UNREACHCODE

Message        Code at or just after this location can never be
               executed<inline info>.

Description    The compiler has detected code that can never be
               executed.  Often unreachable code represents a real
               coding error such as a label that is incorrectly
               spelled, or a statement that was inserted on the
               wrong line.  But sometimes it occurs in good code as
               a result of logical expressions that depend only on
               the values of constants (typically through macro
               expansion).

User Action    Usually any code correction is obvious.  And often it
               is straightforward to rewrite compile-time logical
               expressions in terms of preprocessing constructs to
               avoid this diagnostic.  But in some programs it may
               be necessary to suppress this informational message
               explicitly in order to obtain a diagnostic-free
               compilation of production code, since rewriting the
               expression not to be evaluated at compile time would
               impact performance.