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

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L86
  cmp    $0x1,%edi
  je     L86
  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)
L89:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L7
  cmp    $0x1,%eax
  je     L25
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x4(%rsp)
  mov    %r8d,0x14(%rsp)
L274:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L102
  cmp    $0x1,%eax
  je     L452
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L405:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L103
  cmp    $0x1,%eax
  je     L211
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L372:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L418
  cmp    $0x1,%eax
  je     L382
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L90:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L253
  cmp    $0x1,%eax
  je     L70
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L129:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L262
  cmp    $0x1,%eax
  je     L44
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L312:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L235
  cmp    $0x1,%eax
  je     L409
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L346:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L35
  cmp    $0x1,%r13d
  je     L362
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L45:
  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     L173
  cmp    $0x1,%r13d
  jne    L45
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L226:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L95
  cmp    $0x1,%ebx
  jne    L35
L362:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L80
L237:
  cmp    $0x1,%ebp
  jne    L235
L409:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L101:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L188
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L251
L360:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L293
L464:
  cmp    $0x1,%ecx
  je     L382
L418:
  sub    $0x2,%ecx
  jmp    L372
L235:
  sub    $0x2,%ebp
  jmp    L312
L188:
  cmp    $0x1,%r12d
  jne    L262
L44:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L360
L251:
  cmp    $0x1,%r15d
  je     L70
L253:
  sub    $0x2,%r15d
  jmp    L90
L262:
  sub    $0x2,%r12d
  jmp    L129
L95:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L237
L80:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L101
  nopl   (%rax)
L173:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L226
L70:
  mov    (%rsp),%esi
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L464
L293:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L343
L299:
  mov    0x4(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L246
L215:
  mov    0x14(%rsp),%r8d
  jmp    L64
L35:
  sub    $0x2,%ebx
  jmp    L346
L382:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L299
L343:
  cmpl   $0x1,0xc(%rsp)
  je     L211
L103:
  subl   $0x2,0xc(%rsp)
  jmp    L405
L211:
  mov    0x18(%rsp),%ecx
  mov    0x4(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L215
L246:
  cmpl   $0x1,0x4(%rsp)
  je     L452
L102:
  subl   $0x2,0x4(%rsp)
  jmp    L274
L452:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L64:
  mov    0x8(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L241
  cmpl   $0x1,0x8(%rsp)
  jne    L7
L25:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L72:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L7:
  subl   $0x2,0x8(%rsp)
  jmp    L89
L86:
  mov    %r10d,%eax
  ret
L241:
  mov    0x10(%rsp),%r10d
  jmp    L72
```

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