GitLab

- use mode_Iu for all nodes producing integer values (because registers are mode_Iu), this gives more possibilities for cse
- use mode_D for all nodes producing float values, this gives more possibilities for cse
- Introduce NoReg and Unknown nodes so we don't have strange projs from the start barrier
- Rewrite transform phase:
  - while transforming we now build a completely new graph on a new irg (while looking at the old graph)
  - no need to transform constants in advance anymore
  - several smaller fixes+cleanups

  where CSE is explicitely forbidden. This fixes some bugs where a cmp
  function was missing.
- Don't make all the nodes mode_T by default. They keep their normal mode
  node and only get set to mode_T is we actually use am_Dest
- get rid of src_mode and tgt_mode node attribute, you can get the modes
  by looking at the conv output mode and the arguments mode. This fixes
  some bugs where the src_mode and tgt_mode attributes were wrong
- cleaned up and fixed some bugs in addressmode optimisation

fixed Div/Mod mapper

Adapted to the new dependency edges