[Bug target/111745] New: [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[Bug target/111745] New: [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

            Bug ID: 111745
           Summary: [14 Regression] ICE: in extract_insn, at recog.cc:2791
                    (unrecognizable insn) with -ffloat-store -mavx512fp16
                    -mavx512vl
           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 56083
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56083&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -ffloat-store -mavx512fp16 -mavx512vl testcase.c 
testcase.c: In function 'foo':
testcase.c:8:1: error: unrecognizable insn:
    8 | }
      | ^
(insn 54 53 55 2 (set (reg:V8HF 136)
        (vec_concat:V8HF (mem:V4HF (plus:DI (reg/f:DI 93 virtual-stack-vars)
                    (const_int -16 [0xfffffffffffffff0])) [1  S8 A64])
            (reg:V4HF 139))) "testcase.c":7:5 -1
     (nil))
during RTL pass: vregs
testcase.c:8:1: internal compiler error: in extract_insn, at recog.cc:2791
0x7e765b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /repo/gcc-trunk/gcc/rtl-error.cc:108
0x7e76d8 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /repo/gcc-trunk/gcc/rtl-error.cc:116
0x7d63fd extract_insn(rtx_insn*)
        /repo/gcc-trunk/gcc/recog.cc:2791
0x10e7995 instantiate_virtual_regs_in_insn
        /repo/gcc-trunk/gcc/function.cc:1610
0x10e7995 instantiate_virtual_regs
        /repo/gcc-trunk/gcc/function.cc:1983
0x10e7995 execute
        /repo/gcc-trunk/gcc/function.cc:2030
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.

$ 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-r14-4520-20231009121517-gb0892b1fc63-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-r14-4520-20231009121517-gb0892b1fc63-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231009 (experimental) (GCC)

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |needs-bisection
   Target Milestone|---                         |14.0

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

Hongtao.liu <crazylht at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |crazylht at gmail dot com

--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
Mine, I'll take a look.

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:4efe9085d087a8d94261e4c38dd2ba840f3419ac

commit r14-4549-g4efe9085d087a8d94261e4c38dd2ba840f3419ac
Author: liuhongt <hongtao.liu@intel.com>
Date:   Tue Oct 10 11:32:09 2023 +0800

    Refine predicate of operands[2] in divv4hf3 with register_operand.

    In the expander, it will emit below insn.

    rtx tmp = gen_rtx_VEC_CONCAT (V4SFmode, operands[2],
                            force_reg (V2SFmode, CONST1_RTX (V2SFmode)));

    but *vec_concat<mode> only allow register_operand.

    gcc/ChangeLog:

            PR target/111745
            * config/i386/mmx.md (divv4hf3): Refine predicate of
            operands[2] with register_operand.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr111745.c: New test.

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

--- Comment #3 from Hongtao.liu <crazylht at gmail dot com> ---
Fixed.

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
.

[Bug target/111745] [14 Regression] ICE: in extract_insn, at recog.cc:2791 (unrecognizable insn) with -ffloat-store -mavx512fp16 -mavx512vl

[liuhongt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111745

--- Comment #5 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
*** Bug 111068 has been marked as a duplicate of this bug. ***