gcc/ChangeLog

	* config/s390/s390.c (s390_rtx_costs)
	(s390_cannot_force_const_mem, legitimate_pic_operand_p)
	(s390_preferred_reload_class, s390_reload_symref_address)
	(legitimate_reload_constant_p, print_operand): Wide int support.
	* config/s390/predicates.md ("const0_operand", "constm1_operand")
	("consttable_operand"): Likewise.
	("larl_operand"): Add a comment.
	* config/s390/s390.h (TARGET_SUPPORTS_WIDE_INT): Enable wide int
	support.