[Bug target/111062] New: ICE: in final_scan_insn_1, at final.cc:2808 could not split insn {*andndi_1} with -O -mavx10.1-256 -mavx512bw -mno-avx512f

[Bug target/111062] New: ICE: in final_scan_insn_1, at final.cc:2808 could not split insn {*andndi_1} with -O -mavx10.1-256 -mavx512bw -mno-avx512f

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111062

            Bug ID: 111062
           Summary: ICE: in final_scan_insn_1, at final.cc:2808 could not
                    split insn {*andndi_1} with -O -mavx10.1-256
                    -mavx512bw -mno-avx512f
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 55755
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55755&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -mavx10.1-256 -mavx512bw -mno-avx512f testcase.c
cc1: warning:
'-mno-avx512{f,vl,bw,dq,cd,bf16,fp16,vbmi,vbmi2,vnni,ifma,bitalg,vpopcntdq}'
are ignored with '-mavx10.1' and above
testcase.c: In function 'foo':
testcase.c:7:1: warning: AVX512F vector return without AVX512F enabled changes
the ABI [-Wpsabi]
    7 | {
      | ^
testcase.c:10:1: error: could not split insn
   10 | }
      | ^
(insn 24 111 25 2 (parallel [
            (set (reg:DI 69 k1 [156])
                (and:DI (not:DI (reg:DI 70 k2 [226]))
                    (reg:DI 68 k0 [157])))
            (clobber (reg:CC 17 flags))
        ]) "testcase.c":9:12 624 {*andndi_1}
     (expr_list:REG_DEAD (reg:DI 70 k2 [226])
        (expr_list:REG_UNUSED (reg:CC 17 flags)
            (nil))))
during RTL pass: final
testcase.c:10:1: internal compiler error: in final_scan_insn_1, at
final.cc:2808
0x7e6460 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /repo/gcc-trunk/gcc/rtl-error.cc:108
0x74d1ee final_scan_insn_1
        /repo/gcc-trunk/gcc/final.cc:2808
0x108b06b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
        /repo/gcc-trunk/gcc/final.cc:2887
0x108b2a4 final_1
        /repo/gcc-trunk/gcc/final.cc:1979
0x108bef8 rest_of_handle_final
        /repo/gcc-trunk/gcc/final.cc:4240
0x108bef8 execute
        /repo/gcc-trunk/gcc/final.cc:4318
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.


-mno-avx512f needs to be passed, even though the compiler indicates it's
ignored


$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-3320-20230818093638-g7f8d730a563-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-3320-20230818093638-g7f8d730a563-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20230818 (experimental) (GCC)

[Bug target/111062] ICE: in final_scan_insn_1, at final.cc:2808 could not split insn {*andndi_1} with -O -mavx10.1-256 -mavx512bw -mno-avx512f

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111062

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Zdenek Sojka from comment #0)
> Created attachment 55755 [details]
> reduced testcase
> 
> Compiler output:
> $ x86_64-pc-linux-gnu-gcc -O -mavx10.1-256 -mavx512bw -mno-avx512f testcase.c
> cc1: warning:
> '-mno-avx512{f,vl,bw,dq,cd,bf16,fp16,vbmi,vbmi2,vnni,ifma,bitalg,vpopcntdq}'
> are ignored with '-mavx10.1' and above
Warning message can be a little confusing.
A better formulation might be: with avx10.1 enabled, -mno-avx512f does not
fully disable AVX512-related instructions.

[Bug target/111062] ICE: in final_scan_insn_1, at final.cc:2808 could not split insn {*andndi_1} with -O -mavx10.1-256 -mavx512bw -mno-avx512f

[liuhongt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111062

liuhongt at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |liuhongt at gcc dot gnu.org
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #2 from liuhongt at gcc dot gnu.org ---
Fixed in GCC14.