December 2015
Beginner to intermediate
166 pages
3h 8m
English
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Chapter 5. Advanced IR Block Transformations
In the previous chapter, we have gone through some of the optimizations, which were mainly at instruction level. In this chapter, we will look at optimizations on block level where we will be optimizing a block of code to a simpler form, which makes the code more effective. We will start by looking at how loops are represented in LLVM, use the concept of dominance and CFG to optimize loops. We will use
Loop Simplification (LoopSimplify)and
Loop Invariant Code Motion optimizations for loop processing. We will then see how a scalar value changes during program execution and how the result of this Scalar Evolution Optimization can be used in other optimizations. Then we will look into how LLVM represents ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.