Global data flow analysis

INTRODUCTION TO GLOBAL DATA FLOW ANALYSIS:


Data-flow analysis is a process in which optimizing compiler collects the data-flow information.


Here,
Data-flow information means status information during computation times like transformations performed in a basic block.


Collection of data-flow information about the program as whole and to distribute this information to each block in the flow graph is much necessary in order to do code optimization and a good job of code generation.
Data-flow information can be collected by setting up and solving systems of equations of the following form :
out [S] = gen [S] U ( in [S] - kill [S] )
Above equation can be read as “ the information at the end of a statement (out [S]) is either generated within the statement (= gen [S]) , or (U) enters at the beginning (in [S]) and is not (-) killed as control flows through the statement (kill [S] )”.

This type of equations are called data-flow equation.

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A list of Video lectures References:
  1. Sebesta,”Concept of programming Language”, Pearson Edu 
  2. Louden, “Programming Languages: Principles & Practices” , Cengage Learning 
  3. Tucker, “Programming Languages: Principles and paradigms “, Tata McGraw –Hill. 
  4. E Horowitz, "Programming Languages", 2nd Edition, Addison Wesley

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    1. Structure of desktop computers
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    1. Andrew S. Tanenbaum, David J. Wetherall, “Computer Networks” Pearson Education.
    2. Douglas E Comer, “Internetworking with TCP/IP Principles, Protocols, And Architecture",Pearson Education
    3. KavehPahlavan, Prashant Krishnamurthy, “Networking Fundamentals”, Wiley Publication.
    4. Ying-Dar Lin, Ren-Hung Hwang, Fred Baker, “Computer Networks: An Open Source Approach”, McGraw Hill.