[Bug target/106887] New: ICE in extract_insn, at recog.cc:2791 since r13-2111-g6910cad55ffc330d

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106887

            Bug ID: 106887
           Summary: ICE in extract_insn, at recog.cc:2791 since
                    r13-2111-g6910cad55ffc330d
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: lingling.kong7 at gmail dot com
  Target Milestone: ---

The following crashes:

$ cat bf16.i
typedef __bf16 v16bf __attribute__((__vector_size__(32)));

void
vec_init_dup_v16bf() {
  __bf16 a1;
  (v16bf){a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1, a1};
}

$ gcc bf16.i -c -mf16c
bf16.i: In function ‘vec_init_dup_v16bf’:
bf16.i:7:1: error: unrecognizable insn:
    7 | }
      | ^
(insn 11 10 12 2 (set (reg:V16BF 83)
        (vec_concat:V16BF (reg:V16QI 84)
            (reg:V16QI 84))) "bf16.i":6:10 -1
     (nil))
during RTL pass: vregs
bf16.i:7:1: internal compiler error: in extract_insn, at recog.cc:2791
0x77971c _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/marxin/Programming/gcc/gcc/rtl-error.cc:108
0x77973e _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/marxin/Programming/gcc/gcc/rtl-error.cc:116
0x77794b extract_insn(rtx_insn*)
        /home/marxin/Programming/gcc/gcc/recog.cc:2791
0xbf1315 instantiate_virtual_regs_in_insn
        /home/marxin/Programming/gcc/gcc/function.cc:1611
0xbf1315 instantiate_virtual_regs
        /home/marxin/Programming/gcc/gcc/function.cc:1985
0xbf1315 execute
        /home/marxin/Programming/gcc/gcc/function.cc:2034
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See <https://gcc.gnu.org/bugs/> for instructions.