[AArch64] Tighten predicates on SIMD shift intrinsics

[AArch64] Tighten predicates on SIMD shift intrinsics

gcc/

	* config/aarch64/aarch64-protos.h (aarch64_simd_const_bounds): Delete.
	* config/aarch64/aarch64-simd.md (aarch64_<sur>q<r>shl<mode>): Use
	new predicates.
	(aarch64_<sur>shll2_n<mode>): Likewise.
	(aarch64_<sur>shr_n<mode>): Likewise.
	(aarch64_<sur>sra_n<mode>: Likewise.
	(aarch64_<sur>s<lr>i_n<mode>): Likewise.
	(aarch64_<sur>qshl<u>_n<mode>): Likewise.
	* config/aarch64/aarch64.c (aarch64_simd_const_bounds): Delete.
	* config/aarch64/iterators.md (ve_mode): New.
	(offsetlr): Remap to infix text for use in new predicates.
	* config/aarch64/predicates.md (aarch64_simd_shift_imm_qi): New.
	(aarch64_simd_shift_imm_hi): Likewise.
	(aarch64_simd_shift_imm_si): Likewise.
	(aarch64_simd_shift_imm_di): Likewise.
	(aarch64_simd_shift_imm_offset_qi): Likewise.
	(aarch64_simd_shift_imm_offset_hi): Likewise.
	(aarch64_simd_shift_imm_offset_si): Likewise.
	(aarch64_simd_shift_imm_offset_di): Likewise.
	(aarch64_simd_shift_imm_bitsize_qi): Likewise.
	(aarch64_simd_shift_imm_bitsize_hi): Likewise.
	(aarch64_simd_shift_imm_bitsize_si): Likewise.
	(aarch64_simd_shift_imm_bitsize_di): Likewise.

gcc/testsuite/

	* gcc.target/aarch64/simd/vqshlb_1.c: New.

From-SVN: r215612