https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96879
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- lowpart_subreg will not handle CONST the way we'd need (it will just wrap the CONST into a SUBREG), but the question is if such imm rtxes can make it through there, because if the offset is non-constant or non-zero, we don't get to this path, it is only for the zero path. If strip_offset_and_salt returns a SYMBOL_REF or LABEL_REF, then aarch64_cannot_force_const_mem should return false for imt_mode != ptr_mode. The question is what other constants can make it through, is that just CONST_INTs etc. (i.e. not CONST)?
