[Bug ipa/118318] [15 regression] ICE when building firefox-134.0 with PGO

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118318

--- Comment #21 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Jambor <jamborm@gcc.gnu.org>:

https://gcc.gnu.org/g:7deb498425799aceb7659ea25614175a49533184

commit r15-7891-g7deb498425799aceb7659ea25614175a49533184
Author: Martin Jambor <mjambor@suse.cz>
Date:   Fri Mar 7 17:17:24 2025 +0100

    ipa-cp: Avoid ICE when redistributing nodes among edges to recursive clones
(PR 118318)

    PR 118318 reported an ICE during PGO build of Firefox when IPA-CP, in
    the final stages of update_counts_for_self_gen_clones where it
    attempts to guess how to distribute profile count among clones created
    for recursive edges and the various edges that are created in the
    process.  If one such edge has profile count of kind GUESSED_GLOBAL0,
    the compatibility check in the operator+ will lead to an ICE.  After
    discussing the situation with Honza, we concluded that there is little
    more we can do other than check for this situation before touching the
    edge count, so this is what this patch does.

    gcc/ChangeLog:

    2025-02-28  Martin Jambor  <mjambor@suse.cz>

            PR ipa/118318
            * ipa-cp.cc (adjust_clone_incoming_counts): Add a compatible_p
check.