[PATCH][i386,AVX] Fix PR84783 - backport missing permutexvar to GCC7

[Peryt, Sebastian]

Hi,

This patch adds missing permutexvar intrinsics for backporting to GCC 7 to 
resolve PR84783.

2018-03-22  Sebastian Peryt  <sebastian.pe...@intel.com>

gcc:
PR84783
        * config/i386/avx512vlintrin.h (_mm256_permutexvar_epi64)
        (_mm256_permutexvar_epi32, _mm256_permutex_epi64): New intrinsics.

gcc/testsuite:
PR84783

        * gcc.target/i386/avx512vl-vpermd-1.c (_mm256_permutexvar_epi32):
        Test new intrinsic.
        * gcc.target/i386/avx512vl-vpermq-imm-1.c (_mm256_permutex_epi64):
        Ditto.
        * gcc.target/i386/avx512vl-vpermq-var-1.c (_mm256_permutexvar_epi64):
        Ditto.
        * gcc.target/i386/avx512f-vpermd-2.c: Do not check for AVX512F_LEN.
        * gcc.target/i386/avx512f-vpermq-imm-2.c: Ditto.
        * gcc.target/i386/avx512f-vpermq-var-2.c: Ditto.

Is it ok for merge?

Thanks,
Sebastian

PR84783.patch
Description: PR84783.patch