Auto vectorization of loops

Hi! I’m trying to understand why do I get loop unrolling instead of vectorization in this code (Compiler Explorer)? I definitely know that this C code will be vectorized: void sqr(const int* restrict src, int* restrict dest, unsigned int len) { for(int i = 0; i < len; i++){ dest[i] = src[i] * src[i]; } } Could somebody explain where am I wrong, please?