@Test
	public void branchInstr_testInvalidRegisterRef() { //Checks instr. not created with invalid register ref.
		try {
			instr = new BranchInstr(Opcode.BRNE, 19, 25);
		}
		catch (IllegalStateException e) {
			System.out.println(e.getMessage());
		}
		assertNull(instr);
	}