Note that Rust doesn't really generate worse LLVM IR than clang does, given the same input. It's just that as a language, Rust needs MIR optimizations more than

Note that Rust doesn't really generate worse LLVM IR than clang does, given the same input. It's just that as a language, Rust needs MIR optimizations more than C and C++ do, given the increased abstraction (largely necessary for safety).