diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index cd68696..22a7ef2 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -19,6 +19,7 @@
 #include "llvm/CodeGen/MachineOperand.h"
 #include "llvm/MC/MCInstrDesc.h"
 #include "llvm/Target/TargetOpcodes.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/ilist.h"
 #include "llvm/ADT/ilist_node.h"
 #include "llvm/ADT/STLExtras.h"
@@ -791,7 +792,7 @@
 
   /// setPhysRegsDeadExcept - Mark every physreg used by this instruction as
   /// dead except those in the UsedRegs list.
-  void setPhysRegsDeadExcept(const SmallVectorImpl<unsigned> &UsedRegs,
+  void setPhysRegsDeadExcept(ArrayRef<unsigned> UsedRegs,
                              const TargetRegisterInfo &TRI);
 
   /// isSafeToMove - Return true if it is safe to move this instruction. If
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index f04921b..6ce01a46 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1793,7 +1793,7 @@
                                        true  /*IsImp*/));
 }
 
-void MachineInstr::setPhysRegsDeadExcept(const SmallVectorImpl<unsigned> &UsedRegs,
+void MachineInstr::setPhysRegsDeadExcept(ArrayRef<unsigned> UsedRegs,
                                          const TargetRegisterInfo &TRI) {
   for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
     MachineOperand &MO = getOperand(i);
@@ -1801,8 +1801,8 @@
     unsigned Reg = MO.getReg();
     if (!TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
     bool Dead = true;
-    for (SmallVectorImpl<unsigned>::const_iterator I = UsedRegs.begin(),
-         E = UsedRegs.end(); I != E; ++I)
+    for (ArrayRef<unsigned>::iterator I = UsedRegs.begin(), E = UsedRegs.end();
+         I != E; ++I)
       if (TRI.regsOverlap(*I, Reg)) {
         Dead = false;
         break;