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From: "jakub at redhat dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug default/26987] GCC 11 Ada binaries contain unknown tags
Date: Wed, 02 Dec 2020 14:26:25 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26987

--- Comment #11 from Jakub Jelinek <jakub at redhat dot com> ---
(In reply to Tom Tromey from comment #10)
> (In reply to Mark Wielaard from comment #9)
>=20
> > So this is encoded as DW_FORM_block1, which is not a valid form for
> > DW_AT_upper_bound or DW_AT_lower_bound. According the the DWARF spec on=
ly
> > constant, exprloc, reference classes are.
>=20
> My understanding is that this is a small extension to DWARF, because...

If it is DWARF4 only, then it could be considered an extension, but if it
applies to DWARF3 too, then it is certainly invalid.
I don't speak Ada, do you have some minimal testcase?
I've tried to write it in Fortran, but it seems to ignore it alltogether
(probably a bug):
  integer(kind=3D16), parameter :: a =3D 18014398509481984_16
  integer(kind=3D16), parameter :: b =3D a * a
  integer(kind=3D4) :: c (b : b + 32)
  c(b + 2) =3D 1
end

--=20
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