[r26648]

[r26635]

[r26620]

- Introduced be_Start which is now used instead of iro_Start+be_RegParams
- further cleanups and fixes along the way

[r26549]

[r24066]

- add hash function for ia32 Immediates
- unified comments for all specifications

[r20629]

[r15927]

[r13849]

- Replace limit callback in register requirements with a simple bitset
- Fix backends, generators and the rest of the code for the change register
  requirements structure
- Eliminated the custom register_requirement structures in the backend, they
  are pointless now, use the normal arch_register_req_t
- Fix TEMPLATE backend
- Extract emitter framework from ia32 and provide generic header/code for it
- Port TEMPLATE backend to new emitter
- Extract gas specific emit stuff (declarations, sections) from ia32 backend
  and provide it as generic header/code. Make TEMPLATE backend use that
- Remove several FIRM_DBG_REGISTERs from functions which are called very often.
  Before we had millions of string hashtable lookups because of that. The
  prefered way is to have 1 static debug module per file and initialize it in
  the module constructor. No passing around in environment structs and in no
  case should you dynamically register it in single functions.

fixed emit

added alloca node

small emitter interface changes

fixed up reg param stuff

check for alloca and use ebp as stack register if found

added some comments

code refactoring
fixed indents

changed backend interface
improved emitter
fixed a lot of bugs

added register constraints for nodes

removed redundant ,

removed keys which are optional now
added Lea and Lea_i nodes

added new ops