treed

#include <smmintrin.h>

typedef union __attribute__((aligned(16))) {
    unsigned char bytes[16];
    __m128i vec;
} vec_bytes_128;

int main() {
    int length = 3;
    vec_bytes_128 in = { 'a', 'e', 'e', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };