From: Nick Desaulniers <ndesaulniers@google.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Nathan Chancellor <natechancellor@gmail.com>,
Russell King <linux@armlinux.org.uk>,
Nicolas Pitre <nico@fluxnic.net>, Stefan Agner <stefan@agner.ch>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
clang-built-linux <clang-built-linux@googlegroups.com>
Subject: Re: [PATCH] ARM: xor-neon: Replace __GNUC__ checks with CONFIG_CC_IS_GCC
Date: Fri, 31 May 2019 13:06:13 -0700 [thread overview]
Message-ID: <CAKwvOdkyk3qLMPquSZqXCFauTADJU5X9qJi_fhJqbUuCYBH-6Q@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a1-_KRvoeK4w0b8775izox8fRm=NGJC=yicDRn7J5UW2Q@mail.gmail.com>
On Fri, May 31, 2019 at 12:21 PM Arnd Bergmann <arnd@arndb.de> wrote:
> clang, I would suggest dropping your patch then, and instead adding
I disagree. The minimum version of gcc required to build the kernel
is 4.6, so the comment about older versions of gcc is irrelevant and
should be removed.
Nathan's -Rpass warnings are warning that vectorization was not
calculated to be profitable **for 1 of the 4 functions** by LLVM.
Surely we wouldn't disable NEON opts for XOR because 1 of 4 was not
vectorized?
--
Thanks,
~Nick Desaulniers
WARNING: multiple messages have this Message-ID (diff)
From: Nick Desaulniers <ndesaulniers@google.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Nicolas Pitre <nico@fluxnic.net>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Stefan Agner <stefan@agner.ch>,
Russell King <linux@armlinux.org.uk>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Nathan Chancellor <natechancellor@gmail.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] ARM: xor-neon: Replace __GNUC__ checks with CONFIG_CC_IS_GCC
Date: Fri, 31 May 2019 13:06:13 -0700 [thread overview]
Message-ID: <CAKwvOdkyk3qLMPquSZqXCFauTADJU5X9qJi_fhJqbUuCYBH-6Q@mail.gmail.com> (raw)
In-Reply-To: <CAK8P3a1-_KRvoeK4w0b8775izox8fRm=NGJC=yicDRn7J5UW2Q@mail.gmail.com>
On Fri, May 31, 2019 at 12:21 PM Arnd Bergmann <arnd@arndb.de> wrote:
> clang, I would suggest dropping your patch then, and instead adding
I disagree. The minimum version of gcc required to build the kernel
is 4.6, so the comment about older versions of gcc is irrelevant and
should be removed.
Nathan's -Rpass warnings are warning that vectorization was not
calculated to be profitable **for 1 of the 4 functions** by LLVM.
Surely we wouldn't disable NEON opts for XOR because 1 of 4 was not
vectorized?
--
Thanks,
~Nick Desaulniers
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-05-31 20:06 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 23:57 [PATCH] ARM: xor-neon: Replace __GNUC__ checks with CONFIG_CC_IS_GCC Nathan Chancellor
2019-05-28 23:57 ` Nathan Chancellor
2019-05-30 23:00 ` Nick Desaulniers
2019-05-30 23:00 ` Nick Desaulniers
2019-05-31 8:05 ` Arnd Bergmann
2019-05-31 8:05 ` Arnd Bergmann
2019-05-31 18:32 ` Nathan Chancellor
2019-05-31 18:32 ` Nathan Chancellor
2019-05-31 19:21 ` Arnd Bergmann
2019-05-31 19:21 ` Arnd Bergmann
2019-05-31 20:06 ` Nick Desaulniers [this message]
2019-05-31 20:06 ` Nick Desaulniers
2019-05-31 20:26 ` Nathan Chancellor
2019-05-31 20:26 ` Nathan Chancellor
2019-05-31 21:03 ` Arnd Bergmann
2019-05-31 21:03 ` Arnd Bergmann
2019-06-01 0:28 ` Nathan Chancellor
2019-06-01 0:28 ` Nathan Chancellor
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