Causes of redundancy Redundant operations are at the source level a side effect of having written the program in a high-level language Each of high-level data-structure accesses expands into a number of low-level arithmetic operations Programmers are not aware of these low-level operations and cannot eliminate the redundancies themselves. By having a compiler eliminate the redundancies The programs are both efficient and easy to maintain. CS308 Compiler Theory 4Causes of Redundancy • Redundant operations are – at the source level – a side effect of having written the program in a high-level language • Each of high-level data-structure accesses expands into a number of low-level arithmetic operations • Programmers are not aware of these low-level operations and cannot eliminate the redundancies themselves. • By having a compiler eliminate the redundancies – The programs are both efficient and easy to maintain. CS308 Compiler Theory 4