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unreachable-code

statement-sideeffect

DIAG.UNEX.*
LANG.STRUCT.EBS
LANG.STRUCT.RC
MISC.NOEFFECT
LANG.STRUCT.UC
LANG.STRUCT.UA
LANG.STRUCT.UULABEL
LANG.STRUCT.UUMACRO
LANG.STRUCT.UUPARAM
LANG.STRUCT.UUTAG
LANG.STRUCT.UUTYPE
LANG.STRUCT.UUVAR

Code not exercised by analysis
Empty branch statement checks
Redundant condition
Function call has no effect
Unreachable code checks
Useless assignment
Unused Label
Unused Macro
Unused Parameter
Unused Tag
Unused Type
Unused Variable

Coverity

NO_EFFECT

DEADCODE

UNREACHABLE

Finds statements or expressions that do not accomplish anything or statements that perform an unintended action.

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

ECLAIR

CC2.MSC12

Partially implemented

3.0

-Wunused-value
-Wunused-parameter


Options detect unused local variables, nonconstant static variables and unused function parameters, or unreachable code respectively.

CWARN.NOEFFECT.SELF_ASSIGN
CWARN.NOEFFECT.UCMP.GE
CWARN.NOEFFECT.UCMP.GE.MACRO
CWARN.NOEFFECT.UCMP.LT
CWARN.NOEFFECT.UCMP.LT.MACRO
CWARN.NULLCHECK.FUNCNAME
EFFECT
INVARIANT_CONDITION.UNREACH
LA_UNUSED
MISRA.STMT.NO_EFFECT
UNREACH.GEN
UNREACH.RETURN
UNREACH.SIZEOF
VA_UNUSED.GEN
VA_UNUSED.INIT

Partially implemented

Dead code

Unreachable code

Use of memset with size argument zero

Code does not execute

Default case is missing and may be reached

Size argument of function in memset family is zero

3426, 3427, 3307, 3110, 3112, 3404, 1501, 1503, 2008, 2880, 2881, 2882, 2883, 2877, 3196, 3202, 3203, 3205, 3206, 3207, 3210, 3219, 3229, 3404, 3422, 3423, 3425, 3470, 2980, 2981, 2982, 2983, 2984, 2985, 2986

statement-sideeffect

 -standard

The default mode checks for unreachable code.