If you put this in your app directly, Apple can just find it and reject it at submission time. If JIT were an option, that wouldn't be enough, because the app could do it at runtime. Since it isn't, there is no way to "hide" something like this from the App Store static analyzer.
Hrm. It seems like inline ASM allows for passing the register name dynamically, though I can't tell for sure. If that's the case, it seems like it would be hard to tell ahead of time, other than "app calls msr/mrs".
