handlerMap = new IdentityHashMap<InstructionHandle, List<CodeExceptionGen>>();
codeToHandlerMap = new IdentityHashMap<InstructionHandle, List<CodeExceptionGen>>(); startInstructionToHandlerMap = new IdentityHashMap<InstructionHandle, CodeExceptionGen>();
	public ExceptionHandlerMap(MethodGen methodGen) {		handlerMap = new IdentityHashMap<InstructionHandle, List<CodeExceptionGen>>();		build(methodGen);	}