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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/93369] [10 regression] g++.dg/lto/pr64076 fails
Date: Sat, 04 Apr 2020 10:11:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93369

--- Comment #17 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Note that to fully fix the problem we need to resolve the way aliases works.
In this case ODR violation makes one COMDAT section to contain only ctor, w=
hile
other contains ctor and its thunk.  The first COMDAT wins which makes the t=
hunk
to call alias of a symbol prevailed by different COMDAT.
This still work w/o LTO and to immitate what happens in linker correctly
we need ability to load both constructors

https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542733.html

For invalid code like this that does not matter much, but the patch has als=
o a
valid testcase.

I can also however patch around and silence the verifier ICE, but it would =
be
just symptomatic workaround=