RISC-V: Return machine_mode rather than opt_machine_mode for get_mask_mode, NFC

We always want get_mask_mode return a valid mode, it's something wrong
if it failed, so I think we could just move the `.require ()` into
get_mask_mode, instead of calling that every call-site.

The only exception is riscv_get_mask_mode, it might put supported mode
into get_mask_mode, so added a check with riscv_v_ext_mode_p to make
sure only valid vector mode will ask get_mask_mode.

gcc/ChangeLog:

	* config/riscv/autovec.md (abs<mode>2): Remove `.require ()`.
	* config/riscv/riscv-protos.h (get_mask_mode): Update return
	type.
	* config/riscv/riscv-v.cc (rvv_builder::rvv_builder): Remove
	`.require ()`.
	(emit_vlmax_insn): Ditto.
	(emit_vlmax_fp_insn): Ditto.
	(emit_vlmax_ternary_insn): Ditto.
	(emit_vlmax_fp_ternary_insn): Ditto.
	(emit_nonvlmax_fp_ternary_tu_insn): Ditto.
	(emit_nonvlmax_insn): Ditto.
	(emit_vlmax_slide_insn): Ditto.
	(emit_nonvlmax_slide_tu_insn): Ditto.
	(emit_vlmax_merge_insn): Ditto.
	(emit_vlmax_masked_insn): Ditto.
	(emit_nonvlmax_masked_insn): Ditto.
	(emit_vlmax_masked_store_insn): Ditto.
	(emit_nonvlmax_masked_store_insn): Ditto.
	(emit_vlmax_masked_mu_insn): Ditto.
	(emit_nonvlmax_tu_insn): Ditto.
	(emit_nonvlmax_fp_tu_insn): Ditto.
	(emit_scalar_move_insn): Ditto.
	(emit_vlmax_compress_insn): Ditto.
	(emit_vlmax_reduction_insn): Ditto.
	(emit_vlmax_fp_reduction_insn): Ditto.
	(emit_nonvlmax_fp_reduction_insn): Ditto.
	(expand_vec_series): Ditto.
	(expand_vector_init_merge_repeating_sequence): Ditto.
	(expand_vec_perm): Ditto.
	(shuffle_merge_patterns): Ditto.
	(shuffle_compress_patterns): Ditto.
	(shuffle_decompress_patterns): Ditto.
	(expand_reduction): Ditto.
	(get_mask_mode): Update return type.
	* config/riscv/riscv.cc (riscv_get_mask_mode): Check vector type
	is valid, and use new get_mask_mode interface.

0 files changed, 0 insertions, 0 deletions