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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/114574] [14 regression] ICE when building curl with LTO
 (fld_incomplete_type_of, at ipa-free-lang-data.cc:257) since r14-9763
Date: Fri, 19 Apr 2024 08:35:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114574

--- Comment #33 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #32)
> Ah, but get_alias_set has quite special handling of pointers, it finds the
> ultimately pointed type and uses TYPE_MAIN_VARIANT for it, so it actually
> ignores TYPE_CANONICAL of the pointer type itself for TYPE_ALIAS_SET
> decisions.

Yes because you need to ignore all the qualifiers on the pointed to types.
Otherwise you end up with `const int*const*` and `int**` have not the same
aliasing set.=