[Bug target/106524] New: [12/13 Regression] ICE in extract_insn, at recog.cc:2791 (error: unrecognizable insn)

["asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106524

            Bug ID: 106524
           Summary: [12/13 Regression] ICE in extract_insn, at
                    recog.cc:2791 (error: unrecognizable insn)
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

gcc 13.0.0 20220731 snapshot (g:525a1a73a5a563c829a5f76858fe122c9b39f254) ICEs
when compiling the following testcase, reduced from
gcc/testsuite/gcc.target/aarch64/sve/vcond_4_zero.c, w/ -march=armv8-a+sve -O2
-fno-move-loop-invariants:

void
test__zero (int *restrict dest, int *restrict src, float *a, int count)
{
  int i;

  for (i = 0; i < count; ++i)
    dest[i] = !__builtin_isunordered (a[i], 0) ? src[i] : 0;
}

% aarch64-linux-gnu-gcc-13.0.0 -march=armv8-a+sve -O2 -fno-move-loop-invariants
-c ezv9mlin.c
ezv9mlin.c: In function 'test__zero':
ezv9mlin.c:8:1: error: unrecognizable insn:
    8 | }
      | ^
(insn 58 23 59 4 (set (reg:VNx4BI 122)
        (unspec:VNx4BI [
                (reg:VNx4BI 97 [ loop_mask_46 ])
                (const_int 0 [0])
                (reg:VNx4SF 98 [ vect__4.10 ])
                (const_vector:VNx4SF repeat [
                        (const_double:SF 0.0 [0x0.0p+0])
                    ])
            ] UNSPEC_COND_FCMUO)) -1
     (expr_list:REG_DEAD (reg:VNx4SF 98 [ vect__4.10 ])
        (nil)))
during RTL pass: sched1
ezv9mlin.c:8:1: internal compiler error: in extract_insn, at recog.cc:2791
0x75b3e6 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/rtl-error.cc:108
0x75b404 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/rtl-error.cc:116
0x759d4d extract_insn(rtx_insn*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/recog.cc:2791
0xd2ddcf scan_one_insn
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/ira-costs.cc:1464
0xd2ddcf process_bb_for_costs
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/ira-costs.cc:1632
0xd2f4b7 find_costs_and_classes
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/ira-costs.cc:1739
0xd2fafa ira_set_pseudo_classes(bool, _IO_FILE*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/ira-costs.cc:2293
0x1b66137 alloc_global_sched_pressure_data
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/haifa-sched.cc:7201
0x1b66137 sched_init()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/haifa-sched.cc:7356
0x1b678ca haifa_sched_init()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/haifa-sched.cc:7368
0xec7bba schedule_insns()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/sched-rgn.cc:3510
0xec832c schedule_insns()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/sched-rgn.cc:3504
0xec832c rest_of_handle_sched
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/sched-rgn.cc:3722
0xec832c execute
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220731/work/gcc-13-20220731/gcc/sched-rgn.cc:3832