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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110757] [14 Regression] 7% parest regression on zen3
 -Ofast -march=native -flto between g:4dbb3af1efe55174 (2023-07-14 00:54) and
 g:a5088dc3f5ef73c8 (2023-07-17 03:24)
Date: Wed, 26 Jul 2023 07:15:27 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110757

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Most of the profile based regression is gone between
g:1c6231c05bdccab3 (2023-07-21 03:06)
and=20
g:f33fdf9e7c038639 (2023-07-23 00:17)

This should be:
commit a31ef26b056d0c4f0a9f08b6eb81456ea257298e
Author: Jan Hubicka <jh@suse.cz>
Date:   Fri Jul 21 19:38:26 2023 +0200

    Avoid scaling flat loop profiles of vectorized loops

Which "fixes" the overactive scaling of scale_profile_for_vect_loop
for static profiles.
Still not sure why propagating profile later causes regression - will take a
look.=