Computer Organization and Design MIPS Edition, 6th Edition

String copies usually use pointers instead of arrays in C to avoid the operations on i in the code above. See Section 2.14 for an explanation of arrays versus pointers.

Since the procedure strcpy above is a leaf procedure, the compiler could allocate i to a temporary register and avoid saving and restoring $s0. Hence, instead of thinking of the $t registers as being just for temporaries, we can think of them as registers that the callee should use whenever convenient. When a compiler finds a leaf procedure, it exhausts all temporary registers before using registers it must save.

Characters and Strings in Java

Unicode is a universal encoding ...