LTO apparently does not support _FloatNx types

[Paul Iannetta]

On Fri, Jan 13, 2023 at 08:15:34AM +0100, Richard Biener wrote:
> On Thu, Jan 12, 2023 at 5:35 PM Richard Biener
> <richard.guenther@gmail.com> wrote:
> >
> >
> >
> > > Am 12.01.2023 um 17:18 schrieb Paul Iannetta via Gcc <gcc@gcc.gnu.org>:
> > >
> > > Hi,
> > >
> > > I was investigating an ICE (in our yet to be upstreamed back-end which
> > > has native support for float16), on "gcc.dg/torture/float16-complex.c"
> > > when compiled with lto:
> > >
> > > ./gcc/build/gcc/xgcc -B./gcc/build/gcc/ ./gcc/gcc/testsuite/gcc.dg/torture/float16-complex.c \
> > > -O2 -flto -fno-use-linker-plugin -flto-partition=none -lm -o ./float16-complex.exe
> > >
> > > I narrowed it down to the fact that lto-lang does not support _FloatNx
> > > types, the function "lto_type_for_mode" (in gcc/lto/lto-lang.c) and
> > > "c_common_type_for_mode" (in gcc/c-family/c-common.c) are exactly the
> > > same except that "lto_type_for_mode" does not support _FloatNx.
> > >
> > > Is this intentional or an oversight?
> >
> > It’s probably an oversight.
> 
> I'm testing a patch to sync them up.
> 
> Richard.
> 

Wonderful, thanks!

Paul

> >
> > > Cheers,
> > > Paul
> > >
> > >
> > >
> > >
> 
> 
> 
>