aarch64: Fix up commutative and early-clobber markers on compact insns

aarch64: Fix up commutative and early-clobber markers on compact insns

For constraints there are operand modifiers and constraint qualifiers.
Operand modifiers apply to all alternatives and must appear, in
traditional syntax before the first alternative.  Constraint
qualifiers, on the other hand must appear in each alternative to which
they apply.

There's no easy way to validate the distinction in the traditional md
format, but when using the new compact format we can enforce some
semantic checking of these characters to avoid some potentially
surprising code generation.

Fortunately, all of these errors are benign, but the two misplaced
early-clobber markers were quite suspicious at first sight - it's only
by luck that the second alternative does not need an early-clobber.

The syntax checking will be added in the following patch, but first of
all, fix up the errors in aarch64.md.

gcc/
	* config/aarch64/aarch64-sve.md (@aarch64_pred_<optab><mode>): Move
	commutative marker to the cons specification.
	(add<mode>3): Likewise.
	(@aarch64_pred_<su>abd<mode>): Likewise.
	(@aarch64_pred_<optab><mode>): Likewise.
	(*cond_<optab><mode>_z): Likewise.
	(<optab><mode>3): Likewise.
	(@aarch64_pred_<optab><mode>): Likewise.
	(*aarch64_pred_abd<mode>_relaxed): Likewise.
	(*aarch64_pred_abd<mode>_strict): Likewise.
	(@aarch64_pred_<optab><mode>): Likewise.
	(@aarch64_pred_<optab><mode>): Likewise.
	(@aarch64_pred_fma<mode>): Likewise.
	(@aarch64_pred_fnma<mode>): Likewise.
	(@aarch64_pred_<optab><mode>): Likewise.

	* config/aarch64/aarch64-sve2.md (@aarch64_sve_<su>clamp<mode>): Move
	commutative marker to the cons specification.
	(*aarch64_sve_<su>clamp<mode>_x): Likewise.
	(@aarch64_sve_fclamp<mode>): Likewise.
	(*aarch64_sve_fclamp<mode>_x): Likewise.
	(*aarch64_sve2_nor<mode>): Likewise.
	(*aarch64_sve2_nand<mode>): Likewise.
	(*aarch64_pred_faminmax_fused): Likewise.

	* config/aarch64/aarch64.md (*loadwb_pre_pair_<ldst_sz>): Move the
	early-clobber marker to the relevant alternative.
	(*storewb_pre_pair_<ldst_sz>): Likewise.
	(*add<mode>3_aarch64): Move commutative marker to the cons
	specification.
	(*addsi3_aarch64_uxtw): Likewise.
	(*add<mode>3_poly_1): Likewise.
	(add<mode>3_compare0): Likewise.
	(*addsi3_compare0_uxtw): Likewise.
	(*add<mode>3nr_compare0): Likewise.
	(<optab><mode>3): Likewise.
	(*<optab>si3_uxtw): Likewise.
	(*and<mode>3_compare0): Likewise.
	(*andsi3_compare0_uxtw): Likewise.
	(@aarch64_and<mode>3nr_compare0): Likewise.