- Removed remaining optimizations that duplicate functionality of tcg.optimize_op_const.
- Don't call make_simple_ref if operation will be optimized away or replaced with another one, which calls make_simple_ref itself.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26515 3ad0048d-3df7-0310-abae-a5850022a9f2
  + character sets for central Europe added

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26516 3ad0048d-3df7-0310-abae-a5850022a9f2
  * fix building for OS/2 and EMX (additional include path necessary)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26517 3ad0048d-3df7-0310-abae-a5850022a9f2