AVX-512. Extend gather insn patterns.

AVX-512. Extend gather insn patterns.

gcc/
	* config/i386/sse.md
	(define_expand "<avx512>_gathersi<mode>"): Rename from
	"avx512f_gathersi<mode>".
	(define_insn "*avx512f_gathersi<mode>"): Use VI48F.
	(define_insn "*avx512f_gathersi<mode>_2"): Ditto.
	(define_expand "<avx512>_gatherdi<mode>"): Rename from
	"avx512f_gatherdi<mode>".
	(define_insn "*avx512f_gatherdi<mode>"): Use VI48F.
	(define_insn "*avx512f_gatherdi<mode>_2"): Use VI48F, add 128/256-bit
	wide versions.
	(define_expand "<avx512>_scattersi<mode>"): Rename from
	"avx512f_scattersi<mode>".
	(define_insn "*avx512f_scattersi<mode>"): Use VI48F.
	(define_expand "<avx512>_scatterdi<mode>"): Rename from
	"avx512f_scatterdi<mode>".
	(define_insn "*avx512f_scatterdi<mode>"): Use VI48F.

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: r215201