December 2015
Beginner to intermediate
166 pages
3h 8m
English
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Chapter 7. Generating Code for Target Architecture
The code generated by the compiler finally has to execute on the target machines. The abstract form of the LLVM IR helps to generate code for various architectures. The target machine can be anything – CPU, GPU, DSP's, and so on. The target machine has some defining aspects such as the register sets, the instruction set, the calling convention of the function, and the instruction pipeline. These aspects or properties are generated using the tablegen tool so that they can be used easily while programming code generation for the machine.
LLVM has a pipeline structure for the backend, where instructions travel through phases—from the LLVM IR to SelectionDAG, then to MachineDAG, then to MachineInstr ...
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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.