[Bug target/70300] New: [6 Regression] ICE: in extract_constrain_insn, at recog.c:2190 (insn does not satisfy its constraints) with -mtune=amdfam10 -mavx512bw

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70300

            Bug ID: 70300
           Summary: [6 Regression] ICE: in extract_constrain_insn, at
                    recog.c:2190 (insn does not satisfy its constraints)
                    with -mtune=amdfam10 -mavx512bw
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
            Target: x86_64-pc-linux-gnu

Created attachment 38027
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38027&action=edit
reduced testcase

Compiler output:
$ gcc -O2 -mtune=amdfam10 -mavx512bw testcase.c 
testcase.c: In function 'foo':
testcase.c:12:1: error: insn does not satisfy its constraints:
 }
 ^
(insn 127 98 128 2 (set (reg:V4SF 53 xmm16)
        (vec_select:V4SF (vec_concat:V8SF (reg:V4SF 53 xmm16)
                (reg:V4SF 53 xmm16))
            (parallel [
                    (const_int 0 [0])
                    (const_int 4 [0x4])
                    (const_int 1 [0x1])
                    (const_int 5 [0x5])
                ]))) testcase.c:8 2460 {vec_interleave_lowv4sf}
     (nil))
testcase.c:12:1: internal compiler error: in extract_constrain_insn, at
recog.c:2190
0xb40708 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /repo/gcc-trunk/gcc/rtl-error.c:108
0xb40774 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /repo/gcc-trunk/gcc/rtl-error.c:119
0xaf6cad extract_constrain_insn(rtx_insn*)
        /repo/gcc-trunk/gcc/recog.c:2190
0xb051ae copyprop_hardreg_forward_1
        /repo/gcc-trunk/gcc/regcprop.c:774
0xb0657a execute
        /repo/gcc-trunk/gcc/regcprop.c:1280
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.


$ gcc -v                                        
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-234340-checking-yes-rtl-df-nobootstrap-nographite/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --disable-bootstrap --without-cloog --without-ppl
--without-isl --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-234340-checking-yes-rtl-df-nobootstrap-nographite
Thread model: posix
gcc version 6.0.0 20160318 (experimental) (GCC)