llvm-cbe
resurrected LLVM "C Backend", with improvements
INSTALLATION INSTRUCTIONS
This version of the LLVM-CBE library works with LLVM 6.0 and 7.0. You will have to compile this version of LLVM before you try to use LLVM-CBE. This guide will walk you through the compilation and installation of both tools and show usage statements to verify that the LLVM-CBE library is compiled correctly.
The library is known to compile on various Linux versions (Redhat, Mageia, Ubuntu, Debian), Mac OS X, and Windows (Mingw-w64).
Step 1: Installing LLVM
LLVM-CBE relies on specific LLVM internals, and so it is best to use it with a specific revision of the LLVM development tree. Currently, llvm-cbe works with the LLVM 6.0 and 7.0 release versions and autotools.
Note: to convert C to LLVM IR to run the tests, you will also need a C compiler such as clang.
The first step is to compile LLVM on your machine (this assumes an in-tree build, but out-of-tree will also work):
cd $HOME
git clone https://github.com/llvm-mirror/llvm
cd llvm
git checkout release_37
mkdir build
cd build
../configure
make
Step 2: Compiling LLVM-CBE
Next, download and compile llvm-cbe from the same folder:
cd $HOME/llvm/projects
git clone https://github.com/JuliaComputing/llvm-cbe
cd ../build
make
Step 3: Usage Examples
If llvm-cbe compiles, you should be able to run it with the following commands.
$ cd $HOME/llvm/projects/llvm-cbe/test/selectionsort
$ ls
main.c
$ clang -S -emit-llvm main.c
$ ls
main.c main.ll
$ $(HOME)/llvm/build/Debug+Asserts/bin/llvm-cbe main.ll
Compile Generated C-Code and Run
$ gcc -o main.cbe main.cbe.c
$ ls
main.c main.cbe main.cbe.c main.ll
$ ./main.cbe