May 2015
Intermediate to advanced
296 pages
5h 10m
English
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Chapter 7. Optimizing the Machine Code
In this chapter, we will cover the following recipes:
- Eliminating common subexpressions from machine code
- Analyzing live intervals
- Allocating registers
- Inserting the prologue-epilogue code
- Code emission
- Tail call optimization
- Sibling call optimization
Introduction
The machine code generated so far is yet to be assigned real target architecture registers. The registers seen so far have been virtual registers, which are infinite in number. The machine code generated is in the SSA form. However, the target registers are limited in number. Hence, register allocation algorithms require a lot of heuristic calculations to allocate registers in an optimal way.
But, before register allocation, there exists opportunities for ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.