re PR target/56766 (Fails to combine (vec_select (vec_concat ...)) to (vec_merge...

re PR target/56766 (Fails to combine (vec_select (vec_concat ...)) to (vec_merge ...))

	PR target/56776
	* config/i386/sse.md (*avx_addsubv4df3_1): New insn pattern.
	(*avx_addsubv4df3_1s): Ditto.
	(*sse3_addsubv2df3_1): Ditto.
	(*sse3_addsubv2df3_1s): Ditto.
	(*avx_addsubv8sf3_1): Ditto.
	(*avx_addsubv8sf3_1s): Ditto.
	(*sse3_addsubv4sf3_1): Ditto.
	(*sse3_addsubv4sf3_1s): Ditto.

testsuite/ChangeLog:

	PR target/56776
	* gcc.target/i386/pr56776-1.c: New test.
	* gcc.target/i386/pr56776-2.c: Ditto.

From-SVN: r224527