LLVM Tutorial

General Information

This LLVM tutorial is to help you get familiar with LLVM. :)
It consists of 8 practices and 1 toy project in total.

• List of Practices

  • Basic
    • (1) First Compilation
    • (2) Control Flow Graph
  • Optimization
    • Analysis
      • (3) Function Name Printer
      • (4) Instruction Counter
      • (5) Call Instruction Counter
      • (6) Loop Info
    • Transformation
      • (7) Insert inc Function
      • (8) Dynamic Call Counter

• List of Toy Projects

  • Optimization
    • MemoryProfiler

Prerequisite

LLVM Installation

For your convenience, I wrote a Makefile that automatically downloads and builds LLVM 10.0.0.
It can take more than 3 hours to build LLVM, please start early!

Instructions

Testing

Compile your pass

In each practice folder, type

$ make

You will get the library file that contains your pass.

Apply your pass to a test program

In each practice folder, type

$ make test

You will get the optimized IR code (test.opt.ll) for the test program.

Run the optimized program

In each practice folder, type

$ make run

You will get the output of the optimized program.

Contact

If you need a solution for the practices, please contact me.
Seonyeong Heo, heosy@postech.ac.kr