Synchronization of constraints

[nofiv]

AsmBlock could contain a synchronization function which would rebuild the block in a way to really correspond to the constraints(if one changes them). AsmConstrainTo could also contain information about type of jump(<=, >=, >, <...). Afterwards functions for "copying" and "pasting" basic blocks and series of basic blocks could be made. They could be "pasted" between particular basic blocks.