Author: Julia Lawall <Julia.Lawall@lip6.fr> Delete successive tests to the same location. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @s exists@ local idexpression y; expression x,e; @@ *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) ) { … when forall return …; } … when != \(y = …