ref: 0fb36627230e9c8defd681c61e4917a140fcc03f
dir: /tests/cc/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;
}