Register getRegister(String pdbRegisterName) {
		Register register = pdbRegisterNameToRegisterMap.get(pdbRegisterName);
		if (register != null) {
			return register;
		}
		String registerName = REGISTER_NAME_MAP.get(pdbRegisterName);
		if (registerName == null) {
			registerName = pdbRegisterName;
		}
		register = program.getRegister(registerName);
		pdbRegisterNameToRegisterMap.put(pdbRegisterName, register);
		if (register == null) {
			Msg.info(this, "Program register not found for " + registerName);
		}
		return register;
	}
Maps PDB register name to program {@link Register}.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/pdb/pdbapplicator/PdbRegisterNameToProgramRegisterMapper.java