/* ---------- Protected / package fields, methods --------- */
void markDeadInstructions() {
// System.out.println("-- Identifying dead instructions for " + basicBlock.getID() + " -- ");
LiveVariablesProblem lvp = (LiveVariablesProblem) problem;
IRScope scope = lvp.getScope();
boolean scopeBindingHasEscaped = scope.bindingHasEscaped();
if (in == null) {
// 'in' cannot be null for reachable bbs
// This bb is unreachable! (or we have a mighty bug!)
// Mark everything dead in here!