mov     rax, QWORD PTR [rbp-48]     ; rax = argv
        add     rax, 8                      ; rax = &argv[1]
        mov     rdx, QWORD PTR [rax]        ; rdx = *rax = argv[1]
        mov     eax, DWORD PTR [rbp-20]     ; eax = i
        cdqe                                ; rax = (uint64_t) eax = (uint64_t) i
        add     rax, rdx                    ; rax = &rax[rdx] = &rdx[rax] = &argv[1][rax] = &argv[1][i]
        movzx   eax, BYTE PTR [rax]         ; eax = (uint32_t) *rax = (uint32_t) argv[1][i]
        movsx   eax, al                     ; ? - jakaś dziwna konwersja signed/unsigned?
        add     DWORD PTR [rbp-28], eax     ; v7 += eax