ref: 61d8ab34d1ccd7ffdc3fd0e3fe73bf1a87bf0af6 dir: /tests/cc/execute/0036-notneg.c/
int main() { int x; x = 4; if(!x != 0) return 1; if(!!x != 1) return 1; if(-x != 0 - 4) return 1; return 0; }