https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108177
--- Comment #3 from avieira at gcc dot gnu.org --- The architecture describes it as only writing the true-predicated bytes and leaving the others untouched. I guess reading and writting to the same memory is the best we can do to 'mimic' that in RTL. SVE does the same as x86, so I'll try that approach over unspec_volatile.
