ref: a9d67e014c29b320aeebc0b1e8bdf377cd9f5c0d
dir: /tests/execute/0135-unary.c/
int
main()
{
int x;
x = 3;
x = !x; // 0
x = !x; // 1
x = ~x; // -1
x = -x; // 2
if(x != 2)
return 1;
return 0;
}