gcc/
	* config/arm/neon.md (vec_shr_<mode>, vec_shl_<mode>): Disable in
	big-endian mode.
	(reduc_splus_<mode>, reduc_uplus_<mode>, reduc_smin_<mode>)
	(reduc_smax_<mode>, reduc_umin_<mode>, reduc_umax_<mode>)
	(neon_vec_unpack<US>_lo_<mode>, neon_vec_unpack<US>_hi_<mode>)
	(vec_unpack<US>_hi_<mode>, vec_unpack<US>_lo_<mode>)
	(neon_vec_<US>mult_lo_<mode>, vec_widen_<US>mult_lo_<mode>)
	(neon_vec_<US>mult_hi_<mode>, vec_widen_<US>mult_hi_<mode>)
	(vec_pack_trunc_<mode>, neon_vec_pack_trunc_<mode>): Disable for Q
	registers in big-endian mode.

	gcc/testsuite/
	* lib/target-supports.exp
	(check_effective_target_arm_little_endian): New.
	(check_effective_target_vect_pack_trunc): Use above.
	(check_effective_target_vect_unpack): Likewise.
	(check_effective_target_vect_element_align): Test
	check_effective_target_arm_vect_no_misalign for ARM.

From-SVN: r176050