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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/111370] On Aarch64 4% 511.povray_r regression between
 g:6cd85273071b5f13 (2023-08-23 00:17) and g:e1f096a3cc96c719 (2023-08-25
 22:34)
Date: Tue, 12 Sep 2023 12:31:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111370

Tamar Christina <tnfchris at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tnfchris at gcc dot gnu.org
   Last reconfirmed|                            |2023-9-12

--- Comment #1 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Ok, I can reproduce this with the generic cost model on Neoverse N1 hardwar=
e.

The generic cost model is based on a 10+ years old cpu and is no longer fit=
 for
modern CPUs.

We are planning to replace it this GCC release so the regression should go =
away
then.

I've tested with -mcpu=3Dneoverse-n1 and it does go away and gives a much b=
etter
score.=