[Bug c++/113031] [14 Regression] ICE in cxx_fold_indirect_ref_1 starting with r14-6508

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113031

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Nathaniel Shead <nsh...@gcc.gnu.org>:

https://gcc.gnu.org/g:39f9c426f58448d6df340cdccd84e05721a20921

commit r14-6619-g39f9c426f58448d6df340cdccd84e05721a20921
Author: Nathaniel Shead <nathanielosh...@gmail.com>
Date:   Sat Dec 16 10:59:03 2023 +1100

    c++: Fix unchecked use of CLASSTYPE_AS_BASE [PR113031]

    My previous commit (naively) assumed that a TREE_CODE of RECORD_TYPE or
    UNION_TYPE was sufficient for optype to be considered a "class type".
    However, this does not account for e.g. template type parameters of
    record or union type. This patch corrects to check for CLASS_TYPE_P
    before checking for as-base conversion.

            PR c++/113031

    gcc/cp/ChangeLog:

            * constexpr.cc (cxx_fold_indirect_ref_1): Check for CLASS_TYPE
            before using CLASSTYPE_AS_BASE.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/pr113031.C: New test.

    Signed-off-by: Nathaniel Shead <nathanielosh...@gmail.com>