AVX-512. Add vperm[it]2 insns support.

AVX-512. Add vperm[it]2 insns support.

gcc/
	* config/i386/sse.md
	(define_expand "<avx512>_vpermi2var<VI48F:mode>3_maskz"): Rename from
	"avx512f_vpermi2var<mode>3_maskz" and update mode iterator.
	(define_expand "<avx512>_vpermi2var<VI2_AVX512VL:mode>3_maskz"):
	New.
	(define_insn "<avx512>_vpermi2var<VI48F:mode>3<sd_maskz_name>"): Rename
	from "avx512f_vpermi2var<mode>3<sd_maskz_name>" and update mode
	iterator.
	(define_insn "<avx512>_vpermi2var<VI2_AVX512VL:mode>3<sd_maskz_name>"):
	New.
	(define_insn "<avx512>_vpermi2var<VI48F:mode>3_mask"): Rename from
	"avx512f_vpermi2var<mode>3_mask" and update mode iterator.
	(define_insn "<avx512>_vpermi2var<VI2_AVX512VL:mode>3_mask"): New.
	(define_expand "<avx512>_vpermt2var<VI48F:mode>3_maskz"): Rename from
	"avx512f_vpermt2var<mode>3_maskz" and update mode iterator.
	(define_expand "<avx512>_vpermt2var<VI2_AVX512VL:mode>3_maskz"): New.
	(define_insn "<avx512>_vpermt2var<VI48F:mode>3<sd_maskz_name>"): Rename
	from "avx512f_vpermt2var<mode>3<sd_maskz_name>" and update mode
	iterator.
	(define_insn "<avx512>_vpermt2var<VI2_AVX512VL:mode>3<sd_maskz_name>"):
	New.
	(define_insn "<avx512>_vpermt2var<VI48F:mode>3_mask"): Rename from
	"avx512f_vpermt2var<mode>3_mask" and update mode iterator.
	(define_insn "<avx512>_vpermt2var<VI2_AVX512VL:mode>3_mask"): New.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
From-SVN: r215151