- add architecture for trampoline builder
- implemented trampoline builder for x86

[r24418]

Repairing one case in the tarval module broke another, of course.  Repair a bit more and hopefully break a bit less.

[r24413]

[r24410]

[r24406]

[r24403]

[r24387]

[r24385]

[r24367]

  can arise in dead loops. We already fixed this bug in Phi-optimization, but
  it still exists in SSA-construction, ARG!
  This fixes compilerhang5.c
- clean up if condition by using DeMorgan

[r24332]

[r24331]

[r24329]

[r24320]

[r24298]

- add support for Psi(Cmp(!mode_float), Const(mode_float), Const(mode_float))

[r24295]

[r24294]

[r24293]

[r24292]

[r24260]

[r24259]

[r24252]

[r24196]

[r24190]

[r24189]

[r24188]

[r24187]

[r24186]

Perform dark rituals and resurrect ProduceVal.  We are not ready to dispose it, yet, because the Spiller is too clever for the Keep-trick.

[r24182]

[r24179]

[r24178]

[r24176]

[r24175]

Remove ProduceVal. Replace it by Xor0 (to produce 0), Sbb0 (to produce 0/-1) and by Keep to make Cltd register pressure faithful.

[r24128]

[r24125]

[r24124]

[r24123]

[r24121]

[r24117]

[r24112]

[r24111]

[r24109]