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

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L122
  cmp    $0x1,%edi
  je     L122
  push   %r15
  lea    -0x2(%rdi),%eax
  xor    %r10d,%r10d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %eax,0x4(%rsp)
  mov    %r10d,0x10(%rsp)
L236:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L195
  cmp    $0x1,%eax
  je     L5
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x8(%rsp)
  mov    %r8d,0x14(%rsp)
L114:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L434
  cmp    $0x1,%eax
  je     L292
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L331:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L39
  cmp    $0x1,%eax
  je     L249
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L421:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L43
  cmp    $0x1,%eax
  je     L42
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L366:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L441
  cmp    $0x1,%eax
  je     L247
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L170:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L225
  cmp    $0x1,%eax
  je     L399
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L528:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L129
  cmp    $0x1,%eax
  je     L372
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L506:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L412
  cmp    $0x1,%r13d
  je     L367
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L446:
  lea    -0x1(%r13),%edi
  mov    %ecx,0x2c(%rsp)
  mov    %edx,0x28(%rsp)
  call   <fib>
  mov    0x28(%rsp),%edx
  mov    0x2c(%rsp),%ecx
  add    %eax,%r15d
  sub    $0x2,%r13d
  je     L283
  cmp    $0x1,%r13d
  jne    L446
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L28:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L52
  cmp    $0x1,%ebx
  jne    L412
L367:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L393
L345:
  cmp    $0x1,%ebp
  jne    L129
L372:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L526:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L503
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L78
L255:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L320
L226:
  cmp    $0x1,%ecx
  je     L42
L43:
  sub    $0x2,%ecx
  jmp    L421
L129:
  sub    $0x2,%ebp
  jmp    L528
L503:
  cmp    $0x1,%r12d
  jne    L225
L399:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L255
L78:
  cmp    $0x1,%r15d
  je     L146
L441:
  sub    $0x2,%r15d
  jmp    L366
L225:
  sub    $0x2,%r12d
  jmp    L170
L52:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L345
L393:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L526
  nopl   (%rax)
L283:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L28
L247:
  mov    (%rsp),%esi
L146:
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L226
L320:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L88
L262:
  mov    0x8(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L369
L311:
  mov    0x14(%rsp),%r8d
  jmp    L344
L412:
  sub    $0x2,%ebx
  jmp    L506
L42:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L262
L88:
  cmpl   $0x1,0xc(%rsp)
  je     L249
L39:
  subl   $0x2,0xc(%rsp)
  jmp    L331
L249:
  mov    0x18(%rsp),%ecx
  mov    0x8(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L311
L369:
  cmpl   $0x1,0x8(%rsp)
  je     L292
L434:
  subl   $0x2,0x8(%rsp)
  jmp    L114
L292:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L344:
  mov    0x4(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L214
  cmpl   $0x1,0x4(%rsp)
  jne    L195
L5:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L426:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L195:
  subl   $0x2,0x4(%rsp)
  jmp    L236
L122:
  mov    %r10d,%eax
  ret
L214:
  mov    0x10(%rsp),%r10d
  jmp    L426
```

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