If you really want that, just do a relaxed read into a local variable, increment there and relaxed store afterwards. At least clang will give you exactly the as

If you really want that, just do a relaxed read into a local variable, increment there and relaxed store afterwards. At least clang will give you exactly the assembly you want, minus the technically undefined behavior: https://godbolt.org/g/9ikt1m https://godbolt.org/g/9ikt1m