I wrote about some rustc compiler contributions that derive from our low-level systems work https://trifectatech.org/blog/fixing-our-own-problems-in-the-rust-compiler/ Also it's already out of date, because with https://github.com/rust-lang/miri/pull/4912 that got merged earlier today we will soon be able to run our AArch64 SIMD tests with miri. #rustlang