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Subject: [Bug c++/97597] [11 Regression] ICE in build_over_call, at
 cp/call.c:9034
Date: Wed, 23 Dec 2020 22:11:29 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97597

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:612cf351c700b6216209e3f3f4b3a0959bf2dee7

commit r11-6324-g612cf351c700b6216209e3f3f4b3a0959bf2dee7
Author: Jason Merrill <jason@redhat.com>
Date:   Tue Dec 22 15:41:56 2020 -0500

    c++: Fix initializing empty base from prvalue [PR97597]

    unsafe_return_slot_p wasn't recognizing an empty base as
    potentially-overlapping, which it definitely is.

    The change to build_base_path is to make the virtual conversion also
    recognized by is_empty_base_ref; unsafe_return_slot_p doesn't to handle
    virtual conversions, but hypothetical future callers might.

    gcc/cp/ChangeLog:

            PR c++/97597
            * class.c (is_empty_base_ref): New.
            (build_base_path): Add NOP_EXPR after offset.
            * cp-tree.h (is_empty_base_ref): Declare it.
            * call.c (unsafe_return_slot_p): Call it.

    gcc/testsuite/ChangeLog:

            PR c++/97597
            * g++.dg/init/empty3.C: New test.=