LLVM Developer Meeting Tutorial: Building an Out-of-Source Pass

This repository contains the code supporting a tutorial concerning building, testing and using an out-of-source LLVM project.

It assumes you properly installed LLVM 3.8, for instance using::

> git clone http://llvm.org/git/llvm.git --branch release_38 --depth 1 
> cd llvm/tools
> git clone http://llvm.org/git/clang.git --branch release_38 --depth 1
> cd ..
> mkdir _build && cd _build
> cmake .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_INSTALL_UTILS=ON -DCMAKE_INSTALL_PREFIX=$HOME/llvm-3.8
> make
> make install

Which ends up installing llvm in $HOME/llvm-3.8

Then to compile the tutorial code, from the source repository, where this README lies::

> mkdir _build && cd _build
> cmake .. -DLLVM_ROOT=$HOME/llvm-3.8
> make

Content

• The cmake setup is described in CMakeLists.txt ;

• MBA contains the code for a simple transformation ;

• ReachableIntegerValues contains the code for a simple analysis ;

• DuplicateBB contains the code for a slightly more complex transformation that relies on the above analyse ;

• Tests directory contains a basic lit setup ;

• Doc contains the slide sources.

Hopefully, most of the code is documented or self explanatory, enjoy!

NB: The code does not follow the LLVM formating guidelines, so that code samples can be directly included in the LaTeX sources. That's a poor form of literate programing, sorry about this.