arm&aarch64: subdivide the type attribute "alu_shfit_imm"

arm&aarch64: subdivide the type attribute "alu_shfit_imm"

The type attribute "alu_shfit_imm" is subdivided into
"alu_shift_imm_lsl_1to4" and "alu_shift_imm_other", to accommodate
optimazations of some microarchitectures.

Here is the detailed discussion.
https://gcc.gnu.org/pipermail/gcc/2020-September/233594.html

gcc/
	* config/arm/types.md (define_attr "autodetect_type"): New.
	(define_attr "type"): Subdivide alu_shift_imm.
	* config/arm/common.md: New file.
	* config/aarch64/predicates.md:Include common.md.
	* config/arm/predicates.md:Include common.md.
	* config/aarch64/aarch64.md (*add_<shift>_<mode>): Set autodetect_type.
	(*add_<shift>_si_uxtw): Likewise.
	(*sub_<shift>_<mode>): Likewise.
	(*sub_<shift>_si_uxtw): Likewise.
	(*neg_<shift>_<mode>2): Likewise.
	(*neg_<shift>_si2_uxtw): Likewise.
	* config/arm/arm.md (*addsi3_carryin_shift): Likewise.
	(add_not_shift_cin): Likewise.
	(*subsi3_carryin_shift): Likewise.
	(*subsi3_carryin_shift_alt): Likewise.
	(*rsbsi3_carryin_shift): Likewise.
	(*rsbsi3_carryin_shift_alt): Likewise.
	(*arm_shiftsi3): Likewise.
	(*<arith_shift_insn>_multsi): Likewise.
	(*<arith_shift_insn>_shiftsi): Likewise.
	(subsi3_carryin): Set new type.
	(*if_arith_move): Set new type.
	(*if_move_arith): Set new type.
	(define_attr "core_cycles"): Use new type.
	* config/arm/arm-fixed.md (arm_ssatsihi_shift): Set autodetect_type.
	* config/arm/thumb2.md (*orsi_not_shiftsi_si): Likewise.
	(*thumb2_shiftsi3_short): Set new type.
	* config/aarch64/falkor.md (falkor_alu_1_xyz): Use new type.
	* config/aarch64/saphira.md (saphira_alu_1_xyz): Likewise.
	* config/aarch64/thunderx.md (thunderx_arith_shift): Likewise.
	* config/aarch64/thunderx2t99.md (thunderx2t99_alu_shift): Likewise.
	* config/aarch64/thunderx3t110.md (thunderx3t110_alu_shift): Likewise.
	(thunderx3t110_alu_shift1): Likewise.
	* config/aarch64/tsv110.md (tsv110_alu_shift): Likewise.
	* config/arm/arm1020e.md (1020alu_shift_op): Likewise.
	* config/arm/arm1026ejs.md (alu_shift_op): Likewise.
	* config/arm/arm1136jfs.md (11_alu_shift_op): Likewise.
	* config/arm/arm926ejs.md (9_alu_op): Likewise.
	* config/arm/cortex-a15.md (cortex_a15_alu_shift): Likewise.
	* config/arm/cortex-a17.md (cortex_a17_alu_shiftimm): Likewise.
	* config/arm/cortex-a5.md (cortex_a5_alu_shift): Likewise.
	* config/arm/cortex-a53.md (cortex_a53_alu_shift): Likewise.
	* config/arm/cortex-a57.md (cortex_a57_alu_shift): Likewise.
	* config/arm/cortex-a7.md (cortex_a7_alu_shift): Likewise.
	* config/arm/cortex-a8.md (cortex_a8_alu_shift): Likewise.
	* config/arm/cortex-a9.md (cortex_a9_dp_shift): Likewise.
	* config/arm/cortex-m4.md (cortex_m4_alu): Likewise.
	* config/arm/cortex-m7.md (cortex_m7_alu_shift): Likewise.
	* config/arm/cortex-r4.md (cortex_r4_alu_shift): Likewise.
	* config/arm/exynos-m1.md (exynos_m1_alu_shift): Likewise.
	* config/arm/fa526.md (526_alu_shift_op): Likewise.
	* config/arm/fa606te.md (606te_alu_op): Likewise.
	* config/arm/fa626te.md (626te_alu_shift_op): Likewise.
	* config/arm/fa726te.md (726te_alu_shift_op): Likewise.
	* config/arm/fmp626.md (mp626_alu_shift_op): Likewise.
	* config/arm/marvell-pj4.md (pj4_shift): Likewise.
	(pj4_shift_conds): Likewise.
	(pj4_alu_shift): Likewise.
	(pj4_alu_shift_conds): Likewise.
	* config/arm/xgene1.md (xgene1_alu): Likewise.
	* config/arm/arm.c (xscale_sched_adjust_cost): Likewise.