/// Prints virtual and physical registers with or without a TRI instance.
///
/// The format is:
-/// %noreg - NoRegister
-/// %reg5 - a virtual register.
-/// %reg5:sub_8bit - a virtual register with sub-register index (with TRI).
-/// %EAX - a physical register
-/// %physreg17 - a physical register when no TRI instance given.
+/// %noreg - NoRegister
+/// %vreg5 - a virtual register.
+/// %vreg5:sub_8bit - a virtual register with sub-register index (with TRI).
+/// %EAX - a physical register
+/// %physreg17 - a physical register when no TRI instance given.
///
/// Usage: OS << PrintReg(Reg, TRI) << '\n';
///