In SystemVerilog simulation, the prepone region is one of the several regions in a given time slot. What is the actual purpose of this region? Can anyone explain this with a valid example?
The preponed region is a conceptual name for the state of all signals at the begining of the current time slot. The state of signals in the preponed region is by definition identical to the state of the postponed region of the previous time slot.
This preponed state is used as the sampled value for any signal used in an assertion except the clock. Using these sampling semantics eliminates the possibility of race conditions between the clock and the Boolean expression that is part of an assertion statement.