There might be some ProjL nodes reachable via out edges
and the following "local" phase does enqueue_users for
optimized nodes, which might visit the 'undead' ProjL.

We can still use ia32 ShlD, ShrD functions by matching Or(Shl,Shr)
patterns in the ia32 transformer.

add_block_cf_input breaks, if the block has two Bad inputs

Simplify: if (!irn_visited(x)) { mark_irn_visited(x); ... }  ->  if (!irn_visited_else_mark(x)) { ... }.

* removed unnecessary call_tp variable
* removed shadowed tp variable (twice)

Similiar to 9d207c0 the call lowering should always use the current
entity type, instead of the associate type, which may or may not be
a lowered type.

- is_lowered_type is not helpful, because the flag may already be set
  by lower_calls before. This flag should probably be removed in general.
- hence lower_mtp must not check for is_lowered_type
- lower_Start must update the entity type, but not lower_irg,
  otherwise lower_Start can not decide, whether a lowering is necessary.

remove names from parameters of method_types - it is pure debug info and should already be contained in type_dbg_info if available

[r28345]

[r28338]

Additionally:
- rename some variables to reflect its content
- add some doxygen comments

[r28327]

[r28276]

[r28196]

[r28127]

[r28086]

[r28084]

[r28074]

[r28062]

lower_dw: refactor to use a smart walk strategy and factoring out some common code to get a node_entry

[r28055]