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

```asm
<cleanIgnore>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,%rbx
  mov    %rdx,%r15
  movslq %esi,%rsi
  lea    (%rdi,%rsi,1),%r13
  cmp    %r13,%rdi
  jae    L46
  movl   $0xffffffff,0xc(%rsp)
  mov    $0x1,%r12d
  mov    $0xffffffff,%r14d
  jmp    L104
L158:
  movsbl (%rbx),%edi
  call   <isupper@plt>
  mov    %ebp,%r12d
  test   %rax,%rax
  jne    L89
L187:
  add    $0x1,%rbx
  cmp    %rbx,%r13
  je     L207
L104:
  movsbl (%rbx),%edi
  call   <isspace@plt>
  mov    %eax,%ebp
  test   %eax,%eax
  jne    L193
  test   %r12d,%r12d
  je     L158
  add    $0x1,%r14d
  movslq %r14d,%rax
  mov    %rbx,(%r15,%rax,8)
  jmp    L158
L89:
  movsbl (%rbx),%edi
  call   <tolower@plt>
  mov    %al,(%rbx)
  jmp    L187
L193:
  movzbl (%rbx),%eax
  cmp    $0x20,%al
  je     L161
  cmp    $0x9,%al
  je     L18
  cmp    $0xa,%al
  je     L128
  cmp    $0xd,%al
  jne    L187
L128:
  movb   $0x0,(%rbx)
  lea    0x1(%r14),%eax
  movslq %eax,%rdx
  add    $0x1,%rbx
  mov    %rbx,(%r15,%rdx,8)
  jmp    L11
L161:
  movb   $0x0,(%rbx)
  mov    $0x1,%r12d
  jmp    L187
L18:
  movb   $0x0,(%rbx)
  lea    0x1(%r14),%eax
  mov    %eax,0xc(%rsp)
  mov    $0x1,%r12d
  jmp    L187
L207:
  cmpb   $0x0,-0x1(%rbx)
  jne    L125
  lea    0x1(%r14),%eax
  cmp    0xc(%rsp),%eax
  je     L117
L189:
  movb   $0x20,-0x1(%rbx)
L125:
  lea    0x1(%r14),%r8d
  mov    $0x1,%eax
  mov    $0x20,%edi
  mov    $0x9,%esi
  test   %r14d,%r14d
  jle    L191
L39:
  mov    (%r15,%rax,8),%rdx
  cmp    %eax,0xc(%rsp)
  mov    %esi,%ecx
  cmovne %edi,%ecx
  mov    %cl,-0x1(%rdx)
  add    $0x1,%rax
  cmp    %r8,%rax
  jne    L39
L191:
  mov    %r14d,%eax
  not    %eax
L11:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L117:
  movb   $0x9,-0x1(%rbx)
  jmp    L125
L46:
  mov    $0xffffffff,%r14d
  cmpb   $0x0,-0x1(%rdi)
  jne    L191
  movl   $0xffffffff,0xc(%rsp)
  mov    $0xffffffff,%r14d
  jmp    L189
```

assistant: ```c
int cleanIgnore(char *inbuf, int maxbuf, char **wstarts) {
  char *curpos, *badpos;
  int i, j, prevspace, tab_ndx;
  i = -1;
  prevspace = 1;
  tab_ndx = -1;
  curpos = inbuf;
  badpos = curpos + maxbuf;
  while (curpos < badpos) {
    if (!isspace(*curpos)) {
      if (prevspace) {
        i++;
        wstarts[i] = curpos;
        prevspace = 0;
      }
      if (isupper(*curpos)) {
        *curpos = tolower(*curpos);
      }
    } else if (*curpos == ' ') {
      *curpos = '\0';
      prevspace = 1;
    } else if (*curpos == '\t') {
      *curpos = '\0';
      prevspace = 1;
      tab_ndx = i + 1;
    } else if (*curpos == '\n' || *curpos == '\r') {
      *curpos = '\0';
      i++;
      wstarts[i] = curpos + 1;
      return i;
    }
    curpos++;
  }
  curpos--;
  if (*curpos == '\0') {
    if (tab_ndx != (i + 1)) {
      *curpos = ' ';
    } else {
      *curpos = '\t';
    }
  }
  for (j = 1; j <= i; j++) {
    curpos = wstarts[j];
    curpos--;
    if (j != tab_ndx) {
      *curpos = ' ';
    } else {
      *curpos = '\t';
    }
  }
  return -(i + 1);
}
```