Synopsis

A part of the application is never executed.

Enabled by default

Yes

Severity/Certainty

Low/Medium

Full description

There are statements in the application that cannot be reached on at least some execution paths. Dead code might indicate problems with the application's branching structure. This check is identical to MISRAC2004-14.1, MISRAC++2008-0-1-1, MISRAC++2008-0-1-9, MISRAC2012-Rule-2.1_b, MISRAC++2023-0.0.1.

Coding standards

Code examples

The following code example fails the check and will give a warning:

#include <stdio.h>

int f(int mode) {
    switch (mode) {
        case 0:
            return 1;
            printf("Hello!"); // This line cannot execute.
        default:
            return -1;
    }
}

The following code example passes the check and will not give a warning about this issue:

#include <stdio.h>

int f(int mode) {
    switch (mode) {
        case 0:
            printf("Hello!"); // This line can execute.
            return 1;
        default:
            return -1;
    }
}