[Bug d/94496] [D] Use aggressive optimizations in release mode

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94496

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Witold Baryluk from comment #1)
> We are close to making 'in' mean 'scope const', it is already available as a
> preview in dmd 2.092: https://dlang.org/changelog/2.092.0.html#preview-in

Indeed, the new @live attribute should also allow strict aliasing rules to be
turned on for them as well.