[Bug analyzer/96723] [11 Regression] ICE: SIGSEGV: infinite recursion in ana::region::get_subregions_for_binding with -Og -fanalyzer

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96723

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

https://gcc.gnu.org/g:00cb0f5840795698557731c6e549a5ce99573223

commit r11-2789-g00cb0f5840795698557731c6e549a5ce99573223
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Thu Aug 20 10:00:49 2020 -0400

    analyzer: fix infinite recursion ICE on unions [PR96723]

    Attempts to store sm-state into a union in C++ triggered an infinite
    recursion when trying to generate a representative tree, due to
    erroneously trying to use the dtor of the union as a field.

    Fix it by filtering out non-FIELD_DECLs when walking TYPE_FIELDs
    in region::get_subregions_for_binding.

    gcc/analyzer/ChangeLog:
            PR analyzer/96723
            * region-model-manager.cc
            (region_model_manager::get_field_region): Assert that field is a
            FIELD_DECL.
            * region.cc (region::get_subregions_for_binding): In
            union-handling, filter the TYPE_FIELDS traversal to just
FIELD_DECLs.

    gcc/testsuite/ChangeLog:
            PR analyzer/96723
            * g++.dg/analyzer/pr96723.C: New test.