This person wrote memory safe C/C++ compiler
It uses llvm and can currently compile memory safe Lua, python, openssh, musl, curl, and some others
https://github.com/pizlonator/llvm-project-deluge/blob/deluge/Manifesto.md
Someone commented that if we can get a gentoo system built using musl and this compiler frontend it would be, possibly, the greatest OS that ever or will ever be conceived.