https://files.catbox.moe/fesgvi.pdf
Its absence on the website is collateral damage from the SourceHut outage a couple of weeks ago which I have not gotten around to fixing yet.
Maybe you're interested to know that I'm currently trying to isolate the TCC backend and make it reusable with a binary IR: https://github.com/rochus-keller/TccGen/. I would consider QBE, but unfortunately it doesn't support 32 bit architectures, and the TCC code is time tested (albeit not particularly structured and modular so far).