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From: "hubicka at ucw dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/98330] [11 Regression] ICE in compute_parm_map, at
 ipa-modref.c:2900 since r9-2640-g3d78e00879b42574
Date: Tue, 19 Jan 2021 13:29:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98330

--- Comment #8 from Jan Hubicka <hubicka at ucw dot cz> ---
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98330
>=20
> --- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
> So modref allocates a fnspec_summary for an unknown indirect call (NULL c=
allee)
> but then in compute_parm_map calls function_or_virtual_thunk_symbol on
> that NULL callee unconditionally.  We have a meaningful fnspec for the
> call because the call type has a 'fn spec' attribute attached.
>=20
> So I'm proposing the following which avoids the ICE (and undefined behavi=
or
> calling a member fn on a NULL object)

That looks OK.  We do not expect fnspecs on types of indirect calls (we
probably should, I just did not expected them to exist) but then we can
always recover them from type.  I suppose we do not need per-call-stmt
sensitive fnspec attributes on indirect calls, right?

Honza=