Hi,
On Tue, Dec 15, 2020 at 11:05:28PM +0800, kernel test robot wrote:
> Hi Willy,
>
> FYI, the error/warning still remains.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> master
> head: 148842c98a24e508aecb929718818fbf4c2a6ff3
> commit: 3744741adab6d9195551ce30e65e726c7a408421 random32: add noise from
> network and scheduling activity
(...)
not sure why I'm assigned this, but the root cause is a compiler bug:
> drivers/mtd/tests/subpagetest.c: In function 'mtd_subpagetest_init':
> >> drivers/mtd/tests/subpagetest.c:426:1: error: could not split insn
> 426 | }
> | ^
> (insn:TI 453 2652 455 (set (reg/v:SI 3 a3 [orig:304 a ] [304])
> (xor:SI (reg:SI 1 a1 [orig:717 net_rand_noise ] [717])
> (const:SI (plus:SI (symbol_ref:SI ("*.LANCHOR0") [flags 0x182])
> (const_int 12 [0xc])))))
> "include/linux/prandom.h":66:4 152 {cskyv2_xorsi3}
> (expr_list:REG_DEAD (reg:SI 1 a1 [orig:717 net_rand_noise ] [717])
> (nil)))
> during RTL pass: final
> drivers/mtd/tests/subpagetest.c:426:1: internal compiler error: in
> final_scan_insn_1, at final.c:3074
^^^^^^^^^^^^^^^^^^^^^^^
> 0x510da0 _fatal_insn(char const*, rtx_def const*, char const*, int, char
> const*)
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/rtl-error.c:108
> 0x503d22 final_scan_insn_1
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:3074
> 0x73f8bf final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:3153
> 0x73fbac final_1
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:2021
> 0x740618 rest_of_handle_final
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:4659
> 0x740618 execute
> /tmp/build-crosstools-xh-9.3.0-2.34/gcc/gcc-9.3.0/gcc/final.c:4737
> Please submit a full bug report,
> with preprocessed source if appropriate.
> Please include the complete backtrace with any bug report.
> See <https://gcc.gnu.org/bugs/> for instructions.
^^^^^^^^^^^^^^^^^^^^^^^^^
That's totally out of my scope. I suspect it might have broken a bisect
operation.
Regards,
Willy
