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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/102943] [12 Regression] Jump threader
 compile-time hog with 521.wrf_r
Date: Sun, 07 Nov 2021 18:16:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102943

--- Comment #26 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #25)
> LNT sees new regresion on WRF build times (around 6%) at Nov 3
>=20
> https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D287.548.8
> https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D289.270.8
>=20
> The revision range is=20
> g:2d01bef2f214bb80dca0e91c14e95cf4d76b0afb..
> cd389e5f9447d21084abff5d4b7db6cf1da74e57 which contains switch of vrp2 to
> ranger, so I guess it is the likely reason.

This PR is still open, at least for slowdown in the threader with LTO.  The
issue is ranger wide, so it may also cause slowdowns  on non-LTO builds for
WRF, though I haven't checked.=