AVX-512. Add patterns for compress, expand.

AVX-512. Add patterns for compress, expand.

gcc/
	* config/i386/sse.md
	(define_mode_iterator VI48F): New.
	(define_insn "<avx512>_compress<mode>_mask"): Rename from
	"avx512f_compress<mode>_mask" and update mode iterator.
	(define_insn "<avx512>_compressstore<mode>_mask"): Rename from
	"avx512f_compressstore<mode>_mask" and update mode iterator.
	(define_expand "<avx512>_expand<mode>_maskz"): Rename from
	"avx512f_expand<mode>_maskz" and update mode iterator.
	(define_insn "<avx512>_expand<mode>_mask"): Rename from
	"avx512f_expand<mode>_mask" and update mode iterator.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@215108 138bc75d-0d04-0410-961f-82ee72b054a4