[Bug c++/118069] g++ hangs during constraint subsumption

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118069

--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:7eac34a6c793540606a50e20c4c56bd98476d3a1

commit r15-6375-g7eac34a6c793540606a50e20c4c56bd98476d3a1
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Dec 19 12:00:31 2024 -0500

    c++: optimize constraint subsumption [PR118069]

    Since atomic constraints are interned the subsumption machinery can
    safely use pointer instead of structural hashing for them.  This speeds
    up compilation of the testcase in the PR from ~3s to ~2s.

            PR c++/118069

    gcc/cp/ChangeLog:

            * constraint.cc (atom_hasher): Define here, instead of ...
            * cp-tree.h (atom_hasher): ... here.
            * logic.cc (clause::m_set): Use pointer instead of structural
            hashing.

    Reviewed-by: Jason Merrill <jason@redhat.com>