[Bug target/81532] [8 Regression] insn does not satisfy its constraints: extract_constrain_insn, at recog.c:2213

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81532

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-07-24
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
-O2 -mavx512bw -mavx512vl is enough to reproduce.
Cleaned up testcase:

typedef unsigned __int128 V __attribute__ ((vector_size (64)));
V
foo (V c)
{
  c >>= 0 != c;
  return c;
}

The problem is I believe that Yd/Ye constraints use wrong ISA macro.
For !TARGET_64BIT ALL_SSE_REGS is equivalent to SSE_REGS, and for TARGET_64BIT
Yd/Ye is only used in movti_internal.  For the corresponding splitters to work,
I believe we need vpextrq and vpinsrq instructions, both of which are AVX512DQ
rather than AVX512BW - AVX512BW is only for vp{ext,ins}r{b,w}.