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

```asm
<main>:
  endbr64
  push   %rbp
  mov    $0x1,%edi
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  call   <assert@plt>
  mov    $0x64,%esi
  xor    %edi,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x2,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x3,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x4,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x5,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x7,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x8,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x7,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x9,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0xf,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1f,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x1f,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x20,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x1f,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x21,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x3f,%al
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0xfff,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0xfff,%eax
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1000,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0xfff,%eax
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%esi
  mov    $0x1001,%edi
  call   <memalign@plt>
  xor    %edi,%edi
  test   $0x1fff,%eax
  mov    %rax,(%rsp)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0xffffffff,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  mov    D9(%rip),%rbx
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  mov    $0x64,%edx
  xor    %esi,%esi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  test   %eax,%eax
  jne    L7
  xor    %edi,%edi
  testb  $0x7,(%rsp)
  sete   %dil
L7:
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0x1,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0x2,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0x3,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  mov    $0x64,%edx
  mov    $0x8,%esi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  test   %eax,%eax
  jne    L26
  xor    %edi,%edi
  testb  $0x7,(%rsp)
  sete   %dil
L26:
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0x1f,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  mov    $0x64,%edx
  mov    $0x20,%esi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  test   %eax,%eax
  jne    L20
  xor    %edi,%edi
  testb  $0x1f,(%rsp)
  sete   %dil
L20:
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0x21,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    $0x64,%edx
  mov    $0xfff,%esi
  mov    %rbp,%rdi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    %rbp,%rdi
  mov    $0x64,%edx
  mov    $0x1000,%esi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  test   %eax,%eax
  jne    L12
  xor    %edi,%edi
  testw  $0xfff,(%rsp)
  sete   %dil
L12:
  call   <assert@plt>
  mov    %rbp,%rdi
  mov    $0x64,%edx
  mov    $0x1001,%esi
  call   <posix_memalign@plt>
  xor    %edi,%edi
  cmp    %eax,(%rbx)
  sete   %dil
  call   <assert@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L16
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  ret
L16:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main(void) {
  int *p;
  int res;
  assert(sizeof(long int) == sizeof(void *));
  p = memalign(0, 100);
  assert(0 == (long)p % 8);
  p = memalign(1, 100);
  assert(0 == (long)p % 8);
  p = memalign(2, 100);
  assert(0 == (long)p % 8);
  p = memalign(3, 100);
  assert(0 == (long)p % 8);
  p = memalign(4, 100);
  assert(0 == (long)p % 8);
  p = memalign(5, 100);
  assert(0 == (long)p % 8);
  p = memalign(7, 100);
  assert(0 == (long)p % 8);
  p = memalign(8, 100);
  assert(0 == (long)p % 8);
  p = memalign(9, 100);
  assert(0 == (long)p % 16);
  p = memalign(31, 100);
  assert(0 == (long)p % 32);
  p = memalign(32, 100);
  assert(0 == (long)p % 32);
  p = memalign(33, 100);
  assert(0 == (long)p % 64);
  p = memalign(4095, 100);
  assert(0 == (long)p % 4096);
  p = memalign(4096, 100);
  assert(0 == (long)p % 4096);
  p = memalign(4097, 100);
  assert(0 == (long)p % 8192);
  res = posix_memalign((void **)&p, -1, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 0, 100);
  assert(0 == res && 0 == (long)p % 8);
  res = posix_memalign((void **)&p, 1, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 2, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 3, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, sizeof(void *), 100);
  assert(0 == res && 0 == (long)p % sizeof(void *));
  res = posix_memalign((void **)&p, 31, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 32, 100);
  assert(0 == res && 0 == (long)p % 32);
  res = posix_memalign((void **)&p, 33, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 4095, 100);
  assert(EINVAL == res);
  res = posix_memalign((void **)&p, 4096, 100);
  assert(0 == res && 0 == (long)p % 4096);
  res = posix_memalign((void **)&p, 4097, 100);
  assert(EINVAL == res);
  return 0;
}
```