> So, I'm not familiar with Ada 'fat pointers' but if that is one - > well, it's a record, with an alignment that the 'new' AAPCS now > ignores, so yes the ABI has changed between gcc 5.1 and 5.2, rather > more significantly for Ada than for C.
Yes, XUP suffixed types are fat pointers and they are maximally aligned so that they can be given non-BLK mode and, consequently, live in registers. > Thoughts? There is no official ABI for Ada so I guess that's not really a problem as long as it's documented on https://gcc.gnu.org/gcc-5/changes.html. -- Eric Botcazou