December 2015
Beginner to intermediate
166 pages
3h 8m
English
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Code Emission
We started from LLVM IR in the first section and converted it to SelectioDAG and then to MachineInstr. Now, we need to emit this code. Currently, we have LLVM JIT and MC to do so. LLVM JIT is the traditional way of generating the object code for a target on the go directly in the memory. What we are more interested in is the LLVM MC layer.
The MC layer is responsible for generation of assembly file/object file from the MachineInstr passed on to it from the previous step. In the MC Layer, the instructions are represented as MCInst, which are lightweight, as in they don't carry much information about the program as MachineInstr.
The code emission starts with the AsmPrinter class, which is overloaded by the target specific AsmPrinter ...
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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.