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	* benodes store the out register requirements in backend_info now
	  (this is work towards killing the register_requirement callbacks)
	* ir_graph has a pointer to beirg now
	* Other cleanups

[r26540]

- implemented a pass manager, so optimizations could be added in advance to "a pass" and run an once as a pipeline
- two managers yet: graph manager runs passes on all graphs of an irp, prog manager runs passes on all irp's (currently only one)

[r26344]

[r26222]

Bad nodes just like on Block nodes.
This simplifies get_irn_irg() and implements the idea the the irg can
be retrieved from "the block" of a node.

[r26188]

[r26093]

[r26080]

- Introduce the concept of the graph state bitset: This is a set of flags that indicate the current "state" of a graph.
  (Used so far to indicate wether muxes are lowered and should not be touched anymore and wether architecture dependent mul and div with constant implementations are used)
  We should use this to indicate dom/loop/... consistency in the fututure
- fixed a bug where lower_mode_b was creating a "set" instruction with the help of a Mux. (Maybe we should create a new Node for this and not use a 0/1 mux?)

[r25937]

[r25776]

[r25773]

[r25770]

[r25767]

[r25766]

[r25750]

[r25749]

  and seems generally to be a good idea

[r25572]

[r25544]

Access to value_type entities is now given by the frame pointer.

[r25246]

[r24785]

[r24504]

[r23326]

[r23235]

	Node flags and node registers are stored in a generic backend_info struct now
	instead of every part of the backend doing custom (and slow) stuff

[r23142]

[r23051]

- fixed indentation

[r22925]

[r22695]

[r22180]

[r22177]

entity has it's address_taken, was written, read or only parts of it read/written.

[r22147]

[r21148]

[r20935]

[r20827]

[r20692]

[r19868]

[r19773]

[r19748]

[r19499]

- reordered some struct attributes for better 64bit memory layout

[r19477]

- removed the unused globals Proj
- BugFix: is_tls_pointer()

[r19268]

[r19098]

code than ...

[r17833]