How hard would it be to create a new backend in D?

[welkam]

On Saturday, 6 August 2022 at 07:39:36 UTC, Walter Bright wrote:
>
> The dmd backend is already in D :-)
>
> But since it's all Boost Licensed, anyone can use 0..100% of it 
> for their own backend project. No asking is required.
>
> Have fun!

But where is inliner located? I read that several other languages 
(Jai, Zig) are trying to make their own x86_64 backends because 
GCC and LLVM are too slow. If DMD backend had its IR well 
documented and inliner implemented not in the frontend I could 
see a future where it could be used by other languages.