Writing an Assembler

#include <stdio.h>

int main() {
  int x, y, z;

  x = 2222;
  y = 3333;
  z = x + y;

  printf("z is %d\n", z);
  return 0;
}

gcc -S -fverbose-asm -fomit-frame-pointer sum.c

.LFB0:
        .cfi_startproc
        pushq   %rbp    #
        .cfi_def_cfa_offset 16
        .cfi_offset 6, -16
        movq    %rsp, %rbp      #,
        .cfi_def_cfa_register 6
        subq    $16, %rsp       #,
# sum.c:6:   x = 2222;
        movl    $2222, -12(%rbp)        #, x
# sum.c:7:   y = 3333;
        movl    $3333, -8(%rbp) #, y
# sum.c:8:   z = x + y;
        movl    -12(%rbp), %edx # x, tmp88
        movl    -8(%rbp), %eax  # y, tmp89
        addl    %edx, %eax      # tmp88, tmp87
        movl    %eax, -4(%rbp)  # tmp87, z
# sum.c:10:   printf("z is %d\n", z);
        movl    -4(%rbp), %eax  # z, tmp90
        movl    %eax, %esi      # tmp90,
        leaq    .LC0(%rip), %rax        #, tmp91
        movq    %rax, %rdi      # tmp91,
        movl    $0, %eax        #,
        call    printf@PLT      #
# sum.c:11:   return 0;
        movl    $0, %eax        #, _6
# sum.c:12: }
        leave
        .cfi_def_cfa 7, 8
        ret
        .cfi_endproc

make sum
objdump -d sum