* config/s390/s390.md ("builtin_setjmp_setup"): Insn deleted.
("builtin_longjmp"): Insn deleted.
("save_stack_nonlocal"): Save literal pool base pointer behind
backchain and stack pointer.
("restore_stack_nonlocal"): Restore literal pool base pointer.
* config/s390/s390.h (STACK_SAVEAREA_MODE): Double size of
the stack save area for the nonlocal goto case.