i386.c (legitimate_constant_p): UNSPEC_TP is not legitimate constant.

i386.c (legitimate_constant_p): UNSPEC_TP is not legitimate constant.

	* config/i386/i386.c (legitimate_constant_p): UNSPEC_TP is not
	legitimate constant.
	(legitimate_pic_operand_p): Neither pic operand.
	(legitimate_address_p): But legitimate address.
	(get_thread_pointer): Generate MEM/u instead of CONST around
	UNSPEC_TP.
	(print_operand): Remove printing of UNSPEC_TP.
	(print_operand_address): And print it here.

	* gcc.dg/tls/opt-2.c: New test.

From-SVN: r56143