Yes, LLVM has many bugs that Clang either doesn’t hit or has actively worked around, sometimes for years. There was never a huge push to fix that situation, whi

Yes, LLVM has many bugs that Clang either doesn’t hit or has actively worked around, sometimes for years. There was never a huge push to fix that situation, which made using LLVM for other languages a disappointing experience. Rust has uncovered many of those bugs over time, and it seems like Rust is an important enough customer that those do get fixed now. Slowly. For example, I remember that for many years, Rust would have to throw away part of its aliasing analysis because its annotations were too precise and would confuse LLVM’s optimizer. And so on. But it’s getting better.