[Bug rtl-optimization/65401] [5 Regression] make_field_assignment broken for big-endian

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65401

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, not latent, that make_field_assignment stuff has been added in r220249.
So, either we need to disable it altogether for anything but little endian, or
adjust the addresses when adjusting MEMs mode too.