[Bug target/64386] New: ICE: in extract_insn, at recog.c:2327 (unrecognizable insn) with -mavx512bw

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64386

            Bug ID: 64386
           Summary: ICE: in extract_insn, at recog.c:2327 (unrecognizable
                    insn) with -mavx512bw
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 34321
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34321&action=edit
reduced testcase (from gcc.dg/vect/vect-cond-7.c)

Compiler output:
$ gcc -O -ftree-vectorize -mavx512bw testcase.c 
testcase.c: In function 'fc':
testcase.c:11:1: error: unrecognizable insn:
 }
 ^
(insn 13 12 14 2 (set (reg:DI 98)
        (eq:DI (reg:V64QI 88 [ vect__6.8 ])
            (reg:V64QI 97))) testcase.c:9 -1
     (nil))
testcase.c:11:1: internal compiler error: in extract_insn, at recog.c:2327
0xbd9d78 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /mnt/svn/gcc-trunk/gcc/rtl-error.c:110
0xbd9e08 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/rtl-error.c:118
0xb903b8 extract_insn(rtx_insn*)
        /mnt/svn/gcc-trunk/gcc/recog.c:2327
0x96eecd instantiate_virtual_regs_in_insn
        /mnt/svn/gcc-trunk/gcc/function.c:1582
0x96eecd instantiate_virtual_regs
        /mnt/svn/gcc-trunk/gcc/function.c:1950
0x96eecd execute
        /mnt/svn/gcc-trunk/gcc/function.c:1999
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r219043 - ICE