* config/i386/sse.md (vec_pack_trunc_v2df): Optimize sequence for AVX.

	* config/i386/sse.md (vec_pack_trunc_v2df): Optimize sequence for AVX.
	(vec_pack_sfix_trunc_v2df): Ditto.
	(vec_pack_sfix_v2df): Ditto.
	(vec_pack_sfix_trunc_v4df): Generate fix_truncv4dfv4si2 and
	avx_vec_concatv8si patterns.
	(vec_pack_sfix_v4df): Generate avx_cvtpd2dq256 and
	avx_vec_concatv8si patterns.

testsuite/ChangeLog:

	* gcc.target/i386/avx-floor-sfix-2-vec.c: New test.
	* gcc.target/i386/avx-ceil-sfix-2-vec.c: Ditto.
	* gcc.target/i386/avx-rint-sfix-2-vec.c: Ditto.
	* gcc.target/i386/avx-round-sfix-2-vec.c: Ditto.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181387 138bc75d-0d04-0410-961f-82ee72b054a4