Explain the rationale for basing a family of compilers (several languages, several target machines) on a single IF. Why might a compiler employ more than one IF? Outline some of the major design...

Explain the rationale for basing a family of compilers (several languages, several target machines) on a single IF. Why might a compiler employ more than one IF? Outline some of the major design alternatives for back-end compiler organization and structure. What is sometimes called the “middle end” of a compiler? Why is management of a limited set of physical registers usually deferred until late in the compilation process?