelectionDAG &DAG) {
   unsigned NumArgs = Args.size();
   MachineFunction &MF = DAG.getMachineFunction();
@@ -895,7 +895,7 @@ HowToPassFastCCArgument(MVT::ValueType ObjectVT,
 }
 
 void
-X86TargetLowering::PreprocessFastCCArguments(std::vector<SDOperand>Args,
+X86TargetLowering::PreprocessFastCCArguments(std::vector<SDOperand> &Args,
                                              Function &F, SelectionDAG &DAG) {
   unsigned NumArgs = Args.size();
   MachineFunction &MF = DAG.getMachineFunction();
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index f20a65c635b..0d93ec4294f 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -369,7 +369,7 @@ namespace llvm {
     std::vector<std::pair<FALocInfo, FALocInfo> > FormalArgLocs;
 
     // C Calling Convention implementation.
-    void PreprocessCCCArguments(std::vector<SDOperand>Args, Function &F,
+    void PreprocessCCCArguments(std::vector<SDOperand> &Args, Function &F,
                                 SelectionDAG &DAG);
     void LowerCCCArguments(SDOperand Op, SelectionDAG &DAG);
     std::pair<SDOperand, SDOperand>
@@ -379,7 +379,7 @@ namespace llvm {
 
     // Fast Calling Convention implementation.
     void
-    PreprocessFastCCArguments(std::vector<SDOperand>Args, Function &F,
+    PreprocessFastCCArguments(std::vector<SDOperand> &Args, Function &F,
                               SelectionDAG &DAG);
     void
     LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG);