This repository contains my implementation of a compiler for a subset of C language. The compiler is written in C++, it accepts C files and generates X86-64 assembly output.

• examples/ contains sample example files and corresponding assembly generated by gcc
• src/ contains all compiler source files
• tests/ contains tests in form of a program and expected program output
• LOG.md contains the working log on the project, describing some design decisions and general dev process

Note that x86-64 Linux is the only supported platform for now.

git clone https://github.com/caballeto/mcc
cd mcc/
make
make install

The compiler functionality is mainly finished, at least the part I was aiming at. It supports operators, function calls, register spilling, struct, union, enum, typedef, pointers, pointer arithmetic, arrays, and more.

These are some bugs I intend to fix, once I will have some time for that.

• call inside arguments reassigns %rdi (param) registers
• implement better conditional expression generation
• rewrite register allocation algorithm
• would be good to extend fully integer types (signed/unsigned/long long int, etc.) and be able to use gcc headers

• github.com/DoctorWkt/acwj - a C compiler in C
• https://www.cs.virginia.edu/~evans/cs216/guides/x86.html - x86 tutorial
• Retargetable C compiler - implementation of a small production C compiler (lcc)

Ideas and some parts of the code have been taken from Tommy Warren's github.com/DoctorWkt/acwj.