May 2015
Intermediate to advanced
296 pages
5h 10m
English
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Chapter 6. Target-independent Code Generator
In this chapter, we will cover the following recipes:
- The life of an LLVM IR instruction
- Visualizing the LLVM IR CFG using GraphViz
- Describing the target using TableGen
- Defining an instruction set
- Adding a machine code descriptor
- Implementing the MachineInstrBuilder class
- Implementing the MachineBasicBlock class
- Implementing the MachineFunction class
- Writing an instruction selector
- Legalizing SelectionDAG
- Optimizing SelectionDAG
- Selecting instructions from the DAG
- Scheduling instructions in SelectionDAG
Introduction
After optimizing the LLVM IR, it needs to be converted into machine instructions for execution. The machine-independent code generator interface gives an abstract layer that helps convert IR into machine ...
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