[Bug target/110649] [14 Regression] 25% sphinx3 spec2006 regression on Ice Lake and zen between g:acaa441a98bebc52 (2023-07-06 11:36) and g:55900189ab517906 (2023-07-07 00:23)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110649

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jan Hubicka <hubicka@gcc.gnu.org>:

https://gcc.gnu.org/g:1d203d4c90adb064edfa9680768d1f83a41f17e0

commit r14-2544-g1d203d4c90adb064edfa9680768d1f83a41f17e0
Author: Jan Hubicka <jh@suse.cz>
Date:   Sun Jul 16 23:53:56 2023 +0200

    Avoid double profile udpate in try_peel_loop

    try_peel_loop uses gimple_duplicate_loop_body_to_header_edge which
subtracts the profile
    from the original loop. However then it tries to scale the profile in a
wrong way
    (it forces header count to be entry count).

    This eliminates to profile misupdates in the internal loop of sphinx3.

    gcc/ChangeLog:

            PR middle-end/110649
            * tree-ssa-loop-ivcanon.cc (try_peel_loop): Avoid double profile
update.