- The pns of X_regular and X_except are annotated in the opcode now.
- The memory input is annotated in the opcode now
- only nodes with X_regular, X_except are marked fragile

when calling exchange, set_irn_n, or set_irn_in.

fixes backend/inconsistent_outs test case

See http://www.libfirm.org/Unreachable_Code for details

add unknown_jump opflag for the special case of a jump where we can't directly influence the destination and can't predict/change them

[r28346]

[r28345]

[r28340]

[r28310]

remove get_irn_modename, get_irn_modeident from public API. It's unclear why we need an explicit combination of get_irn_mode and get_mode_name

[r28240]

[r28234]

[r28127]

[r28079]

[r28043]

[r28021]

[r28020]

differentiate between Bad and Deleted (because of exchange) nodes, this avoid some invalid memory accesses when trying to get irg from a Bad node

[r28019]

[r27944]

[r27833]

[r27762]

[r27346]

[r27328]

[r27300]

- rework ir_phase API
(sorry for mixing these 2 things into 1 commit)

[r27285]

[r27277]

- remove a bunch of code which unexpectedly dependent on current_ir_graph being
  set to something
- fix unnecessary double creation of backedge arrays in some cases

[r27265]

[r27254]

[r27239]

- reduced number of calls
- kicked C99 comment

[r27230]

[r27182]