removed old assert() in tarval_cmp() float case

[r6126]

[r6123]

in the new one

Code Placement: replaced get_nodes_block() calls by get_irn_n() to avoid
new assertion that checks block usage in floating graphs

[r6122]

[r6120]

[r6118]

[r6117]

[r6114]

[r6110]

[r6109]

[r6108]

removed depth from debug macros (not supported by libfirm's irprintf())

[r6107]

not in every case there is a check for an Alloc()

[r6106]

added debug function

[r6105]

[r6104]

[r6103]

added (a - x) + x optimization
removed #if 0 code
used is_Bad()

[r6102]

[r6101]

used new get_negated_pnc()

[r6100]

added new dead block optimization flag

[r6099]

[r6098]

[r6097]

added additional option for algebraic simplifications

[r6096]

[r6095]

get_negated_pnc() now used the mode to supress unordered bit
on modes that do not have them.

[r6094]

[r6093]

added doxygen comment

[r6092]

removed old comment

[r6091]

[r6090]

[r6086]

[r6085]

[r6082]

[r6081]

[r6080]

new i/f for compute_value_confirm_cmp

[r6079]

[r6078]

[r6077]

[r6076]

CVS---------------------------------------------------------------------

[r6075]

[r6074]

indentation fixed

[r6073]