gcc/
	* rtl.h (rtvec_all_equal_p): Declare.
	(const_vec_duplicate_p, unwrap_const_vec_duplicate): New functions.
	* rtl.c (rtvec_all_equal_p): New function.
	* expmed.c (expand_mult): Use unwrap_const_vec_duplicate.
	* config/aarch64/aarch64.c (aarch64_vect_float_const_representable_p)
	(aarch64_simd_dup_constant): Use const_vec_duplicate_p.
	* config/arm/arm.c (neon_vdup_constant): Likewise.
	* config/s390/s390.c (s390_contiguous_bitmask_vector_p): Likewise.
	* config/tilegx/constraints.md (W, Y): Likewise.
	* config/tilepro/constraints.md (W, Y): Likewise.
	* config/spu/spu.c (spu_legitimate_constant_p): Likewise.
	(classify_immediate): Use unwrap_const_vec_duplicate.
	* config/tilepro/predicates.md (reg_or_v4s8bit_operand): Likewise.
	(reg_or_v2s8bit_operand): Likewise.
	* config/tilegx/predicates.md (reg_or_v8s8bit_operand): Likewise.
	(reg_or_v4s8bit_operand): Likewise.

From-SVN: r227041