- some code cleanup
- avoids the case where 2 dumpers are registered

The only user knwos, where its sp is.

bearch: Dump the output requirement and the assigned register in the same line for better readability.

ia32: Remove the parameter immediate_constraint_type, which is always 0, from create_immediate_or_transform().

sched_get_time_step() checks the same.

beverify: Simply use the register, which we already have, instead of fetching it again via its global index.

A comments starts with '#'.

It is impossible for a node in the schedule to be a Proj or not be scheduled.

Nobody should ask Projs for arch_irn_flags_t.