How is a lattice used by a compiler

Question

In my graduate class on compiler construction we\'ve been introduced to the concept of a lattice. Three lectures have been devoted to lattices and so far it seems like an inter

Answer 1

Lattices are a very useful structure to represent state while doing static analysis on the program being compiled - eg. for removing dead code detected by liveness analysis, available/very busy expressions, reaching definitions, sign analysis and constant propagation.

Here is a very good read if you want the details: Lecture Notes on Static Analysis