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

llvm-svn: 367633
diff --git a/llvm/lib/Target/Hexagon/RDFLiveness.cpp b/llvm/lib/Target/Hexagon/RDFLiveness.cpp
index 9cd304a..ed8f08f 100644
--- a/llvm/lib/Target/Hexagon/RDFLiveness.cpp
+++ b/llvm/lib/Target/Hexagon/RDFLiveness.cpp
@@ -890,7 +890,7 @@
       if (!Op.isReg() || !Op.isDef() || Op.isImplicit())
         continue;
       unsigned R = Op.getReg();
-      if (!TargetRegisterInfo::isPhysicalRegister(R))
+      if (!Register::isPhysicalRegister(R))
         continue;
       for (MCSubRegIterator SR(R, &TRI, true); SR.isValid(); ++SR)
         Live.reset(*SR);
@@ -899,7 +899,7 @@
       if (!Op.isReg() || !Op.isUse() || Op.isUndef())
         continue;
       unsigned R = Op.getReg();
-      if (!TargetRegisterInfo::isPhysicalRegister(R))
+      if (!Register::isPhysicalRegister(R))
         continue;
       bool IsLive = false;
       for (MCRegAliasIterator AR(R, &TRI, true); AR.isValid(); ++AR) {