re PR target/81305 ([avr] avrtiny uses LDS for SREG in ISR routines which is out...

re PR target/81305 ([avr] avrtiny uses LDS for SREG in ISR routines which is out of range of LDS.)

gcc/
	PR target/81305
	* config/avr/avr.c (avr_out_movhi_mr_r_xmega) [CONSTANT_ADDRESS_P]:
	Don't depend on "optimize > 0".
	(out_movhi_r_mr, out_movqi_mr_r): Same.
	(out_movhi_mr_r, out_movqi_r_mr): Same.
	(avr_address_cost) [CONSTANT_ADDRESS_P]: Don't depend cost for
	io_address_operand on "optimize > 0".
	* testsuite/gcc.target/avr/torture/isr-01-simple.c: New test.
	* testsuite/gcc.target/avr/torture/isr-02-call.c: New test.
	* testsuite/gcc.target/avr/torture/isr-03-fixed.c: New test.

From-SVN: r249995