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Date:   Sat, 29 Aug 2020 22:58:00 -0400 (EDT)
From:   Nicolas Pitre <nico@...xnic.net>
To:     kernel test robot <lkp@...el.com>
cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: {standard input}:1174: Error: inappropriate arguments for opcode
 'mpydu'

This looks like a buggy compiler to me.


On Sun, 30 Aug 2020, kernel test robot wrote:

> Hi Nicolas,
> 
> FYI, the error/warning still remains.
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   e77aee1326f7691763aa968eee2f57db37840b9d
> commit: 602828c1aade576ac5f3fbd59b4eb014c5fc2414 __div64_const32(): improve the generic C version
> date:   12 months ago
> config: arc-allmodconfig (attached as .config)
> compiler: arceb-elf-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         git checkout 602828c1aade576ac5f3fbd59b4eb014c5fc2414
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    {standard input}: Assembler messages:
> >> {standard input}:1174: Error: inappropriate arguments for opcode 'mpydu'
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
> 

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