diff --git a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
index a259824..2f3e18c 100644
--- a/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp
@@ -1708,7 +1708,7 @@
   // register that is entirely undefined.
   LivePhysRegs LPR(HRI);
   LPR.addLiveIns(B);
-  SmallVector<std::pair<unsigned, const MachineOperand*>,2> Clobbers;
+  SmallVector<std::pair<MCPhysReg, const MachineOperand*>,2> Clobbers;
   for (auto R = B.begin(); R != It; ++R) {
     Clobbers.clear();
     LPR.stepForward(*R, Clobbers);
diff --git a/llvm/lib/Target/PowerPC/PPCExpandISEL.cpp b/llvm/lib/Target/PowerPC/PPCExpandISEL.cpp
index fe41e1b..a03e691 100644
--- a/llvm/lib/Target/PowerPC/PPCExpandISEL.cpp
+++ b/llvm/lib/Target/PowerPC/PPCExpandISEL.cpp
@@ -392,7 +392,7 @@
     // liveness state at the end of MBB (liveOut of MBB) as the liveIn for
     // NewSuccessor. Otherwise, will cause cyclic dependence.
     LivePhysRegs LPR(*MF->getSubtarget<PPCSubtarget>().getRegisterInfo());
-    SmallVector<std::pair<unsigned, const MachineOperand *>, 2> Clobbers;
+    SmallVector<std::pair<MCPhysReg, const MachineOperand *>, 2> Clobbers;
     for (MachineInstr &MI : *MBB)
       LPR.stepForward(MI, Clobbers);
     for (auto &LI : LPR)
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index ae45301..fe26389 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -2550,7 +2550,7 @@
   // call. This way they still appear live across the call.
   LivePhysRegs LiveRegs(getRegisterInfo());
   LiveRegs.addLiveOuts(MBB);
-  SmallVector<std::pair<unsigned, const MachineOperand *>, 8> Clobbers;
+  SmallVector<std::pair<MCPhysReg, const MachineOperand *>, 8> Clobbers;
   LiveRegs.stepForward(*MIB, Clobbers);
   for (const auto &C : Clobbers) {
     MIB.addReg(C.first, RegState::Implicit);