In embedded this situation is quite common when x points to a hardware register. The typical solution is to declare x as volatile[1] which tells the compiler to

In embedded this situation is quite common when x points to a hardware register. The typical solution is to declare x as volatile[1] which tells the compiler to omit these optimizations. It's very common for beginner embedded programmers to forget to do this and spend hours debugging why the register doesn't change when it should. [1] https://en.m.wikipedia.org/wiki/Volatile_(computer_programming) https://en.m.wikipedia.org/wiki/Volatile_(computer_programmi...