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

```asm
<fib>:
  endbr64
  mov    %edi,%r10d
  test   %edi,%edi
  je     L167
  cmp    $0x1,%edi
  je     L167
  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)
L190:
  mov    0x8(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L522
  cmp    $0x1,%eax
  je     L303
  lea    -0x1(%rdi),%eax
  xor    %r8d,%r8d
  mov    %eax,0x4(%rsp)
  mov    %r8d,0x14(%rsp)
L392:
  mov    0x4(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L446
  cmp    $0x1,%eax
  je     L119
  lea    -0x1(%rdi),%eax
  xor    %ecx,%ecx
  mov    %eax,0xc(%rsp)
  mov    %ecx,0x18(%rsp)
L386:
  mov    0xc(%rsp),%edi
  mov    %edi,%eax
  add    $0x1,%eax
  je     L307
  cmp    $0x1,%eax
  je     L322
  xor    %ecx,%ecx
  lea    -0x1(%rdi),%r8d
  mov    %ecx,0x1c(%rsp)
  mov    %r8d,%ecx
L57:
  mov    %ecx,%eax
  add    $0x1,%eax
  je     L515
  cmp    $0x1,%eax
  je     L378
  xor    %esi,%esi
  mov    %ecx,0x20(%rsp)
  lea    -0x1(%rcx),%r9d
  mov    %esi,(%rsp)
  mov    %r9d,%r15d
L419:
  mov    %r15d,%eax
  add    $0x1,%eax
  je     L423
  cmp    $0x1,%eax
  je     L521
  lea    -0x1(%r15),%r12d
  xor    %ecx,%ecx
  mov    %r15d,%esi
L159:
  mov    %r12d,%eax
  add    $0x1,%eax
  je     L128
  cmp    $0x1,%eax
  je     L408
  xor    %ebx,%ebx
  lea    -0x1(%r12),%ebp
  mov    %r12d,%edx
  mov    %ebx,%r12d
L248:
  mov    %ebp,%eax
  add    $0x1,%eax
  je     L34
  cmp    $0x1,%eax
  je     L459
  mov    %ebp,%eax
  lea    -0x1(%rbp),%ebx
  xor    %r14d,%r14d
  mov    %ecx,%ebp
  mov    %eax,%ecx
L401:
  mov    %ebx,%r13d
  add    $0x1,%r13d
  je     L476
  cmp    $0x1,%r13d
  je     L3
  mov    %ebx,0x24(%rsp)
  xor    %r15d,%r15d
  mov    %esi,%ebx
L258:
  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     L1
  cmp    $0x1,%r13d
  jne    L258
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  add    $0x1,%r15d
L418:
  add    %r15d,%r14d
  test   %ebx,%ebx
  je     L66
  cmp    $0x1,%ebx
  jne    L476
L3:
  mov    %ecx,%eax
  add    $0x1,%r14d
  mov    %ebp,%ecx
  mov    %eax,%ebp
  add    %r14d,%r12d
  test   %ebp,%ebp
  je     L125
L246:
  cmp    $0x1,%ebp
  jne    L34
L459:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  add    $0x1,%ebx
L209:
  add    %ebx,%ecx
  test   %r12d,%r12d
  jne    L81
  mov    %esi,%r15d
  mov    %ecx,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  jne    L150
L304:
  mov    0x20(%rsp),%ecx
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  je     L11
L115:
  cmp    $0x1,%ecx
  je     L378
L515:
  sub    $0x2,%ecx
  jmp    L57
L34:
  sub    $0x2,%ebp
  jmp    L248
L81:
  cmp    $0x1,%r12d
  jne    L128
L408:
  mov    %ecx,%r14d
  mov    %esi,%r15d
  add    $0x1,%r14d
  add    %r14d,(%rsp)
  mov    (%rsp),%esi
  test   %r15d,%r15d
  je     L304
L150:
  cmp    $0x1,%r15d
  je     L521
L423:
  sub    $0x2,%r15d
  jmp    L419
L128:
  sub    $0x2,%r12d
  jmp    L159
L66:
  mov    %ecx,%eax
  mov    %ebp,%ecx
  add    %r14d,%r12d
  mov    %eax,%ebp
  test   %ebp,%ebp
  jne    L246
L125:
  mov    %r12d,%ebx
  mov    %edx,%r12d
  jmp    L209
  nopl   (%rax)
L1:
  mov    %ebx,%esi
  mov    0x24(%rsp),%ebx
  jmp    L418
L521:
  mov    (%rsp),%esi
  mov    0x20(%rsp),%ecx
  add    $0x1,%esi
  add    %esi,0x1c(%rsp)
  test   %ecx,%ecx
  jne    L115
L11:
  mov    0x1c(%rsp),%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  jne    L481
L227:
  mov    0x4(%rsp),%edx
  mov    0x18(%rsp),%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  jne    L468
L171:
  mov    0x14(%rsp),%r8d
  jmp    L146
L476:
  sub    $0x2,%ebx
  jmp    L401
L378:
  mov    0x1c(%rsp),%ecx
  add    $0x1,%ecx
  add    %ecx,0x18(%rsp)
  mov    0xc(%rsp),%ecx
  test   %ecx,%ecx
  je     L227
L481:
  cmpl   $0x1,0xc(%rsp)
  je     L322
L307:
  subl   $0x2,0xc(%rsp)
  jmp    L386
L322:
  mov    0x18(%rsp),%ecx
  mov    0x4(%rsp),%edx
  add    $0x1,%ecx
  add    %ecx,0x14(%rsp)
  test   %edx,%edx
  je     L171
L468:
  cmpl   $0x1,0x4(%rsp)
  je     L119
L446:
  subl   $0x2,0x4(%rsp)
  jmp    L392
L119:
  mov    0x14(%rsp),%r8d
  add    $0x1,%r8d
L146:
  mov    0x8(%rsp),%eax
  add    %r8d,0x10(%rsp)
  test   %eax,%eax
  je     L492
  cmpl   $0x1,0x8(%rsp)
  jne    L522
L303:
  mov    0x10(%rsp),%r10d
  add    $0x1,%r10d
L497:
  add    $0x38,%rsp
  mov    %r10d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L522:
  subl   $0x2,0x8(%rsp)
  jmp    L190
L167:
  mov    %r10d,%eax
  ret
L492:
  mov    0x10(%rsp),%r10d
  jmp    L497
```

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