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  (We have a separate get_input, and get_output callback for now).
  This should make the code faster for now and is a first step towards
  changing the interface to query register constraints on the mode_T node
  itself instead of the Proj nodes.
- Handle middleend node constraints and stuff in benode.c instead of in each
  backend
- Remove irn_class_branch we already had is_cfop in the middleend
- Fix a bunch of bugs/problems in the process

[r26320]

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

[r26236]

[r25585]

[r25529]

[r24294]

[r24088]

  this prevents some nasty warnings about unreachable Tuples
  in the back end

[r24016]

[r23897]

[r23894]

[r23750]

[r23665]

Generate new_bd_* instead of new_rd_* functions in the backend.  The nodes are always created on the current irg.

[r23535]

[r22754]

[r19743]

- simplified be_node_classify()

[r19711]

[r17510]

[r17273]

[r17156]

[r17143]

[r17007]

[r16921]

[r16372]

[r16257]

[r16249]

[r16181]

[r16079]

[r16078]

[r16029]

[r15990]

Treat the lower word of lowered 64bit operations always as unsigned. Using the same signedness as the high word is wrong (for example x < 0).

[r15868]

[r15776]

- support SourceAM for convs
- allow Source/DestAM for 8/16bit modes where this is profitable

[r15770]

[r15745]

[r15730]

[r15694]

[r15617]

[r15595]

[r15512]

[r15505]

[r15503]