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DIAG.UNEX.*
LANG.STRUCT.RC
LANG.STRUCT.UC

Code not exercised by analysis
Redundant condition
Unreachable {Call, Computation, Conditional, Control Flow, Data Flow}

Coverity

DEADCODE

UNREACHABLE

Can detect the specific instance where code can never be reached because of a logical contradiction or a dead "default" in switch statement

Can detect the instances where code block is unreachable because of the syntactic structure of the code

Can detect violations of this recommendation when the -Wunreachable-code flag is used

C1501, C1503, C2008, C2877, C2880, C2881, C2882, C2883,C3202, C3203, C3205, C3206, C3207, C3210, C3219, C3229, C3404, C3422, C3423, C3425, C3470

DF2877, DF2880, DF2881, DF2882, DF2883, DF2980, DF2981, DF2982, DF2983, DF2984, DF2985, DF2986

LA_UNUSED
UNREACH.GEN
UNREACH.RETURN
UNREACH.SIZEOF

1 J
139 S
140 S

Fully implemented

CERT_C-MSC07-a
CERT_C-MSC07-b
CERT_C-MSC07-c
CERT_C-MSC07-d
CERT_C-MSC07-e
CERT_C-MSC07-f
CERT_C-MSC07-g
CERT_C-MSC07-h
CERT_C-MSC07-i

There shall be no unreachable code in "else" block
There shall be no unreachable code after 'return', 'break', 'continue', and 'goto' statements
There shall be no unreachable code in "if/else/while/for" block
There shall be no unreachable code in switch statement
There shall be no unreachable code in 'for' loop
There shall be no unreachable code after 'if' or 'switch' statement
There shall be no unreachable code after "if" or "switch" statement inside while/for/do...while loop
Avoid switch with unreachable branches
Avoid unreachable methods

CERT C: Rule MSC07-C

Checks for:

• Code does not execute
• Default case is missing and may be reached
• Code following control-flow statements

S1763, S1751

Can detect violations of this recommendation when the -Wunreachable-code flag is used