[Bug target/111231] [13/14/15/16 regression] armhf: Miscompilation with -O2/-fno-exceptions level (-fno-tree-vectorize is working)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111231

--- Comment #43 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Mathieu Malaterre from comment #42)
> (In reply to Andrew Pinski from comment #41)
> > (In reply to Richard Earnshaw from comment #34)
> > > To be honest, I'm more concerned that we aren't eliminating a lot of these
> > > copies during the gimple optimization phase.  The memcpy is really a type
> > > punning step (that's strictly ISO C compliant, rather than using the GCC
> > > union extension), so ideally we'd recognize that and eliminate as many of
> > > the copies as possible (perhaps using some form of view_convert or whatever
> > > gimple is appropriate for changing the view without changing the contents).
> > > 
> > > But that's for another day...
> > 
> > After r16-3887-g597b50abb0d2fc1f123a99e1b4beb89ad6259d9e, this issue might
> > not show up any more due to the removal of the extra copies has been
> > improved (there is still more to fixed there though).
> 
> I still see on gcc-15 today:

Did you read? I was referencing a patch to the trunk so it would be included in
GCC 16.