user: Demonstrate the C code that generates the assembly output below:

```asm
<fib>:
  endbr64
  cmp    $0x1,%edi
  je     L423
  mov    %edi,%eax
  cmp    $0x2,%edi
  je     L289
  push   %r15
  sub    $0x2,%eax
  xor    %r9d,%r9d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %eax,0xc(%rsp)
  mov    %r9d,0x10(%rsp)
L336:
  mov    0xc(%rsp),%edi
  lea    0x1(%rdi),%eax
  test   %edi,%edi
  je     L146
  cmp    $0x2,%eax
  je     L98
  movl   $0x0,0x4(%rsp)
  lea    -0x1(%rdi),%esi
L159:
  lea    0x1(%rsi),%eax
  test   %esi,%esi
  je     L220
  cmp    $0x2,%eax
  je     L324
  movl   $0x0,0x8(%rsp)
  lea    -0x1(%rsi),%ecx
  mov    %esi,0x18(%rsp)
L245:
  lea    0x1(%rcx),%eax
  test   %ecx,%ecx
  je     L523
  cmp    $0x2,%eax
  je     L496
  xor    %esi,%esi
  mov    %ecx,0x1c(%rsp)
  lea    -0x1(%rcx),%r8d
  mov    %esi,0x14(%rsp)
  mov    %r8d,%r15d
L281:
  lea    0x1(%r15),%eax
  test   %r15d,%r15d
  je     L4
  cmp    $0x2,%eax
  je     L39
  xor    %r9d,%r9d
  lea    -0x1(%r15),%r10d
  mov    %r15d,0x20(%rsp)
  mov    %r9d,(%rsp)
  mov    %r10d,%r15d
L200:
  lea    0x1(%r15),%eax
  test   %r15d,%r15d
  je     L88
  cmp    $0x2,%eax
  je     L135
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L525:
  lea    0x1(%r12),%eax
  test   %r12d,%r12d
  je     L322
  cmp    $0x2,%eax
  je     L26
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L453:
  lea    0x1(%rbp),%eax
  test   %ebp,%ebp
  je     L230
  cmp    $0x2,%eax
  je     L21
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L268:
  lea    0x1(%rbx),%r13d
  test   %ebx,%ebx
  je     L512
  cmp    $0x2,%r13d
  je     L420
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L432:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  sub    $0x2,%r13d
  mov    %edx,0x28(%rsp)
  call   <fib>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  cmp    $0x1,%r13d
  je     L325
  cmp    $0x2,%r13d
  jne    L432
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L64:
  add    %r15d,%r14d
  cmp    $0x1,%ebx
  je     L266
  cmp    $0x2,%ebx
  jne    L512
L420:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  cmp    $0x1,%ebp
  je     L156
L150:
  cmp    $0x2,%ebp
  jne    L230
L21:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L209:
  add    %ebx,%ecx
  cmp    $0x1,%r12d
  jne    L363
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%r9d
  cmp    $0x1,%r15d
  jne    L137
L271:
  mov    0x20(%rsp),%r15d
  add    %r9d,0x14(%rsp)
  cmp    $0x1,%r15d
  je     L343
L505:
  cmp    $0x2,%r15d
  je     L39
L4:
  sub    $0x2,%r15d
  jmp    L281
L230:
  sub    $0x2,%ebp
  jmp    L453
L363:
  cmp    $0x2,%r12d
  jne    L322
L26:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%r9d
  cmp    $0x1,%r15d
  je     L271
L137:
  cmp    $0x2,%r15d
  je     L482
L88:
  sub    $0x2,%r15d
  jmp    L200
L322:
  sub    $0x2,%r12d
  jmp    L525
L266:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  cmp    $0x1,%ebp
  jne    L150
L156:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L209
  nopl   0x0(%rax,%rax,1)
L325:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L64
L135:
  mov    (%rsp),%r9d
L482:
  mov    0x20(%rsp),%r15d
  add    $0x1,%r9d
  add    %r9d,0x14(%rsp)
  cmp    $0x1,%r15d
  jne    L505
L343:
  mov    0x1c(%rsp),%ecx
  mov    0x14(%rsp),%esi
  add    %esi,0x8(%rsp)
  cmp    $0x1,%ecx
  jne    L128
L443:
  mov    0x18(%rsp),%esi
  mov    0x8(%rsp),%edi
  add    %edi,0x4(%rsp)
  cmp    $0x1,%esi
  jne    L437
L386:
  mov    0x4(%rsp),%edi
  add    %edi,0x10(%rsp)
  cmpl   $0x1,0xc(%rsp)
  je     L503
  cmpl   $0x2,0xc(%rsp)
  je     L98
L146:
  subl   $0x2,0xc(%rsp)
  jmp    L336
  nopl   (%rax)
L512:
  sub    $0x2,%ebx
  jmp    L268
L39:
  mov    0x14(%rsp),%esi
  mov    0x1c(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x8(%rsp)
  cmp    $0x1,%ecx
  je     L443
L128:
  cmp    $0x2,%ecx
  je     L496
L523:
  sub    $0x2,%ecx
  jmp    L245
L496:
  mov    0x18(%rsp),%esi
  addl   $0x1,0x8(%rsp)
  mov    0x8(%rsp),%edi
  add    %edi,0x4(%rsp)
  cmp    $0x1,%esi
  je     L386
L437:
  cmp    $0x2,%esi
  je     L324
L220:
  sub    $0x2,%esi
  jmp    L159
L98:
  mov    0x10(%rsp),%r9d
  add    $0x1,%r9d
L52:
  add    $0x38,%rsp
  mov    %r9d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L324:
  addl   $0x1,0x4(%rsp)
  jmp    L386
L423:
  xor    %r9d,%r9d
L509:
  mov    %r9d,%eax
  ret
L289:
  mov    $0x1,%r9d
  jmp    L509
L503:
  mov    0x10(%rsp),%r9d
  jmp    L52
```

assistant: ```c
int fib(int n) {
  if (n == 1) {
    return 0;
  } else if (n == 2) {
    return 1;
  } else {
    return fib(n - 1) + fib(n - 2);
  }
}
```