[Bug target/66473] New: ICE: in extract_insn, at recog.c:2343 (unrecognizable insn) with -mavx512f

["andrew.n.senkevich at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66473

            Bug ID: 66473
           Summary: ICE: in extract_insn, at recog.c:2343 (unrecognizable
                    insn) with -mavx512f
           Product: gcc
           Version: 5.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: andrew.n.senkevich at gmail dot com
  Target Milestone: ---

-bash-4.2$ cat ./test_vlen8.c
#include <immintrin.h>

extern __m512d _ZGVeN8v_func (__m512d);

double func_vlen8 (double x) {
    __m512d mx;
    mx[0] = mx[1] = mx[2] = mx[3] = mx[4] = mx[5] = mx[6] = mx[7] = x;
    __m512d mr = _ZGVeN8v_func (mx);

    return ((double) mr[0]);
}

gcc-5.1.0_install/bin/gcc -c ./test_vlen8.c -mavx512f -O2
./test_vlen8.c: In function âfunc_vlen8â:
./test_vlen8.c:11:1: error: unrecognizable insn:
 }
 ^
(insn 7 6 8 2 (set (reg:QI 94)
        (const_int 128 [0x80])) ./test_vlen8.c:7 -1
     (nil))
./test_vlen8.c:11:1: internal compiler error: in extract_insn, at recog.c:2343
0x965018 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../gcc-5.1.0_src/gcc/rtl-error.c:110
0x965049 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        ../../gcc-5.1.0_src/gcc/rtl-error.c:118
0x935129 extract_insn(rtx_insn*)
        ../../gcc-5.1.0_src/gcc/recog.c:2343
0x7a1c43 instantiate_virtual_regs_in_insn
        ../../gcc-5.1.0_src/gcc/function.c:1598
0x7a1c43 instantiate_virtual_regs
        ../../gcc-5.1.0_src/gcc/function.c:1966
0x7a1c43 execute
        ../../gcc-5.1.0_src/gcc/function.c:2015