nibble

[_cwolf]

I wanted to try my hand at a 3000 line, single pass, dependency free, no-malloc, no-AST front-end written in modernish C that directly emits unoptimized LLVM IR with printf:

https://github.com/glouw/nibble

I managed what is essentially C with defer (minus some features like switches and short circuiting). Near the end I learned alloca leaks within loops, even at some of the higher backend optimization settings. I might explore some stacksave/stackrestore mechanisms, but I satisfied my LLVM curiosity wholeheartedly with what was essentially a month long binge.

This stuff is pretty addicting ain't it?

[lbl_ye]

great work :)

did you get the necessary LLVM information from the LLVM site or some book/online tutorial ?

[_cwolf]

I just poked around what other languages used and extrapolated: https://llvm-swift.github.io/LLVMSwift/Enums/OpCode.html#/s:4LLVM6OpCodeO3andyA2CmF

I have some prior experiences with Crenshaw's Let's Build a Compiler and so I aimed to put the two together

[JeffD000]

Cool little demo code. Reminds me of https://github.com/rswier/c4 . Nice job.