Update extract_even_odd w/ AVX-512BW insns.

Update extract_even_odd w/ AVX-512BW insns.

gcc/
	* config/i386/i386.c (expand_vec_perm_even_odd_trunc): New.
	(expand_vec_perm_even_odd_1): Handle V64QImode.
	(ix86_expand_vec_perm_const_1): Try expansion with
	expand_vec_perm_even_odd_trunc as well.
	* config/i386/sse.md (VI124_AVX512F): Rename to ...
	(define_mode_iterator VI124_AVX2_24_AVX512F_1_AVX512BW): This. Extend
	to V54QI.
	(define_mode_iterator VI248_AVX2_8_AVX512F): Rename to ...
	(define_mode_iterator VI248_AVX2_8_AVX512F_24_AVX512BW): This. Extend
	to V32HI and V16SI.
	(define_insn "avx512bw_<code>v32hiv32qi2"): Unhide pattern name.
	(define_expand "vec_pack_trunc_<mode>"): Update iterator name.
	(define_expand "vec_unpacks_lo_<mode>"): Ditto.
	(define_expand "vec_unpacks_hi_<mode>"): Ditto.
	(define_expand "vec_unpacku_lo_<mode>"): Ditto.
	(define_expand "vec_unpacku_hi_<mode>"): Ditto.

gcc/testsuite/
	* gcc.target/i386/vect-pack-trunc-1.c: New test.
	* gcc.target/i386/vect-pack-trunc-2.c: Ditto.
	* gcc.target/i386/vect-perm-even-1.c: Ditto.
	* gcc.target/i386/vect-perm-odd-1.c: Ditto.
	* gcc.target/i386/vect-unpack-1.c: Ditto.
	* gcc.target/i386/vect-unpack-2.c: Ditto.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@228394 138bc75d-0d04-0410-961f-82ee72b054a4