Is there any self-improving compiler around?

Question

I am not aware of any self-improving compiler, but then again I am not much of a compiler-guy.

Is there ANY self-improving compiler out there?

Answer 1

MilepostGCC is a MachineLearning compiler, which improve itself with time in the sense that it is able to change itself in order to become "better" with time. A simpler iterative compilation approach is able to improve pretty much any compiler.