misc-redundant-expression¶
Detect redundant expressions which are typically errors due to copy-paste.
Depending on the operator expressions may be
- redundant, 
- always - true,
- always - false,
- always a constant (zero or one). 
Examples:
((x+1) | (x+1))             // (x+1) is redundant
(p->x == p->x)              // always true
(p->x < p->x)               // always false
(speed - speed + 1 == 12)   // speed - speed is always zero