refactoring: set_frame_entity is a special callbacks for users of the advanced spillslot coalescing interface and not a generic bearch callback thingy anymore

[r27736]

[r27723]

[r27687]

[r27653]

[r26778]

[r26720]

[r26645]

- Introduced be_Start which is now used instead of iro_Start+be_RegParams
- further cleanups and fixes along the way

[r26549]

	* 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]

[r26535]

- make phi nodes use backend_info instead of phi_handler hashmaps

[r26332]

- SymConst's are now ALWAYS placed in the start block

[r26236]

[r25379]

	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]

[r22889]

Remove the unused attribute const arch_env_t *arch_env from struct phi_handler and also the then unused parameter be_main_env_t *env from be_phi_handler_new().

[r22758]

[r22740]

[r22739]

[r22734]

[r22732]

[r22715]

- removed arch_irn_handler stuff

[r19738]

[r19733]

greater function...

[r19732]

[r19715]

- simplified be_node_classify()

[r19711]

- instead of issuing a rep ret, issue a ret 0 as recommended in k10 optimization manual

[r19344]

- fix pic trampolines not being generated twice

[r19205]

- constify some functions
- more doxygen comments

[r17136]

[r16200]

- Mark struct returning calls as modify_stack
- Cleanup benode a bit

[r16034]

[r16018]

[r15901]

[r15882]

[r15623]

- removed be_FrameLoad and be_FrameStore nodes which weren't used anymore
- removed be_StackParam and replace it with Load(be_FrameAddr) constructs

[r15610]

[r15609]

[r15173]

Moving nodes (mainly reloads) through Perms if they need not to be permed.
Also fixed bug in liveness.

[r14538]

[r14518]