[Bug target/50883] [ARM] Suboptimal optimization for small structures

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50883

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Earnshaw from comment #9)
> Part of the problem here is that the gimple expansion does not see the
> argument unpacking or understand how the parameters are passed; so this is
> only exposed after lowering to RTL and we are then reliant on the less
> powerful RTL optimations to get good code.

Right, i was thinking about how we expose so of it like having a late pass
which does the splitting if it is possible. This is part of the reason why I
created the meta bug to record all of these issues in one place to make it
easier to start working on a pass like that (maybe for gcc 13 but I have so
much stuff on my plate right now).