[PATCH][AARCH64]Define vec_shr as an unspec, use shl for big-endian.

[PATCH][AARCH64]Define vec_shr as an unspec, use shl for big-endian.

gcc/

2015-04-30  Renlin Li  <renlin.li@arm.com>

	* config/aarch64/aarch64-simd.md (vec_shr): Defined as an unspec.
	* config/aarch64/iterators.md (unspec): Add UNSPEC_VEC_SHR.

gcc/testsuite/

2015-04-30  Renlin Li  <renlin.li@arm.com>
	    Alan Lawrence  <alan.lawrence@arm.com>

	* gcc.target/aarch64/vect-reduc-or_1.c: New.

From-SVN: r222635