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Message-ID: <CAKwvOdm7GRBWYhPy4Ni2jbsXJp8gDF-AqaAxeLbZ03+LvHxADQ@mail.gmail.com>
Date: Mon, 29 Jul 2019 13:45:35 -0700
From: Nick Desaulniers <ndesaulniers@...gle.com>
To: Nathan Chancellor <natechancellor@...il.com>
Cc: Michael Ellerman <mpe@...erman.id.au>,
Christophe Leroy <christophe.leroy@....fr>,
Segher Boessenkool <segher@...nel.crashing.org>,
Arnd Bergmann <arnd@...db.de>,
kbuild test robot <lkp@...el.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
linuxppc-dev@...ts.ozlabs.org, LKML <linux-kernel@...r.kernel.org>,
clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] powerpc: workaround clang codegen bug in dcbz
On Mon, Jul 29, 2019 at 1:32 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> On Mon, Jul 29, 2019 at 01:25:41PM -0700, Nick Desaulniers wrote:
> > But I'm not sure how the inlined code generated would be affected.
>
> For the record:
>
> https://godbolt.org/z/z57VU7
>
> This seems consistent with what Michael found so I don't think a revert
> is entirely unreasonable.
Thanks for debugging/reporting/testing and the Godbolt link which
clearly shows that the codegen for out of line versions is no
different. The case I can't comment on is what happens when those
`static inline` functions get inlined (maybe the original patch
improves those cases?).
--
Thanks,
~Nick Desaulniers
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