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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/106833] Handle OPAQUE_TYPE in
 gimple_canonical_types_compatible_p
Date: Tue, 06 Sep 2022 03:40:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106833

--- Comment #8 from Kewen Lin <linkw at gcc dot gnu.org> ---
Created attachment 53542
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53542&action=3Dedit
Specially handle opaque type in verify_type

(In reply to Segher Boessenkool from comment #7)
> (In reply to rguenther@suse.de from comment #6)
> > Ah, that special "mode".  I think verify_types shouldn't do anything
> > for OPAQUE_TYPES or alternatively trust the targets setup of
> > TYPE_MAIN_VARIANT/TYPE_CANONICAL.  Maybe verify TYPE_CANONICAL
> > and TYPE_MAIN_VARIANT are also OPAQUE_TYPE.
>=20
> It's probably easiest to just test if the TYPE_MODEs match, for OPAQUE_TY=
PEs?

Thanks for suggestions from both of you! Following your suggestions, I made=
 a
patch which also considers size and alignment information which is mentione=
d in
the documentation, does it make sense to you?=