[BUG] GCC optimizes away the write with `benchmark::DoNotOptimize`

void f() {
    int *a = new int[1 << 16];
    for (int i = 0; i < 1 << 16; i++) {
        benchmark::DoNotOptimize(a[i] = 10); // this is optimized away by the compiler
    }
    delete[] a;
}