* config/s390/s390.c (preferred_la_operand_p): New function.
	* config/s390/s390-protos.h (preferred_la_operand_p): Declare it.
	* config/s390/s390.md ("addaddr_esame", "*la_ccclobber"): Replace by ...
	("*la_64_cc", "*la_31_cc", splitters): ... these.
	("*la_31"): Deactivate for TARGET_64BIT.
	("*la_31_and", "*la_31_and_cc"): New.

From-SVN: r57473