becopyilp2: Factorise common code.

Also remove useless pointer to int casts.
all: Use is_$OP(x) instead of get_irn_opcode(x) == iro_$OP.
all: Make formatting of else clauses more consistent.
all: Use get_irn_opname(x) instead of get_op_name(get_irn_op(x)).
irdump: Sort cases.
irdump: Do not dump the mode of Cmp nodes.
irdump: Streamline printing modes on node labels.

- Always print mode for Bad and Proj
- Do not print mode M and X