See also illegal . A hardware protection state in which the processor can only run unprivileged instructions. The processor's unprivileged state supports the virtual machine's operating system state and problem state. Contrast with privileged state . Code that cannot be reached during program execution.
Unreachable code is detected and removed as part of optimization.
In Ada language, subprograms unused only within the context of a specific program or set of units. For example, a program might call only a small subset of subprograms in a utility package. Pertaining to a mapped window with an unmapped ancestor. The procedure of modifying a program or program option that exists on the mass storage medium of a computer, making the program executable, and ensuring that the modified program interacts properly with all other affected programs in the system. An improvement for some part of the system.