[Bug tree-optimization/105587] New: [13 Regression] ICE in extract_insn, at recog.cc:2791 (error: unrecognizable insn)

["vsevolod.livinskiy at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105587

            Bug ID: 105587
           Summary: [13 Regression] ICE in extract_insn, at recog.cc:2791
                    (error: unrecognizable insn)
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vsevolod.livinskiy at gmail dot com
  Target Milestone: ---

Link to the Compiler Explorer: https://godbolt.org/z/bboxEaWWx

Reproducer:
extern short arr_108[][4][2][24][12], arr_110[][4][2][24][12];
void test() {
  for (unsigned a = 0; a < 2; a += 2)
    for (unsigned b = 4; b < 22; b++)
      for (int c = 1; c < 11; c++)
        arr_110[0][0][a][b][c] = (unsigned char)arr_108[0][0][a][b][c];
}

Error:
>$ g++ -O3 -c func.cpp   
func.cpp: In function 'void test()':
func.cpp:7:1: error: unrecognizable insn:
    7 | }
      | ^
(insn 18 17 19 2 (set (reg:V1TI 202)
        (ashift:V1TI (subreg:V1TI (reg:V8HI 117 [ vect__15.12 ]) 0)
            (const_int 4294967264 [0xffffffe0]))) "func.cpp":6:70 -1
     (nil))
during RTL pass: vregs
func.cpp:7:1: internal compiler error: in extract_insn, at recog.cc:2791
0x85ea0e _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /testing/gcc/gcc_src_master/gcc/rtl-error.cc:108
0x85ea30 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /testing/gcc/gcc_src_master/gcc/rtl-error.cc:116
0x85cf23 extract_insn(rtx_insn*)
        /testing/gcc/gcc_src_master/gcc/recog.cc:2791
0xecdac5 instantiate_virtual_regs_in_insn
        /testing/gcc/gcc_src_master/gcc/function.cc:1611
0xecdac5 instantiate_virtual_regs
        /testing/gcc/gcc_src_master/gcc/function.cc:1985
0xecdac5 execute
        /testing/gcc/gcc_src_master/gcc/function.cc:2034
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.

gcc version 13.0.0 20220512 (7f78783dbedca0183d193e475262ca3c489fd365)