Can gcc make my code parallel?

I was wondering if there is an optimization in gcc that can make some single-threaded code like the example below execute in parallel. If no, why? If yes, what kind of optimizations are possible?

#include <iostream>

int main(int argc, char *argv[])
{
    int array[10];
    for(int i = 0; i < 10; ++ i){
        array[i] = 0;
    }
    for(int i = 0; i < 10; ++ i){
        array[i] += 2;
    }
    return 0;
}

Added:

Thanks for OpenMP links, and as much as I think it's useful, my question is related to compiling same code without the need to rewrite smth. So basically I want to know if:

1. Making code parallel(at least in some cases) without rewriting it is possible?
2. If yes, what cases can be handled? If not, why?