aarch64: add support for unpacked EOR, ORR and AND

aarch64: add support for unpacked EOR, ORR and AND

Extended patterns for these instructions to support unpacked vectors.
BIC will have to wait, as there is not currently support for unpacked
NOT.

2020-05-29  Joe Ramsay  <joe.ramsay@arm.com>

gcc/
	* config/aarch64/aarch64-sve.md (<LOGICAL:optab><mode>3): Add support
	for unpacked EOR, ORR, AND.

gcc/testsuite/
	* gcc.target/aarch64/sve/load_const_offset_2.c: Force using packed
	vectors.
	* gcc.target/aarch64/sve/logical_unpacked_and_1.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_2.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_3.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_4.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_5.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_6.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_and_7.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_1.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_2.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_3.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_4.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_5.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_6.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_eor_7.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_1.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_2.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_3.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_4.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_5.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_6.c: New test.
	* gcc.target/aarch64/sve/logical_unpacked_orr_7.c: New test.
	* gcc.target/aarch64/sve/scatter_store_6.c: Force using packed vectors.
	* gcc.target/aarch64/sve/scatter_store_7.c: Force using packed vectors.
	* gcc.target/aarch64/sve/strided_load_3.c: Force using packed vectors.
	* gcc.target/aarch64/sve/strided_store_3.c: Force using packed vectors.
	* gcc.target/aarch64/sve/unpack_signed_1.c: Force using packed vectors.