This repository represents a semestral work for a college course. Since during its development I found that LLVM's C API documentation is not very straightforward (basically you find function declarations - but not really how they relate to one another), I decided to make this repository public. In that sense, the most interesting part of the repository is the code generation interface to LLVM.
The code is developed against LLVM 4.0.1, but it should be pretty similar to other versions. At least, it should give you a general idea of the usage of the API.
There is not much reason for doing this in C, unless you have a very specific use case. I thought it'd be fun.
This code parses a small subset of Pascal. Namely, it supports nested blocks, functions, procedures, recursion, indirect recursion, if, while, for structures, and integer data types. Arrays are on the parser but they are not recognized on the code generation part yet.
Since we only use integers (aside from literals), we don't really do much type checking. If you wanted to do it, you may need to add some structures that serve that purpose.
The formal grammar is described in grammar.md. In libs/ you will find the
important part of the code, and if you are interested in the API, just skip to
libs/codegen.c.
Current LLVM-C documentation at llvm.org.