Why are compilers so stupid?

Question

I always wonder why compilers can\'t figure out simple things that are obvious to the human eye. They do lots of simple optimizations, but never something even a little bit

Answer 1

Compilers are as smart as we make them. I don't know too many programmers who would bother writing a compiler that would check for constructs such as the ones you used. Most concentrate on more typical ways to improve performance.

It is possible that someday we will have software, including compilers, that can actually learn and grow. When that day comes most, maybe all, programmers will be out of job.