Add a phase before coloring thats split all live variables before each instruction that defines a paired value.

This also plugs liveness related memory leaks

The opcode list was a member of irprog before which wasn't really
handled consistently. Also make sure opcodes are properly freed at
ir_finish().

It should only be used by construction algorithms

Make sure all types are in the global type list, remove type_walk_prog
which was a strange alternative to type_walk attempting to not miss
types not in the global list.

This should fix problems with uninitialized backends when
be_get_backend_param() wasn't called also calls be_lower_for_target if
the user hasn't done so yet.

get_backend_irg_list - none of our backends uses it and in the future
                       the backend should drive the compilation and not
                       give hints to a generic driver
reg_class_alignment  - unused

This also means that dependent modules like bedbgout should be
initialized by begnuas.

Simplify usage of LC_OPT_ENT_STR(): The length of the buffer is determined in the macro, not passed as parameter.

adapted to changes

Like the comment says "we can't have Bad-blocks".
However, optimize_cf does not remove them anymore.

[r28331]

[r28172]

[r28127]

[r28072]

[r28071]

[r28030]