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Subject: [Bug target/102473] [12 Regression] 521.wrf_r 5% slower at -Ofast
 and generic x86_64 tuning after r12-3426-g8f323c712ea76c
Date: Tue, 28 Sep 2021 02:24:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102473

--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Hongtao.liu from comment #13)
> (In reply to H.J. Lu from comment #12)
> > Are glibc regressions real? Please show the affected glibc assembly cod=
es
> > before and after.
>=20
> Assembly codes is the same, but DSB coverage drop down. before my commit=
=20
> front-end bound of libc-2.31.so is 1.2%, after my commit front-end bound
> raise up to 21.9%, use -falign-functions=3D64 doesn't help.
>=20
> The below code is copy from one of libc functions which has big front-end
> bounds
>=20

Which functions in glibc get lower DSB coverage?=