Finish moving TargetRegisterInfo::isVirtualRegister() and friends to llvm::Register as started by r367614. NFC

llvm-svn: 367633
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 053f10f..1b6326c 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -399,7 +399,7 @@
     } else {
       const TargetRegisterInfo *RI = Asm->MF->getSubtarget().getRegisterInfo();
       MachineLocation Location(RI->getFrameRegister(*Asm->MF));
-      if (RI->isPhysicalRegister(Location.getReg()))
+      if (Register::isPhysicalRegister(Location.getReg()))
         addAddress(*SPDie, dwarf::DW_AT_frame_base, Location);
     }
   }