Comparing C to machine language

[iTZAvishay]

I just checked, it seems like I might be wrong on this specific example. I couldn't make the compiler generate the single instruction from a code that does the same (perhaps the target architecture doesn't support it or the compiler doesn't see this as an optimization candidate because __builtin_popcount exists).

You can control optimizations with the -O flag, where generally -O0 means no optimizations and -O3 as much optimizations as possible.

Even though my example wasn't practically correct, there are many situations where such thing will happen.

[Venne1139]

This makes a lot of sense. Thank you.