gcc/

	* config/aarch64/aarch64-simd.md (*aarch64_combinez<mode>): Add
	alternatives for reads from memory and moves from general-purpose
	registers.
	(*aarch64_combinez_be<mode>): Likewise.

gcc/testsuite/

	* gcc.target/aarch64/vect_combine_zeroes_1.c: New.

From-SVN: r228374