[Bug target/77728] [5/6/7/8 Regression] Miscompilation multiple vector iteration on ARM

["ramana at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728

--- Comment #22 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #20)
> BTW, the wording e.g. i386 backend has is:
>               inform (input_location,
>                       "the ABI of passing structure with complex float"
>                       " member has changed in GCC 4.4");
> In this arm/aarch64 case, the wording can't be as specific, because it isn't
> all arguments of this type, but only some arguments of certain type (at some
> positions; for some types like those that have more aligned static data
> members it is all such positioned arguments, for others, e.g. the templates
> where the alignment used to depend on instantiation vs. non-instantiation
> something earlier, only some), but you should consider using inform rather
> than warning for consistency, and you should mention the GCC version where
> it has changed and maybe also print the type in the diagnostic, so that user
> at least knows what type it is that is problematic (but as it is not
> something as simple as in the i386 case, there should not be a single inform
> per TU, but about each case this is encountered).
> 
> Richard said we should defer RC1 till this is done, do you think you can
> have a patch for both architectures written today, tested over the weekend,
> so that we could do RC1 on Monday or Tuesday at latest?

I'll see what I can do but it's going to be tough to finish that by today.

> Is there an agreement in ARM that what the patch does (for aarch64, and
> similar one for arm) is what the AAPCS says?

 I don't see agreement being reached until next week. Sorry about the delay but
it's just bad timing unfortunately.