Slide 1 From last time: live variables Set D = 2 Vars Lattice: (D, v, ?, >, t, u ) = (2 Vars, µ, ;,Vars, [, Å ) x := y op z in out F x := y op z (out) = out – { x…

Slide 1 Recap from last time: live variables x := 5 y := x + 2 x := x + 1 y := x + 10... y... Slide 2 Revisiting assignment x := y op z in out F x := y op z (out) = out –…

Slide 1 Direction of analysis Although constraints are not directional, flow functions are All flow functions we have seen so far are in the forward direction In some cases,…

IR Paolo Ferragina Dipartimento di Informatica Università di Pisa Paradigm shift: Web 2.0 is about the many Do big DATA need big PCs ?? an Italian Ad of the ’80 about…

Final Review Chris and Virginia Overview One big multi-part question. (Likely to be on data structures) Many small questions. (Similar to those in midterm 2) A few questions…

Data Structures 2-3 Trees, B Trees, TRIE Trees Data Structures 2-3 Trees, B Trees, TRIE Trees 2-3 Trees J. E. Hopcroft in 1970 improvement on existing height balanced binary…

Index Construction: sorting Paolo Ferragina Dipartimento di Informatica Università di Pisa Reading Chap 4 Indexer steps Dictionary & postings: How do we construct them?…