[Bug ipa/109983] [12 regression] Wireshark compilation hangs with -O2 -fipa-pta

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109983

--- Comment #18 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:5a381334e2b0faac75c059504155aa4a8f8809ac

commit r12-10005-g5a381334e2b0faac75c059504155aa4a8f8809ac
Author: Richard Biener <rguenther@suse.de>
Date:   Wed May 31 12:07:42 2023 +0200

    ipa/109983 - (IPA) PTA speedup

    This improves the edge avoidance heuristic by re-ordering the
    topological sort of the graph to make sure the component with
    the ESCAPED node is processed first.  This improves the number
    of created edges which directly correlates with the number
    of bitmap_ior_into calls from 141447426 to 239596 and the
    compile-time from 1083s to 3s.  It also improves the compile-time
    for the related PR109143 from 81s to 27s.

    I've modernized the topological sorting API on the way as well.

            PR ipa/109983
            PR tree-optimization/109143
            * tree-ssa-structalias.cc (struct topo_info): Remove.
            (init_topo_info): Likewise.
            (free_topo_info): Likewise.
            (compute_topo_order): Simplify API, put the component
            with ESCAPED last so it's processed first.
            (topo_visit): Adjust.
            (solve_graph): Likewise.

    (cherry picked from commit 95e5c38a98cc64a797b1d766a20f8c0d0c807a74)