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Avoid using the op_pin_state enum as that contains confusing additional
entries that are not valid on a node. The only remaining state for a
node is pinned/floating which we can simply represent with a 0/1 value.

This makes our usage of PhiMs to represent the observable behaviour of
non-terminating loops more obvious.
Having an explicit loop Phi constructor also fixes problems with Phi
getting optimized before the keep edge was added.

- Compound type selection is performed with Member
- Array indexing is performed with Sel
- Instead of the simpleSel constructor functions you can use the normal Member
  constructors now
- The concept of array element entities has been removed, Sel nodes just
  contain a pointer to the array type now.

This removes the strange entity/type duality and we get rid of union symconst_symbol.

It is not usefull for optimization in most languages:
- In C/C++ you can't really change the value of enum constants as casting
  from/to integer has to produce the expected results.
- In Java (and other OO languages) enum members are objects so the
  libfirm enumeration type can't be used there anyway

Just state the copyright and the project the files belong to. You can
then find the COPYING file for the whole project.

This means floatingpoint calculation in a firm graph must be performed
in the mode specified (and may not be performed in a wider mode as
before).

You can still attach NoMem if no memory input is present.
This makes it more consistent with the Call node and fixes failing
get_ASM_mem in case of no memory input.

Now every bit in the public API is documented so we can enable doxygen
warnings for undocumented members.

It should only be used by construction algorithms

- Put things into logical groups
- Add cross references from node overview to API docu

They're pointless with the new switch representation introduced a while
ago.

[r28346]

[r28345]

[r28239]

[r28238]

[r28188]

[r28127]

[r28116]

[r28097]

[r28062]

[r28043]

cleanup ircons code; add current_ir_graph independent construction bits; new_ir_graph does not set current_ir_graph anymore

[r28042]

[r28037]