[CodeGen] Use MCRegister instead of MCPhysReg in VirtRegMap. NFC

The callers of these methods already use MCRegister.

Author: topperc

llvm/include/llvm/CodeGen/VirtRegMap.h

@@ -94,7 +94,7 @@ class VirtRegMap {
 
   /// creates a mapping for the specified virtual register to
   /// the specified physical register
-  void assignVirt2Phys(Register virtReg, MCPhysReg physReg);
+  void assignVirt2Phys(Register virtReg, MCRegister physReg);
 
   bool isShapeMapEmpty() const { return Virt2ShapeMap.empty(); }
 

llvm/lib/CodeGen/VirtRegMap.cpp

@@ -83,8 +83,8 @@ void VirtRegMap::grow() {
   Virt2SplitMap.resize(NumRegs);
 }
 
-void VirtRegMap::assignVirt2Phys(Register virtReg, MCPhysReg physReg) {
-  assert(virtReg.isVirtual() && Register::isPhysicalRegister(physReg));
+void VirtRegMap::assignVirt2Phys(Register virtReg, MCRegister physReg) {
+  assert(virtReg.isVirtual() && physReg.isPhysical());
   assert(!Virt2PhysMap[virtReg] &&
          "attempt to assign physical register to already mapped "
          "virtual register");
@@ -221,7 +221,7 @@ class VirtRegRewriter : public MachineFunctionPass {
   bool subRegLiveThrough(const MachineInstr &MI, MCRegister SuperPhysReg) const;
   LaneBitmask liveOutUndefPhiLanesForUndefSubregDef(
       const LiveInterval &LI, const MachineBasicBlock &MBB, unsigned SubReg,
-      MCPhysReg PhysReg, const MachineInstr &MI) const;
+      MCRegister PhysReg, const MachineInstr &MI) const;
 
 public:
   static char ID;
@@ -563,7 +563,7 @@ bool VirtRegRewriter::subRegLiveThrough(const MachineInstr &MI,
 /// is assigned to \p LI, which is the main range.
 LaneBitmask VirtRegRewriter::liveOutUndefPhiLanesForUndefSubregDef(
     const LiveInterval &LI, const MachineBasicBlock &MBB, unsigned SubReg,
-    MCPhysReg PhysReg, const MachineInstr &MI) const {
+    MCRegister PhysReg, const MachineInstr &MI) const {
   LaneBitmask UndefMask = ~TRI->getSubRegIndexLaneMask(SubReg);
   LaneBitmask LiveOutUndefLanes;