While in isolation that's a good idea, how far should it be taken? Should the compiler emit information on which variables wound up in which registers, and why? What about other of the myriad of compiler optimizations?
Isn't Inlining by far the most important (most practical) optimization among those that actually we can control? A few times i have seen comparisons here to similar languages and in most of them the inlining was the reason (only) for the inferior performance. I agree it would be awesome if the compilers had the ability to chose the best method, but comparisons show sometimes the opposite, i don't know maybe they are hand-picked for some reason.
