> From: Jonathan Wakely
> Date: Thu, 1 Feb 2024 19:24:49 +
> I think I'd prefer to keep the reserved bits together, but a simpler
> way to avoid 'unsigned long' making a difference for
> PCC_BITFIELD_TYPE_MATTERS targets would be to use no more than 16 bits
> but do:
>
>unsigned
On Thu, 1 Feb 2024 at 17:22, Jonathan Wakely wrote:
>
> On Thu, 1 Feb 2024 at 16:34, Andreas Schwab wrote:
> >
> > On Feb 01 2024, Jonathan Wakely wrote:
> >
> > > This will result in an ABI change for targets that use 1-byte alignment
> > > for all integral types, e.g. cris-elf.
> >
> > Or
On Thu, 1 Feb 2024, 17:23 Jonathan Wakely, wrote:
> On Thu, 1 Feb 2024 at 16:34, Andreas Schwab wrote:
> >
> > On Feb 01 2024, Jonathan Wakely wrote:
> >
> > > This will result in an ABI change for targets that use 1-byte alignment
> > > for all integral types, e.g. cris-elf.
> >
> > Or 2-byte
On Thu, 1 Feb 2024 at 16:34, Andreas Schwab wrote:
>
> On Feb 01 2024, Jonathan Wakely wrote:
>
> > This will result in an ABI change for targets that use 1-byte alignment
> > for all integral types, e.g. cris-elf.
>
> Or 2-byte alignment as on m68k.
Ah yes.
In fact it's a change for everybody,
On Thu, 1 Feb 2024 at 17:08, Hans-Peter Nilsson wrote:
>
> > From: Hans-Peter Nilsson
> > Date: Thu, 1 Feb 2024 17:16:47 +0100
>
> > Not speaking for other platforms with default-packed layout
> > or where ABI structure layout alignment implies a change due
> > to PCC_BITFIELD_TYPE_MATTERS and
> From: Hans-Peter Nilsson
> Date: Thu, 1 Feb 2024 17:16:47 +0100
> Not speaking for other platforms with default-packed layout
> or where ABI structure layout alignment implies a change due
> to PCC_BITFIELD_TYPE_MATTERS and the "unsigned long"
> bitfield type.
>
> That last one may matter
On Feb 01 2024, Jonathan Wakely wrote:
> This will result in an ABI change for targets that use 1-byte alignment
> for all integral types, e.g. cris-elf.
Or 2-byte alignment as on m68k.
--
Andreas Schwab, SUSE Labs, sch...@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3
> From: Jonathan Wakely
> Cc: Hans-Peter Nilsson
> Date: Thu, 1 Feb 2024 15:36:50 +
> I plan to push this to trunk soon.
>
> CC HP for visibility of the change affecting cris-elf. In practice it
> shouldn't make any difference to any sensible code. It only affects
> C++20 mode (and
I plan to push this to trunk soon.
CC HP for visibility of the change affecting cris-elf. In practice it
shouldn't make any difference to any sensible code. It only affects
C++20 mode (and later), and only changes the size of std::formatter
objects which are typically only created by the library
