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From: "acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/112922] [14 Regression] 465.tonto from SPECFP 2006 fails
 train run on Aarch64-linux with -O2 and -flto
Date: Tue, 20 Feb 2024 11:56:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112922

Alex Coplan <acoplan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |acoplan at gcc dot gnu.org,
                   |                            |rsandifo at gcc dot gnu.org

--- Comment #1 from Alex Coplan <acoplan at gcc dot gnu.org> ---
So I did some bisection on this, and indeed it seems to have started with
r14-6290-g9f0f7d802482a8958d6cdc72f1fe0c8549db2182 i.e.

commit 9f0f7d802482a8958d6cdc72f1fe0c8549db2182
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Thu Dec 7 19:41:19 2023

    aarch64: Add an early RA for strided registers

but then it seemed to get fixed shortly afterwards by
r14-6339-g8b5cd6c4519cc120badd2b35a9e30d4deb82c012 i.e.

commit 8b5cd6c4519cc120badd2b35a9e30d4deb82c012
Author: Richard Sandiford <richard.sandiford@arm.com>
Date:   Fri Dec 8 16:27:40 2023

    aarch64: Some tweaks to the early-ra pass

CCing Richard S who can hopefully confirm if that change was expected to fix
correctness / wrong code issues.=