Messages in this thread | | | From | Arnd Bergmann <> | Date | Mon, 18 Jan 2021 12:33:29 +0100 | Subject | Re: [PATCH v3 RESEND 1/2] arm: lib: xor-neon: remove unnecessary GCC < 4.6 warning |
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On Mon, Jan 18, 2021 at 12:28 PM Adrian Ratiu <adrian.ratiu@collabora.com> wrote: > On Mon, 18 Jan 2021, Arnd Bergmann <arnd@kernel.org> wrote: > > On Mon, Jan 18, 2021 at 11:56 AM Adrian Ratiu <adrian.ratiu@collabora.com> wrote: > > No, clang does not produce vectorized code by default, not even > with the -ftree-vectorize flag explicitely added like in the next > patch in this series (that flag is enabled by default in clang > anyway, so no effect). > > Clang needs more investigation and testing because with additional > code changes it can be "forced" to output vectorized code, but > that is outside the scope of this series. > > If you think it's a good idea I can add a warning only for Clang > which makes more sense than telling clang users to upgrade their > GCC, since now Clang is officially supported. What do you think?
Yes, either a warning or a Kconfig check seems better to me than just trying to build code that ends up not doing what it is meant to.
Arnd
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