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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/113295] [14 Regression] SPEC 2006 416.gamess miscompares
 on Aarch64 when built with -Ofast -mcpu=native since
 g:2f46e3578d45ff060a0a329cb39d4f52878f9d5a
Date: Wed, 21 Feb 2024 11:07:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113295

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|needs-bisection             |
            Summary|[14 Regression] SPEC 2006   |[14 Regression] SPEC 2006
                   |416.gamess miscompares on   |416.gamess miscompares on
                   |Aarch64 when built with     |Aarch64 when built with
                   |-Ofast -march=3Dnative -flto  |-Ofast -mcpu=3Dnative si=
nce
                   |                            |g:2f46e3578d45ff060a0a329cb
                   |                            |39d4f52878f9d5a

--- Comment #4 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
most of the changes seem to be scheduling and register renaming, so I guess=
 one
should compile with scheduling off to reduce the noise a bit.

detinp_ does have a weird transformation where a cluster of csel go missing=
 and
replaced with mov, but the function is too big for me to quickly tell if th=
is
is the issue.=