[WebAssembly] Use Register instead of unsigned. NFC

Author: topperc

llvm/lib/Target/WebAssembly/WebAssemblyMachineFunctionInfo.h

@@ -119,20 +119,20 @@ class WebAssemblyFunctionInfo final : public MachineFunctionInfo {
   }
   void setBasePointerVreg(unsigned Reg) { BasePtrVreg = Reg; }
 
-  void stackifyVReg(MachineRegisterInfo &MRI, unsigned VReg) {
+  void stackifyVReg(MachineRegisterInfo &MRI, Register VReg) {
     assert(MRI.getUniqueVRegDef(VReg));
-    auto I = Register(VReg).virtRegIndex();
+    auto I = VReg.virtRegIndex();
     if (I >= VRegStackified.size())
       VRegStackified.resize(I + 1);
     VRegStackified.set(I);
   }
-  void unstackifyVReg(unsigned VReg) {
-    auto I = Register(VReg).virtRegIndex();
+  void unstackifyVReg(Register VReg) {
+    auto I = VReg.virtRegIndex();
     if (I < VRegStackified.size())
       VRegStackified.reset(I);
   }
-  bool isVRegStackified(unsigned VReg) const {
-    auto I = Register(VReg).virtRegIndex();
+  bool isVRegStackified(Register VReg) const {
+    auto I = VReg.virtRegIndex();
     if (I >= VRegStackified.size())
       return false;
     return VRegStackified.test(I);