Virtual & Physical Registers | Code Optimisation - Solved Example | Compiler Design
In this video, you will understand the various topics related to usage of virtual and physical registers. Then how register allocation occurs as a result of this. Broadly the contents are as follows:
1. What is the purpose of virtual registers?
2. Why the number of physical registers is limited in a computer system?
3. What is spill cost and its significance
4. How code optimisation depends on spill cost
5. Necessary tables required to reduce spill cost during register allocation
6. How to perform register allocation while minimising spill cost
Chapters in the video:
0:00 Introduction
0:33 Virtual Registers
1:34 Physical Registers
3:13 Problem statement
3:49 Spill Code
4:57 Necessary Tables
9:31 First Step
10:40 Second Step
13:31 Third Step
16:21 Fourth Step
20:08 Fifth Step
21:18 Conclusion
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