It was a member of ir_prog before but not correctly handled.

The first block in a new ir_graph is not an immature block anymore. The
end block is matured in irg_finalize_cons() now (since maturing blocks
twice doesn't hurt this shouldn't break existing code).

The opcode list was a member of irprog before which wasn't really
handled consistently. Also make sure opcodes are properly freed at
ir_finish().

unknown_type, code_type, none_type, unknown_entity reference are hold in
the irprog now. This makes handling more consistent since now all types
and entities are equally part of irprog.

memops are nodes that have memory inputs, you can generically query them
for their memory input. We can also get rid of get_fragile_op_mem in
favor of get_memop_mem.

This is the new way of handling switch-jumps. The node contains a table
which maps (ranges of) input values to proj numbers. Compared to a
Cond-node this results in a clean consecutive sequence of Proj numbers
(no searching for a free number for the default_pn anymore) and allows
factoring multiple cases jumping to the same block in a single Proj
(though we still need the optimisation in cfopt for that).

The main change here is splitting new_ir_mode into new_int_mode,
new_reference_mode and new_float_mode. You can now specify
mantissa+exponent size in new_float_mode. This also changes:

- x86 80bit-FP mode is NOT a ieee754 don't put "ieee754" into functions
  names that can also handle x86 80bit fps
- Move ieee_descriptor_t from tarval module into ir_mode struct
  (and rename to float_descriptor_t)
- Introduce mode_Q which represents binary128 from ieee754
- You can ask float modes for mantissa/exponent sizes now
- Fix endianess when emitting big float values in begnuas
- A bunch of long double fixes in ia32: the mode there has 10bytes
  (80bit) but the variables typically are 12 or 16 byte big
- This fixes some problems of sparc binary128 handling

There were no users and no tarval support anyway.

The new interface uses no complicated callbacks anymore, but is a simple
ir_node* -> void* nodemap. Adapted all users of ir_phase for this.

Noone is really using these informations at the moment and they weren't
correctly invalidated anyway.

API change: removes set_irg_outs_inconsistent and get_irg_outs_state
Use set_irg_state and is_irg_state instead!

- 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

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

[r28457]

[r28346]

[r28345]

[r28234]

[r28127]

[r28116]

[r28062]

[r28057]