diff --git a/llvm/include/llvm/CodeGen/TargetInstrInfo.h b/llvm/include/llvm/CodeGen/TargetInstrInfo.h
index c8eba71c9bb0..9e7893d5c414 100644
--- a/llvm/include/llvm/CodeGen/TargetInstrInfo.h
+++ b/llvm/include/llvm/CodeGen/TargetInstrInfo.h
@@ -1035,7 +1035,7 @@ public:
   /// marked renamable.
   virtual void copyPhysReg(MachineBasicBlock &MBB,
                            MachineBasicBlock::iterator MI, const DebugLoc &DL,
-                           MCRegister DestReg, MCRegister SrcReg, bool KillSrc,
+                           Register DestReg, Register SrcReg, bool KillSrc,
                            bool RenamableDest = false,
                            bool RenamableSrc = false) const {
     llvm_unreachable("Target didn't implement TargetInstrInfo::copyPhysReg!");
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index efa03d4a1035..1d600e87230f 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -4988,8 +4988,8 @@ void AArch64InstrInfo::copyGPRRegTuple(MachineBasicBlock &MBB,
 
 void AArch64InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator I,
-                                   const DebugLoc &DL, MCRegister DestReg,
-                                   MCRegister SrcReg, bool KillSrc,
+                                   const DebugLoc &DL, Register DestReg,
+                                   Register SrcReg, bool KillSrc,
                                    bool RenamableDest,
                                    bool RenamableSrc) const {
   if (AArch64::GPR32spRegClass.contains(DestReg) &&
@@ -5068,8 +5068,8 @@ void AArch64InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     auto ToPPR = [](MCRegister R) -> MCRegister {
       return (R - AArch64::PN0) + AArch64::P0;
     };
-    MCRegister PPRSrcReg = SrcIsPNR ? ToPPR(SrcReg) : SrcReg;
-    MCRegister PPRDestReg = DestIsPNR ? ToPPR(DestReg) : DestReg;
+    MCRegister PPRSrcReg = SrcIsPNR ? ToPPR(SrcReg) : SrcReg.asMCReg();
+    MCRegister PPRDestReg = DestIsPNR ? ToPPR(DestReg) : DestReg.asMCReg();
 
     if (PPRSrcReg != PPRDestReg) {
       auto NewMI = BuildMI(MBB, I, DL, get(AArch64::ORR_PPzPP), PPRDestReg)
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.h b/llvm/lib/Target/AArch64/AArch64InstrInfo.h
index f7a1485cdd26..3eab98139fa7 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.h
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.h
@@ -343,7 +343,7 @@ public:
                        bool KillSrc, unsigned Opcode, unsigned ZeroReg,
                        llvm::ArrayRef<unsigned> Indices) const;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/AMDGPU/R600InstrInfo.cpp b/llvm/lib/Target/AMDGPU/R600InstrInfo.cpp
index 1c4a992c8727..fb586fa09032 100644
--- a/llvm/lib/Target/AMDGPU/R600InstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/R600InstrInfo.cpp
@@ -37,8 +37,8 @@ bool R600InstrInfo::isVector(const MachineInstr &MI) const {
 
 void R600InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MI,
-                                const DebugLoc &DL, MCRegister DestReg,
-                                MCRegister SrcReg, bool KillSrc,
+                                const DebugLoc &DL, Register DestReg,
+                                Register SrcReg, bool KillSrc,
                                 bool RenamableDest, bool RenamableSrc) const {
   unsigned VectorComponents = 0;
   if ((R600::R600_Reg128RegClass.contains(DestReg) ||
diff --git a/llvm/lib/Target/AMDGPU/R600InstrInfo.h b/llvm/lib/Target/AMDGPU/R600InstrInfo.h
index a403c65141fe..68bbac103cb9 100644
--- a/llvm/lib/Target/AMDGPU/R600InstrInfo.h
+++ b/llvm/lib/Target/AMDGPU/R600InstrInfo.h
@@ -73,7 +73,7 @@ public:
   }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   bool isLegalToSplitMBBAt(MachineBasicBlock &MBB,
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
index 2cf6de73fa90..d5d54337306c 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
@@ -801,9 +801,9 @@ static void expandSGPRCopy(const SIInstrInfo &TII, MachineBasicBlock &MBB,
 
 void SIInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator MI,
-                              const DebugLoc &DL, MCRegister DestReg,
-                              MCRegister SrcReg, bool KillSrc,
-                              bool RenamableDest, bool RenamableSrc) const {
+                              const DebugLoc &DL, Register DestReg,
+                              Register SrcReg, bool KillSrc, bool RenamableDest,
+                              bool RenamableSrc) const {
   const TargetRegisterClass *RC = RI.getPhysRegBaseClass(DestReg);
   unsigned Size = RI.getRegSizeInBits(*RC);
   const TargetRegisterClass *SrcRC = RI.getPhysRegBaseClass(SrcReg);
@@ -816,7 +816,7 @@ void SIInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
     if (((Size == 16) != (SrcSize == 16))) {
       // Non-VGPR Src and Dst will later be expanded back to 32 bits.
       assert(ST.hasTrue16BitInsts());
-      MCRegister &RegToFix = (Size == 32) ? DestReg : SrcReg;
+      Register &RegToFix = (Size == 32) ? DestReg : SrcReg;
       MCRegister SubReg = RI.getSubReg(RegToFix, AMDGPU::lo16);
       RegToFix = SubReg;
 
diff --git a/llvm/lib/Target/AMDGPU/SIInstrInfo.h b/llvm/lib/Target/AMDGPU/SIInstrInfo.h
index 79ecc2a657ed..428322a5a2f0 100644
--- a/llvm/lib/Target/AMDGPU/SIInstrInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIInstrInfo.h
@@ -263,7 +263,7 @@ public:
                                int64_t Offset1, unsigned NumLoads) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/ARC/ARCInstrInfo.cpp b/llvm/lib/Target/ARC/ARCInstrInfo.cpp
index aa30c8a2a96d..8a89bdb546f3 100644
--- a/llvm/lib/Target/ARC/ARCInstrInfo.cpp
+++ b/llvm/lib/Target/ARC/ARCInstrInfo.cpp
@@ -280,8 +280,8 @@ unsigned ARCInstrInfo::removeBranch(MachineBasicBlock &MBB,
 
 void ARCInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator I,
-                               const DebugLoc &DL, MCRegister DestReg,
-                               MCRegister SrcReg, bool KillSrc,
+                               const DebugLoc &DL, Register DestReg,
+                               Register SrcReg, bool KillSrc,
                                bool RenamableDest, bool RenamableSrc) const {
   assert(ARC::GPR32RegClass.contains(SrcReg) &&
          "Only GPR32 src copy supported.");
diff --git a/llvm/lib/Target/ARC/ARCInstrInfo.h b/llvm/lib/Target/ARC/ARCInstrInfo.h
index 8861b4689925..2cf05ba57bd4 100644
--- a/llvm/lib/Target/ARC/ARCInstrInfo.h
+++ b/llvm/lib/Target/ARC/ARCInstrInfo.h
@@ -64,7 +64,7 @@ public:
                         int *BytesRemoved = nullptr) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 839b7e81f899..71fe990e5ab7 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -889,8 +889,8 @@ void llvm::addPredicatedMveVpredROp(MachineInstrBuilder &MIB,
 
 void ARMBaseInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator I,
-                                   const DebugLoc &DL, MCRegister DestReg,
-                                   MCRegister SrcReg, bool KillSrc,
+                                   const DebugLoc &DL, Register DestReg,
+                                   Register SrcReg, bool KillSrc,
                                    bool RenamableDest,
                                    bool RenamableSrc) const {
   bool GPRDest = ARM::GPRRegClass.contains(DestReg);
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.h b/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
index ae760e881e7f..35edd5bf003e 100644
--- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
+++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.h
@@ -208,7 +208,7 @@ public:
                     const ARMSubtarget &Subtarget) const;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/ARM/Thumb1InstrInfo.cpp b/llvm/lib/Target/ARM/Thumb1InstrInfo.cpp
index cf151e1f8458..ce4ee157289d 100644
--- a/llvm/lib/Target/ARM/Thumb1InstrInfo.cpp
+++ b/llvm/lib/Target/ARM/Thumb1InstrInfo.cpp
@@ -41,8 +41,8 @@ unsigned Thumb1InstrInfo::getUnindexedOpcode(unsigned Opc) const {
 
 void Thumb1InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator I,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   // Need to check the arch.
   MachineFunction &MF = *MBB.getParent();
diff --git a/llvm/lib/Target/ARM/Thumb1InstrInfo.h b/llvm/lib/Target/ARM/Thumb1InstrInfo.h
index b9eb58692bab..68b326c0ebef 100644
--- a/llvm/lib/Target/ARM/Thumb1InstrInfo.h
+++ b/llvm/lib/Target/ARM/Thumb1InstrInfo.h
@@ -38,7 +38,7 @@ public:
   const ThumbRegisterInfo &getRegisterInfo() const override { return RI; }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   void storeRegToStackSlot(
diff --git a/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp b/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp
index 3e7bd05b1d9d..8b254fafc438 100644
--- a/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp
+++ b/llvm/lib/Target/ARM/Thumb2InstrInfo.cpp
@@ -149,8 +149,8 @@ Thumb2InstrInfo::optimizeSelect(MachineInstr &MI,
 
 void Thumb2InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator I,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   // Handle SPR, DPR, and QPR copies.
   if (!ARM::GPRRegClass.contains(DestReg, SrcReg))
diff --git a/llvm/lib/Target/ARM/Thumb2InstrInfo.h b/llvm/lib/Target/ARM/Thumb2InstrInfo.h
index 7e751c5b6bb9..3ec3a6216b9f 100644
--- a/llvm/lib/Target/ARM/Thumb2InstrInfo.h
+++ b/llvm/lib/Target/ARM/Thumb2InstrInfo.h
@@ -38,7 +38,7 @@ public:
                            MachineBasicBlock::iterator MBBI) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/AVR/AVRInstrInfo.cpp b/llvm/lib/Target/AVR/AVRInstrInfo.cpp
index 5ba83b616db3..601068bf1793 100644
--- a/llvm/lib/Target/AVR/AVRInstrInfo.cpp
+++ b/llvm/lib/Target/AVR/AVRInstrInfo.cpp
@@ -35,8 +35,8 @@ AVRInstrInfo::AVRInstrInfo(AVRSubtarget &STI)
 
 void AVRInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator MI,
-                               const DebugLoc &DL, MCRegister DestReg,
-                               MCRegister SrcReg, bool KillSrc,
+                               const DebugLoc &DL, Register DestReg,
+                               Register SrcReg, bool KillSrc,
                                bool RenamableDest, bool RenamableSrc) const {
   const AVRRegisterInfo &TRI = *STI.getRegisterInfo();
   unsigned Opc;
diff --git a/llvm/lib/Target/AVR/AVRInstrInfo.h b/llvm/lib/Target/AVR/AVRInstrInfo.h
index 452160a06663..1c92f173d254 100644
--- a/llvm/lib/Target/AVR/AVRInstrInfo.h
+++ b/llvm/lib/Target/AVR/AVRInstrInfo.h
@@ -74,7 +74,7 @@ public:
   unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   void storeRegToStackSlot(
diff --git a/llvm/lib/Target/BPF/BPFInstrInfo.cpp b/llvm/lib/Target/BPF/BPFInstrInfo.cpp
index c79fb99ba5cf..70bc163615f6 100644
--- a/llvm/lib/Target/BPF/BPFInstrInfo.cpp
+++ b/llvm/lib/Target/BPF/BPFInstrInfo.cpp
@@ -30,8 +30,8 @@ BPFInstrInfo::BPFInstrInfo()
 
 void BPFInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator I,
-                               const DebugLoc &DL, MCRegister DestReg,
-                               MCRegister SrcReg, bool KillSrc,
+                               const DebugLoc &DL, Register DestReg,
+                               Register SrcReg, bool KillSrc,
                                bool RenamableDest, bool RenamableSrc) const {
   if (BPF::GPRRegClass.contains(DestReg, SrcReg))
     BuildMI(MBB, I, DL, get(BPF::MOV_rr), DestReg)
diff --git a/llvm/lib/Target/BPF/BPFInstrInfo.h b/llvm/lib/Target/BPF/BPFInstrInfo.h
index 904d94d47e47..d8bbad44e314 100644
--- a/llvm/lib/Target/BPF/BPFInstrInfo.h
+++ b/llvm/lib/Target/BPF/BPFInstrInfo.h
@@ -30,7 +30,7 @@ public:
   const BPFRegisterInfo &getRegisterInfo() const { return RI; }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/CSKY/CSKYInstrInfo.cpp b/llvm/lib/Target/CSKY/CSKYInstrInfo.cpp
index 75d581382fe5..ccb3f16394d4 100644
--- a/llvm/lib/Target/CSKY/CSKYInstrInfo.cpp
+++ b/llvm/lib/Target/CSKY/CSKYInstrInfo.cpp
@@ -476,8 +476,8 @@ void CSKYInstrInfo::loadRegFromStackSlot(
 
 void CSKYInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator I,
-                                const DebugLoc &DL, MCRegister DestReg,
-                                MCRegister SrcReg, bool KillSrc,
+                                const DebugLoc &DL, Register DestReg,
+                                Register SrcReg, bool KillSrc,
                                 bool RenamableDest, bool RenamableSrc) const {
   if (CSKY::GPRRegClass.contains(SrcReg) &&
       CSKY::CARRYRegClass.contains(DestReg)) {
diff --git a/llvm/lib/Target/CSKY/CSKYInstrInfo.h b/llvm/lib/Target/CSKY/CSKYInstrInfo.h
index 3e0166ecf8e0..98f583e8b405 100644
--- a/llvm/lib/Target/CSKY/CSKYInstrInfo.h
+++ b/llvm/lib/Target/CSKY/CSKYInstrInfo.h
@@ -53,7 +53,7 @@ public:
       MachineInstr::MIFlag Flags = MachineInstr::NoFlags) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp b/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
index bd6ece19f9ad..b80cd2961f1b 100644
--- a/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonInstrInfo.cpp
@@ -858,8 +858,8 @@ static void getLiveOutRegsAt(LivePhysRegs &Regs, const MachineInstr &MI) {
 
 void HexagonInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator I,
-                                   const DebugLoc &DL, MCRegister DestReg,
-                                   MCRegister SrcReg, bool KillSrc,
+                                   const DebugLoc &DL, Register DestReg,
+                                   Register SrcReg, bool KillSrc,
                                    bool RenamableDest,
                                    bool RenamableSrc) const {
   const HexagonRegisterInfo &HRI = *Subtarget.getRegisterInfo();
diff --git a/llvm/lib/Target/Hexagon/HexagonInstrInfo.h b/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
index 2debdde78bfb..b8f345581b7a 100644
--- a/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
+++ b/llvm/lib/Target/Hexagon/HexagonInstrInfo.h
@@ -173,7 +173,7 @@ public:
   /// careful implementation when multiple copy instructions are required for
   /// large registers. See for example the ARM target.
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/Lanai/LanaiInstrInfo.cpp b/llvm/lib/Target/Lanai/LanaiInstrInfo.cpp
index bd13c79ca79d..1aeedd531c4a 100644
--- a/llvm/lib/Target/Lanai/LanaiInstrInfo.cpp
+++ b/llvm/lib/Target/Lanai/LanaiInstrInfo.cpp
@@ -32,8 +32,8 @@ LanaiInstrInfo::LanaiInstrInfo()
 void LanaiInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator Position,
                                  const DebugLoc &DL,
-                                 MCRegister DestinationRegister,
-                                 MCRegister SourceRegister, bool KillSource,
+                                 Register DestinationRegister,
+                                 Register SourceRegister, bool KillSource,
                                  bool RenamableDest, bool RenamableSrc) const {
   if (!Lanai::GPRRegClass.contains(DestinationRegister, SourceRegister)) {
     llvm_unreachable("Impossible reg-to-reg copy");
diff --git a/llvm/lib/Target/Lanai/LanaiInstrInfo.h b/llvm/lib/Target/Lanai/LanaiInstrInfo.h
index 13cf2b357103..07b1e87dc8b2 100644
--- a/llvm/lib/Target/Lanai/LanaiInstrInfo.h
+++ b/llvm/lib/Target/Lanai/LanaiInstrInfo.h
@@ -48,8 +48,8 @@ public:
                               int &FrameIndex) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator Position,
-                   const DebugLoc &DL, MCRegister DestinationRegister,
-                   MCRegister SourceRegister, bool KillSource,
+                   const DebugLoc &DL, Register DestinationRegister,
+                   Register SourceRegister, bool KillSource,
                    bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp
index 903ee76fbc8d..26d36f1c5058 100644
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.cpp
@@ -39,8 +39,8 @@ MCInst LoongArchInstrInfo::getNop() const {
 
 void LoongArchInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator MBBI,
-                                     const DebugLoc &DL, MCRegister DstReg,
-                                     MCRegister SrcReg, bool KillSrc,
+                                     const DebugLoc &DL, Register DstReg,
+                                     Register SrcReg, bool KillSrc,
                                      bool RenamableDest,
                                      bool RenamableSrc) const {
   if (LoongArch::GPRRegClass.contains(DstReg, SrcReg)) {
diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.h b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.h
index 08dc54dbfe98..63b7112b8b40 100644
--- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.h
+++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.h
@@ -30,7 +30,7 @@ public:
   MCInst getNop() const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
-                   const DebugLoc &DL, MCRegister DstReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DstReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/M68k/M68kInstrInfo.cpp b/llvm/lib/Target/M68k/M68kInstrInfo.cpp
index febd020f3f2a..568938f1f50b 100644
--- a/llvm/lib/Target/M68k/M68kInstrInfo.cpp
+++ b/llvm/lib/Target/M68k/M68kInstrInfo.cpp
@@ -705,8 +705,8 @@ bool M68kInstrInfo::isPCRelRegisterOperandLegal(
 
 void M68kInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                 MachineBasicBlock::iterator MI,
-                                const DebugLoc &DL, MCRegister DstReg,
-                                MCRegister SrcReg, bool KillSrc,
+                                const DebugLoc &DL, Register DstReg,
+                                Register SrcReg, bool KillSrc,
                                 bool RenamableDest, bool RenamableSrc) const {
   unsigned Opc = 0;
 
diff --git a/llvm/lib/Target/M68k/M68kInstrInfo.h b/llvm/lib/Target/M68k/M68kInstrInfo.h
index b72fd7a53b93..97615d60caa0 100644
--- a/llvm/lib/Target/M68k/M68kInstrInfo.h
+++ b/llvm/lib/Target/M68k/M68kInstrInfo.h
@@ -270,7 +270,7 @@ public:
                         int *BytesAdded = nullptr) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/MSP430/MSP430InstrInfo.cpp b/llvm/lib/Target/MSP430/MSP430InstrInfo.cpp
index 3018d97f66b8..8bc6387e6a7e 100644
--- a/llvm/lib/Target/MSP430/MSP430InstrInfo.cpp
+++ b/llvm/lib/Target/MSP430/MSP430InstrInfo.cpp
@@ -83,8 +83,8 @@ void MSP430InstrInfo::loadRegFromStackSlot(
 
 void MSP430InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator I,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   unsigned Opc;
   if (MSP430::GR16RegClass.contains(DestReg, SrcReg))
diff --git a/llvm/lib/Target/MSP430/MSP430InstrInfo.h b/llvm/lib/Target/MSP430/MSP430InstrInfo.h
index 71395557454e..58be64336f26 100644
--- a/llvm/lib/Target/MSP430/MSP430InstrInfo.h
+++ b/llvm/lib/Target/MSP430/MSP430InstrInfo.h
@@ -36,7 +36,7 @@ public:
   const MSP430RegisterInfo &getRegisterInfo() const { return RI; }
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/Mips/Mips16InstrInfo.cpp b/llvm/lib/Target/Mips/Mips16InstrInfo.cpp
index 351caf55062e..cafc11b8a0d9 100644
--- a/llvm/lib/Target/Mips/Mips16InstrInfo.cpp
+++ b/llvm/lib/Target/Mips/Mips16InstrInfo.cpp
@@ -65,8 +65,8 @@ Register Mips16InstrInfo::isStoreToStackSlot(const MachineInstr &MI,
 
 void Mips16InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator I,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   unsigned Opc = 0;
 
diff --git a/llvm/lib/Target/Mips/Mips16InstrInfo.h b/llvm/lib/Target/Mips/Mips16InstrInfo.h
index 095a1b2239a3..1058e8c25fb5 100644
--- a/llvm/lib/Target/Mips/Mips16InstrInfo.h
+++ b/llvm/lib/Target/Mips/Mips16InstrInfo.h
@@ -49,7 +49,7 @@ public:
                               int &FrameIndex) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
index c245a18ae0be..caa20f72aacf 100644
--- a/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
+++ b/llvm/lib/Target/Mips/MipsSEInstrInfo.cpp
@@ -79,8 +79,8 @@ Register MipsSEInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
 
 void MipsSEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator I,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   unsigned Opc = 0, ZeroReg = 0;
   bool isMicroMips = Subtarget.inMicroMipsMode();
diff --git a/llvm/lib/Target/Mips/MipsSEInstrInfo.h b/llvm/lib/Target/Mips/MipsSEInstrInfo.h
index 9004254857f3..2b4f55d184b8 100644
--- a/llvm/lib/Target/Mips/MipsSEInstrInfo.h
+++ b/llvm/lib/Target/Mips/MipsSEInstrInfo.h
@@ -43,7 +43,7 @@ public:
                               int &FrameIndex) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/NVPTX/NVPTXInstrInfo.cpp b/llvm/lib/Target/NVPTX/NVPTXInstrInfo.cpp
index b4dbe6a0930c..18b513039ece 100644
--- a/llvm/lib/Target/NVPTX/NVPTXInstrInfo.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXInstrInfo.cpp
@@ -28,8 +28,8 @@ NVPTXInstrInfo::NVPTXInstrInfo() : RegInfo() {}
 
 void NVPTXInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator I,
-                                 const DebugLoc &DL, MCRegister DestReg,
-                                 MCRegister SrcReg, bool KillSrc,
+                                 const DebugLoc &DL, Register DestReg,
+                                 Register SrcReg, bool KillSrc,
                                  bool RenamableDest, bool RenamableSrc) const {
   const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
   const TargetRegisterClass *DestRC = MRI.getRegClass(DestReg);
diff --git a/llvm/lib/Target/NVPTX/NVPTXInstrInfo.h b/llvm/lib/Target/NVPTX/NVPTXInstrInfo.h
index 06b111c69fb7..95464dbbd176 100644
--- a/llvm/lib/Target/NVPTX/NVPTXInstrInfo.h
+++ b/llvm/lib/Target/NVPTX/NVPTXInstrInfo.h
@@ -51,7 +51,7 @@ public:
    */
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index 3aef6f2c893f..9b526066fe75 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -1675,8 +1675,8 @@ static unsigned getCRBitValue(unsigned CRBit) {
 
 void PPCInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator I,
-                               const DebugLoc &DL, MCRegister DestReg,
-                               MCRegister SrcReg, bool KillSrc,
+                               const DebugLoc &DL, Register DestReg,
+                               Register SrcReg, bool KillSrc,
                                bool RenamableDest, bool RenamableSrc) const {
   // We can end up with self copies and similar things as a result of VSX copy
   // legalization. Promote them here.
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.h b/llvm/lib/Target/PowerPC/PPCInstrInfo.h
index 69279efe5c15..d4554379cdb1 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.h
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.h
@@ -457,7 +457,7 @@ public:
                     Register FalseReg) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfo.cpp b/llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
index f50789f5963b..bca508e2136a 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
@@ -452,8 +452,8 @@ void RISCVInstrInfo::copyPhysRegVector(
 
 void RISCVInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator MBBI,
-                                 const DebugLoc &DL, MCRegister DstReg,
-                                 MCRegister SrcReg, bool KillSrc,
+                                 const DebugLoc &DL, Register DstReg,
+                                 Register SrcReg, bool KillSrc,
                                  bool RenamableDest, bool RenamableSrc) const {
   const TargetRegisterInfo *TRI = STI.getRegisterInfo();
 
diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfo.h b/llvm/lib/Target/RISCV/RISCVInstrInfo.h
index 95d79da771dd..1c46d761a7e1 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfo.h
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfo.h
@@ -88,7 +88,7 @@ public:
                          MCRegister DstReg, MCRegister SrcReg, bool KillSrc,
                          const TargetRegisterClass *RegClass) const;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
-                   const DebugLoc &DL, MCRegister DstReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DstReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.cpp b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.cpp
index 49b6b3bbb6ce..34acc3c98d8f 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.cpp
@@ -258,8 +258,8 @@ unsigned SPIRVInstrInfo::insertBranch(MachineBasicBlock &MBB,
 
 void SPIRVInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator I,
-                                 const DebugLoc &DL, MCRegister DestReg,
-                                 MCRegister SrcReg, bool KillSrc,
+                                 const DebugLoc &DL, Register DestReg,
+                                 Register SrcReg, bool KillSrc,
                                  bool RenamableDest, bool RenamableSrc) const {
   // Actually we don't need this COPY instruction. However if we do nothing with
   // it, post RA pseudo instrs expansion just removes it and we get the code
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.h b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.h
index 4e5059b4b889..577e7f6ae9ff 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstrInfo.h
+++ b/llvm/lib/Target/SPIRV/SPIRVInstrInfo.h
@@ -51,7 +51,7 @@ public:
                         const DebugLoc &DL,
                         int *BytesAdded = nullptr) const override;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   bool expandPostRAPseudo(MachineInstr &MI) const override;
diff --git a/llvm/lib/Target/Sparc/SparcInstrInfo.cpp b/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
index 225d6cd80f90..a7fbbd4044c1 100644
--- a/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/llvm/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -435,8 +435,8 @@ bool SparcInstrInfo::isBranchOffsetInRange(unsigned BranchOpc,
 
 void SparcInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator I,
-                                 const DebugLoc &DL, MCRegister DestReg,
-                                 MCRegister SrcReg, bool KillSrc,
+                                 const DebugLoc &DL, Register DestReg,
+                                 Register SrcReg, bool KillSrc,
                                  bool RenamableDest, bool RenamableSrc) const {
   unsigned numSubRegs = 0;
   unsigned movOpc     = 0;
diff --git a/llvm/lib/Target/Sparc/SparcInstrInfo.h b/llvm/lib/Target/Sparc/SparcInstrInfo.h
index 552e7c52be26..1feb12ba2fda 100644
--- a/llvm/lib/Target/Sparc/SparcInstrInfo.h
+++ b/llvm/lib/Target/Sparc/SparcInstrInfo.h
@@ -86,7 +86,7 @@ public:
   bool isBranchOffsetInRange(unsigned BranchOpc, int64_t Offset) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
index 8a32d998fce2..ab2e5b3c9a19 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
@@ -857,8 +857,8 @@ bool SystemZInstrInfo::PredicateInstruction(
 
 void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                    MachineBasicBlock::iterator MBBI,
-                                   const DebugLoc &DL, MCRegister DestReg,
-                                   MCRegister SrcReg, bool KillSrc,
+                                   const DebugLoc &DL, Register DestReg,
+                                   Register SrcReg, bool KillSrc,
                                    bool RenamableDest,
                                    bool RenamableSrc) const {
   // Split 128-bit GPR moves into two 64-bit moves. Add implicit uses of the
@@ -906,7 +906,7 @@ void SystemZInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
         RI.getMatchingSuperReg(RI.getSubReg(DestReg, SystemZ::subreg_l64),
                                SystemZ::subreg_h64, &SystemZ::VR128BitRegClass);
 
-    if (DestRegHi != SrcReg)
+    if (DestRegHi != SrcReg.asMCReg())
       copyPhysReg(MBB, MBBI, DL, DestRegHi, SrcReg, false);
     BuildMI(MBB, MBBI, DL, get(SystemZ::VREPG), DestRegLo)
       .addReg(SrcReg, getKillRegState(KillSrc)).addImm(1);
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.h b/llvm/lib/Target/SystemZ/SystemZInstrInfo.h
index 3d709a24db36..5f09ad508905 100644
--- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.h
+++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.h
@@ -275,7 +275,7 @@ public:
   bool PredicateInstruction(MachineInstr &MI,
                             ArrayRef<MachineOperand> Pred) const override;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   void storeRegToStackSlot(
diff --git a/llvm/lib/Target/VE/VEInstrInfo.cpp b/llvm/lib/Target/VE/VEInstrInfo.cpp
index 3ace8e7eae92..98e4b452a8a5 100644
--- a/llvm/lib/Target/VE/VEInstrInfo.cpp
+++ b/llvm/lib/Target/VE/VEInstrInfo.cpp
@@ -357,9 +357,8 @@ static void copyPhysSubRegs(MachineBasicBlock &MBB,
 
 void VEInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator I, const DebugLoc &DL,
-                              MCRegister DestReg, MCRegister SrcReg,
-                              bool KillSrc, bool RenamableDest,
-                              bool RenamableSrc) const {
+                              Register DestReg, Register SrcReg, bool KillSrc,
+                              bool RenamableDest, bool RenamableSrc) const {
 
   if (IsAliasOfSX(SrcReg) && IsAliasOfSX(DestReg)) {
     BuildMI(MBB, I, DL, get(VE::ORri), DestReg)
diff --git a/llvm/lib/Target/VE/VEInstrInfo.h b/llvm/lib/Target/VE/VEInstrInfo.h
index 210ce1a8a266..49dcba503462 100644
--- a/llvm/lib/Target/VE/VEInstrInfo.h
+++ b/llvm/lib/Target/VE/VEInstrInfo.h
@@ -80,7 +80,7 @@ public:
   /// } Branch Analysis & Modification
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.cpp
index 75011ab3c872..a934853ff9f4 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.cpp
@@ -56,15 +56,15 @@ bool WebAssemblyInstrInfo::isReallyTriviallyReMaterializable(
 
 void WebAssemblyInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                        MachineBasicBlock::iterator I,
-                                       const DebugLoc &DL, MCRegister DestReg,
-                                       MCRegister SrcReg, bool KillSrc,
+                                       const DebugLoc &DL, Register DestReg,
+                                       Register SrcReg, bool KillSrc,
                                        bool RenamableDest,
                                        bool RenamableSrc) const {
   // This method is called by post-RA expansion, which expects only pregs to
   // exist. However we need to handle both here.
   auto &MRI = MBB.getParent()->getRegInfo();
   const TargetRegisterClass *RC =
-      Register::isVirtualRegister(DestReg)
+      DestReg.isVirtual()
           ? MRI.getRegClass(DestReg)
           : MRI.getTargetRegisterInfo()->getMinimalPhysRegClass(DestReg);
 
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.h b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.h
index 474f04628066..ba00097034bf 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.h
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.h
@@ -40,7 +40,7 @@ public:
   bool isReallyTriviallyReMaterializable(const MachineInstr &MI) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   MachineInstr *commuteInstructionImpl(MachineInstr &MI, bool NewMI,
diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index d756e73659a2..5fe7203c052d 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -4309,8 +4309,8 @@ static unsigned CopyToFromAsymmetricReg(unsigned DestReg, unsigned SrcReg,
 
 void X86InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                MachineBasicBlock::iterator MI,
-                               const DebugLoc &DL, MCRegister DestReg,
-                               MCRegister SrcReg, bool KillSrc,
+                               const DebugLoc &DL, Register DestReg,
+                               Register SrcReg, bool KillSrc,
                                bool RenamableDest, bool RenamableSrc) const {
   // First deal with the normal symmetric copies.
   bool HasAVX = Subtarget.hasAVX();
diff --git a/llvm/lib/Target/X86/X86InstrInfo.h b/llvm/lib/Target/X86/X86InstrInfo.h
index e499f925f48e..f383eaddfd0b 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.h
+++ b/llvm/lib/Target/X86/X86InstrInfo.h
@@ -418,7 +418,7 @@ public:
                     ArrayRef<MachineOperand> Cond, Register TrueReg,
                     Register FalseReg) const override;
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
   void storeRegToStackSlot(
diff --git a/llvm/lib/Target/XCore/XCoreInstrInfo.cpp b/llvm/lib/Target/XCore/XCoreInstrInfo.cpp
index a15681afa28d..0a86588b6bdb 100644
--- a/llvm/lib/Target/XCore/XCoreInstrInfo.cpp
+++ b/llvm/lib/Target/XCore/XCoreInstrInfo.cpp
@@ -326,8 +326,8 @@ XCoreInstrInfo::removeBranch(MachineBasicBlock &MBB, int *BytesRemoved) const {
 
 void XCoreInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                  MachineBasicBlock::iterator I,
-                                 const DebugLoc &DL, MCRegister DestReg,
-                                 MCRegister SrcReg, bool KillSrc,
+                                 const DebugLoc &DL, Register DestReg,
+                                 Register SrcReg, bool KillSrc,
                                  bool RenamableDest, bool RenamableSrc) const {
   bool GRDest = XCore::GRRegsRegClass.contains(DestReg);
   bool GRSrc  = XCore::GRRegsRegClass.contains(SrcReg);
diff --git a/llvm/lib/Target/XCore/XCoreInstrInfo.h b/llvm/lib/Target/XCore/XCoreInstrInfo.h
index 036321b573e3..5026671616fa 100644
--- a/llvm/lib/Target/XCore/XCoreInstrInfo.h
+++ b/llvm/lib/Target/XCore/XCoreInstrInfo.h
@@ -63,7 +63,7 @@ public:
                         int *BytesRemoved = nullptr) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;
 
diff --git a/llvm/lib/Target/Xtensa/XtensaInstrInfo.cpp b/llvm/lib/Target/Xtensa/XtensaInstrInfo.cpp
index c38c78b54ec2..da2883e1902c 100644
--- a/llvm/lib/Target/Xtensa/XtensaInstrInfo.cpp
+++ b/llvm/lib/Target/Xtensa/XtensaInstrInfo.cpp
@@ -107,8 +107,8 @@ void XtensaInstrInfo::adjustStackPtr(unsigned SP, int64_t Amount,
 
 void XtensaInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                                   MachineBasicBlock::iterator MBBI,
-                                  const DebugLoc &DL, MCRegister DestReg,
-                                  MCRegister SrcReg, bool KillSrc,
+                                  const DebugLoc &DL, Register DestReg,
+                                  Register SrcReg, bool KillSrc,
                                   bool RenamableDest, bool RenamableSrc) const {
   // The MOV instruction is not present in core ISA,
   // so use OR instruction.
diff --git a/llvm/lib/Target/Xtensa/XtensaInstrInfo.h b/llvm/lib/Target/Xtensa/XtensaInstrInfo.h
index 5d1206b91808..9bb211442714 100644
--- a/llvm/lib/Target/Xtensa/XtensaInstrInfo.h
+++ b/llvm/lib/Target/Xtensa/XtensaInstrInfo.h
@@ -50,7 +50,7 @@ public:
                               int &FrameIndex) const override;
 
   void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
-                   const DebugLoc &DL, MCRegister DestReg, MCRegister SrcReg,
+                   const DebugLoc &DL, Register DestReg, Register SrcReg,
                    bool KillSrc, bool RenamableDest = false,
                    bool RenamableSrc = false) const override;