and tarval_eor not getting correctly hashed)
- tarval_null and tarval_one are defined for irms_reference now
- introduce get_tarvall_all_one and get_mode_all_one which returns the value
  where all bits are 1 (defined for int, boolean and reference modes)
- fix TARVAL_CLASSIFY_ALL_ONE with this

[r15817]

Adapted execfreqs
Now an order of magnitude faster... at least in c-lex.c

[r15816]

[r15815]

[r15813]

[r15810]

[r15809]

[r15808]

[r15807]

make call arg/result verify a bit looser in backend (because we have half-fixed mode_b irgs sometimes

[r15806]

[r15805]

[r15804]

[r15803]

[r15802]

[r15801]

[r15800]

[r15799]

- removed some set_*_left(), these are bad for CSE
- CSE BugFix: lookup did not normalize the nodes right!

[r15798]

[r15796]

[r15795]

[r15794]

[r15793]

[r15792]

[r15791]

[r15790]

[r15789]

[r15788]

- Do not generate dest am for 8bit operations, because the stricter register constraints are not handled yet.

[r15787]

[r15786]

[r15785]

[r15784]

[r15783]

[r15782]

- -a - b -> -(a + b)
- a - -b -> a + b

[r15781]

[r15780]

Implement
- const - (a - b) -> (b - a) + -const
- const1 - (a * const2) -> (a * -const2) + -const1

[r15779]

- -a * const   -> a * -const
- -a * -b      -> a * b
- -a * (b - c) -> a * (c - b)
- (a - b) * -c -> (b - a) * c

[r15778]

[r15777]

[r15776]

[r15775]

[r15774]