title: Why cant register variables be made global?
body: <p>While reading from a site a read that you can not make a global variable of type register.Why is it so?
  source:
  <a href="http://publib.boulder.ibm.com/infocenter/lnxpcomp/v8v101/index.jsp?topic=/com.ibm.xlcpp8l.doc/language/ref/regdef.htm" rel="noreferrer">http://publib.boulder.ibm.com/infocenter/lnxpcomp/v8v101/index.jsp?topic=/com.ibm.xlcpp8l.doc/language/ref/regdef.htm</a></p>