this.exitBlockSet = new BitSet();
		public Subroutine(InstructionHandle start) {			this.start = start;			this.instructionSet = new BitSet();			this.cfg = new CFG();			this.blockMap = new IdentityHashMap<InstructionHandle, BasicBlock>();			this.escapeTargetListMap = new IdentityHashMap<BasicBlock, List<EscapeTarget>>();			this.returnBlockSet = new BitSet();			this.unhandledExceptionBlockSet = new BitSet();			this.workList = new LinkedList<WorkListItem>();		}