How does Julia handle speculative execution risks in LLVM optimization?

Julia relies on LLVM for speculative execution optimizations but depends on type stability to avoid invalid speculation.

LLVM performs speculative optimizations like branch prediction and instruction reordering. Julia benefits from this only when type inference guarantees safety. If types are unstable, LLVM must emit conservative code, reducing optimization potential. Thus Julia’s performance model depends heavily on compile-time certainty.