* config/s390/s390.h (EXTRA_CC_MODES): Add CCLmode.
(SELECT_CC_MODE): Use s390_select_ccmode.
* config/s390/s390-protos.h (s390_select_ccmode): Add.
* config/s390/s390.c (s390_select_ccmode): New.
(s390_match_ccmode): Add CCLmode.
(s390_branch_condition_mask, s390_branch_condition_mnemonic): New.
(output_branch_condition, output_inverse_branch_condition): Removed.
(print_operand): Use s390_branch_condition_mnemonic.
* config/s390/s390.md (addsi3_cc, addsi3_cconly, addsi3_cconly2,
subsi3_cc, subsi3_cconly): Use logical instructions and CCLmode.
(bunordered, bordered, buneq, bungt, bunlt, bnuge, bunle, bltgt): New.

* config/s390/s390.c (check_and_change_labels): Preserve CC mode
when converting conditional branches to far branches.
* config/s390/s390.md (cmpstr_const, cmpstr_64, cmpstr_31, cmpint_si,
cmpint_di): Use CCSmode instead of CCUmode.

* config/s390/s390.c (legitimate_la_operand_p): New.
* config/s390/s390-protos.h (legitimate_la_operand_p): Add.
* config/s390/s390.md (movsi): Convert load address patterns to
arithmetic operations when necessary.
(addaddr_picR, addaddr_picL, addaddr_picN): Removed.
(do_la): Renamed to *do_la and use legitimate_la_operand_p.
(*do_la_reg_0): Don't use before reload.

* config/s390/s390.c (legitimize_address): Make more efficient
use of two-register addressing mode.

* config/s390/s390.c (s390_function_prologue): Fix incorrect prolog
with -mno-backchain in some corner cases.

* config/s390/s390.md (cmpsi_cct): Operands 0 and 1 do not commute.

From-SVN: r45891