[Bug target/94711] [8/9/10 Regression] class with empty base passed incorrectly with -std=c++17 on arm

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94711

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, what exactly needs changing on ARM?
>From quick skimming, maybe arm_return_in_memory, very likely
aapcs_vfp_sub_candidate, and maybe arm_needs_doubleword_align.
What about comp_not_to_clear_mask_str_un ?

Note, we'd like to do 10.1-rc1 as early possible and this PR is one of the last
two remaining blockers.