hi.

I have C/C++ code, that looks like this:

static int function(double *I) {
    int n = 0;
    // more instructions, loops,
    for (int i; ...; ++i)
        n += fabs(I[i] > tolerance);
    return n;
}

function(I); // return value is not used.

compiler inlines function, however it does not optimize out n manipulations. I would expect compiler is able to recognize that value is never used as rhs only. Is there some side effect, which prevents optimization?

Thanks