[PATCH] Add a new option "-fmerge-bitfields" (patch / doc inside)

[Richard Biener]

On Wed, 17 Feb 2016, Bernd Schmidt wrote:

> 
> 
> On 02/17/2016 02:18 PM, Daniel Gutson wrote:
> > On Wed, Nov 26, 2014 at 5:46 AM, Andrew Pinski <pinskia@gmail.com> wrote:
> 
> > > FYI. This causes gfc_add_interface_mapping in fortrant/trans-expr.c to
> > > be miscompiled for aarch64-linux-gnu.  I am still debugging it and
> > > trying to get a smaller testcase.
> > 
> > Hello,
> > 
> >     is there any update on this?
> 
> Is this a PR somewhere?

I think there are several.  But rather than a special pass I hope
we can get to lowering all bitfield accesses somewhere and make
our regular passes deal with the combining.  I've had multiple
approaches at this but never went through finalizing them
(tried doing that too early all the times I guess).

Richard.