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

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L479
  cmp    $0x1,%edi
  je     L479
  push   %r15
  lea    -0x2(%rdi),%eax
  xor    %r10d,%r10d
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %eax,0x8(%rsp)
  mov    %r10d,0x10(%rsp)
L300:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L31
  cmp    $0x1,%eax
  je     L311
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x4(%rsp)
  mov    %r8d,0x14(%rsp)
L158:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L195
  cmp    $0x1,%eax
  je     L431
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L352:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L144
  cmp    $0x1,%eax
  je     L301
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L396:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L190
  cmp    $0x1,%eax
  je     L238
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L407:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L56
  cmp    $0x1,%eax
  je     L128
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L316:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L478
  cmp    $0x1,%eax
  je     L168
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L346:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L362
  cmp    $0x1,%eax
  je     L483
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L325:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L65
  cmp    $0x1,%r13d
  je     L130
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L488:
  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     L411
  cmp    $0x1,%r13d
  jne    L488
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L189:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L466
  cmp    $0x1,%ebx
  jne    L65
L130:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L363
L133:
  cmp    $0x1,%ebp
  jne    L362
L483:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L475:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L239
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L272
L167:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L44
L131:
  cmp    $0x1,%ecx
  je     L238
L190:
  sub    $0x2,%ecx
  jmp    L396
L362:
  sub    $0x2,%ebp
  jmp    L346
L239:
  cmp    $0x1,%r12d
  jne    L478
L168:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L167
L272:
  cmp    $0x1,%r15d
  je     L128
L56:
  sub    $0x2,%r15d
  jmp    L407
L478:
  sub    $0x2,%r12d
  jmp    L316
L466:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L133
L363:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L475
  nopl   (%rax)
L411:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L189
L128:
  mov    (%rsp),%esi
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L131
L44:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L343
L441:
  mov    0x4(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L246
L81:
  mov    0x14(%rsp),%r8d
  jmp    L463
L65:
  sub    $0x2,%ebx
  jmp    L325
L238:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L441
L343:
  cmpl   $0x1,0xc(%rsp)
  je     L301
L144:
  subl   $0x2,0xc(%rsp)
  jmp    L352
L301:
  mov    0x18(%rsp),%ecx
  mov    0x4(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L81
L246:
  cmpl   $0x1,0x4(%rsp)
  je     L431
L195:
  subl   $0x2,0x4(%rsp)
  jmp    L158
L431:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L463:
  mov    0x8(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L109
  cmpl   $0x1,0x8(%rsp)
  jne    L31
L311:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L510:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L31:
  subl   $0x2,0x8(%rsp)
  jmp    L300
L479:
  mov    %r10d,%eax
  ret
L109:
  mov    0x10(%rsp),%r10d
  jmp    L510
```

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