Exploit UB to do optims can degenerate to the invocation of nasal deamons. I'm not sure to what extent it would theoritically be possible to avoid daemons while

Exploit UB to do optims can degenerate to the invocation of nasal deamons. I'm not sure to what extent it would theoritically be possible to avoid daemons while still providing some optimization, nor if any people even studied that question, but pragmatically: - complete violation and exploitation of the VM is a situation that Rust is trying to address as a main goal; - the main implementation using LLVM would make it hard to avoid unbounded consequences given the internal handling of UBs by llvm are rarely exploited with such constraints in mind.