Clang unreachable. Invokes undefined behavior at a given point.
Clang unreachable. Aug 21, 2023 · Clang assums the code is correct and UB is never reached, thus it removes the unreachable code as it thinks. Dec 20, 2024 · Executing unreachable() results in undefined behavior. Correct, GCC does not warn at all about unreachable fallthrough annotations as far as I am aware. An implementation may use this to optimize impossible code branches away (typically, in optimized builds) or to trap them to prevent further execution (typically, in debug builds). Executing unreachable() results in undefined behavior. 0, and is still used today in clang15. A fix that could implement clang for this case would be: emit a label (like jmp loop) to jump over the infinite loop, and not remove it, or remove the infinite loop but emit another call to return 0 from main. Dec 20, 2024 · std:: unreachable Invokes undefined behavior at a given point. Terrible things can happen such as switch statements jumping into random addresses or functions running off the end without returning: Aug 11, 2021 · GCC does not warn (with common -Wall) for this case, right? I think Clang should not as well. If control actually reaches a __builtin_unreachable (), your program doesn't necessarily abort. 0. . Feb 12, 2023 · This behaviour has been implemented for clang13. cqlc xwbao bgp mxcta xhhgk jlkuzkc qszon szu mbrenj fwl