ProgramStateRef
ProgramStateManager::removeDeadBindings(ProgramStateRef state,
const StackFrameContext *LCtx,
SymbolReaper& SymReaper) {
// This code essentially performs a "mark-and-sweep" of the VariableBindings.
// The roots are any Block-level exprs and Decls that our liveness algorithm
// tells us are live. We then see what Decls they may reference, and keep
// those around. This code more than likely can be made faster, and the
// frequency of which this method is called should be experimented with
// for optimum performance.
ProgramState NewState = *state;
NewState.Env = EnvMgr.removeDeadBindings(NewState.Env, SymReaper, state);
// Clean up the store.
StoreRef newStore = StoreMgr->removeDeadBindings(NewState.getStore(), LCtx,
SymReaper);
NewState.setStore(newStore);
SymReaper.setReapedStore(newStore);
return getPersistentState(NewState);
}
const ProgramState *ProgramState::makeWithStore(const StoreRef &store) const {
ProgramState NewSt = *this;
NewSt.setStore(store);
return getStateManager().getPersistentState(NewSt);
}
