[Bug gcov-profile/105282] [11/12 Regression] V_INDIR overflow causes ICE on -O0 -flto in stream_out_histogram_value, at value-prof.cc:340

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105282

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Sergei Trofimovich <sly...@gcc.gnu.org>:

https://gcc.gnu.org/g:90a29845bfe7d6002e6c2fd49a97820b00fbc4a3

commit r12-8199-g90a29845bfe7d6002e6c2fd49a97820b00fbc4a3
Author: Sergei Trofimovich <siarh...@google.com>
Date:   Fri Apr 15 08:35:27 2022 +0100

    gcov-profile: Allow negative counts of indirect calls [PR105282]

    TOPN metrics are histograms that contain overall count and per-bucket
    count. Overall count can be negative when two profiles merge and some
    of per-bucket metrics are disacarded.

    Noticed as an ICE on python PGO build where gcc crashes as:

        during IPA pass: modref
        a.c:36:1: ICE: in stream_out_histogram_value, at value-prof.cc:340
           36 | }
              | ^
        stream_out_histogram_value(output_block*, histogram_value_t*)
                gcc/value-prof.cc:340

    gcc/ChangeLog:

            PR gcov-profile/105282
            * value-prof.cc (stream_out_histogram_value): Allow negative counts
            on HIST_TYPE_INDIR_CALL.