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From: "iains at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/104117] [9,10,11,12 Regression] Darwin ppc64 uses
 invalid non-PIC address to access constants (in PIC code).
Date: Sun, 13 Feb 2022 19:37:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104117

--- Comment #24 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Sergey Fedorov from comment #22)
> (In reply to Iain Sandoe from comment #20)
> > On testing, this is not sufficient - one ends up with ICEs when we reje=
ct a
> > valid (UNSPEC-wrapped) address here.  So I think that the slightly more
> > elaborate target changes are required - but the LRA change seems fine!
> > ... reg-straps on this old h/w take > 1 day .. so some more time will be
> > needed for a complete answer.
>=20
> Once you decide the patch is ready for testing, please let me know, I will
> test it on my end too (for icu and R both).

The patch applied to master will be backported (when I have some time!) .. =
but
it should apply reasonably easily to 11.2 / 10.3 if you are keen to try it =
out.=