re PR target/50447 ([avr] Better support of AND, OR, XOR and PLUS with constant integ...

re PR target/50447 ([avr] Better support of AND, OR, XOR and PLUS with constant integers for 16- and 32-bit values)

	* config/avr/avr.md (adjust_len): Add alternatives "tsthi",
	"tstsi", "compare".
	(*cmpqi_sign_extend): Use s8_operand.
	(*cmphi, *cmpsi): Rewrite using avr_out_compare.
	* config/avr/avr-protos.h (compare_diff_p, compare_eq_p): Remove
	prototypes.
	(out_tsthi, out_tstsi): Remove prototypes.
	(avr_out_tsthi, avr_out_tstsi): New prototypes.
	* config/avr/avr.c (out_tsthi, out_tstsi): Remove functions.
	(avr_asm_len): Negative length now sets *plen to -length.
	(compare_sign_p): Return bool instead of int.
	(compare_diff_p, compare_eq_p): Ditto and make static.
	(avr_out_tsthi): New function.
	(avr_out_tstsi): New function.
	(avr_out_compare): New function.
	(adjust_insn_length): Handle ADJUST_LEN_TSTHI, ADJUST_LEN_TSTSI,
	ADJUST_LEN_COMPARE.
	PR target/50447

From-SVN: r179124