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 <l...@intel.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-...@lists.01.org >
