user: 请从给定的汇编指令推导出C源代码：

```asm
<get_unused_lib>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  call   <clear_gset2@plt>
  movl   $0x1,(%rsp)
  lea    0x8(%rsp),%rsi
  lea    0x4(%rsp),%rdi
  mov    $0x0,%eax
  call   <first_Construct@plt>
  lea    0xc(%rsp),%rbx
  cmpl   $0x0,0x4(%rsp)
  jg     L184
L134:
  cmpl   $0x1,(%rsp)
  je     L83
L121:
  mov    (%rsp),%eax
  mov    %eax,0x0(%rbp)
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L71
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  ret
L89:
  lea    0x10(%rsp),%rdi
  mov    0x8(%rsp),%esi
  mov    $0x0,%eax
  call   <val_sees_uses@plt>
  mov    %rsp,%rdi
  mov    0x10(%rsp),%esi
  mov    $0x0,%eax
  call   <union_gset2@plt>
  jmp    L51
L99:
  lea    0x8(%rsp),%rsi
  lea    0x4(%rsp),%rdi
  mov    0x8(%rsp),%ecx
  mov    0x4(%rsp),%edx
  mov    $0x0,%eax
  call   <next_Construct@plt>
  cmpl   $0x0,0x4(%rsp)
  jle    L134
L184:
  cmpl   $0x1,(%rsp)
  jne    L121
  mov    0x8(%rsp),%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <def_sees_uses@plt>
  cmpl   $0x1,0xc(%rsp)
  je     L89
L51:
  cmpl   $0x1,(%rsp)
  jne    L99
  mov    0x8(%rsp),%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <def_inc_ipt@plt>
  cmpl   $0x1,0xc(%rsp)
  jne    L99
  lea    0x10(%rsp),%rdi
  mov    0x8(%rsp),%esi
  mov    $0x0,%eax
  call   <val_inc_ipt@plt>
  mov    %rsp,%rdi
  mov    0x10(%rsp),%esi
  mov    $0x0,%eax
  call   <union_gset2@plt>
  jmp    L99
L83:
  mov    $0x0,%eax
  call   <clear_gset1@plt>
  lea    0x8(%rsp),%rsi
  lea    0x4(%rsp),%rdi
  mov    $0x0,%eax
  call   <first_Construct@plt>
  lea    0x14(%rsp),%rbx
  cmpl   $0x0,0x4(%rsp)
  jg     L109
  jmp    L121
L188:
  lea    0xc(%rsp),%rdi
  mov    0x8(%rsp),%esi
  mov    $0x0,%eax
  call   <member_gset2@plt>
  cmpl   $0x0,0xc(%rsp)
  je     L139
L183:
  lea    0x8(%rsp),%rsi
  lea    0x4(%rsp),%rdi
  mov    0x8(%rsp),%ecx
  mov    0x4(%rsp),%edx
  mov    $0x0,%eax
  call   <next_Construct@plt>
  cmpl   $0x0,0x4(%rsp)
  jle    L121
L109:
  cmpl   $0x1,(%rsp)
  jne    L121
  mov    0x8(%rsp),%esi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <val_type@plt>
  mov    0x14(%rsp),%eax
  cmp    $0x2,%eax
  je     L188
  cmp    $0x9,%eax
  jne    L183
  jmp    L188
L139:
  lea    0xc(%rsp),%rdi
  mov    0x8(%rsp),%esi
  mov    $0x0,%eax
  call   <member_gset1@plt>
  cmpl   $0x0,0xc(%rsp)
  jne    L183
  mov    %rsp,%rdi
  mov    0x8(%rsp),%esi
  mov    $0x0,%eax
  call   <add_gset1@plt>
  jmp    L183
L71:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void get_unused_lib(rep) int *rep;
{
  int rr, loc, cc1, bb, ss, tt;
  clear_gset2();
  rr = 1;
  first_Construct(&loc, &cc1);
  while (loc > 0 && rr == 1) {
    def_sees_uses(&bb, cc1);
    if (bb == 1) {
      val_sees_uses(&ss, cc1);
      union_gset2(&rr, ss);
    }
    if (rr == 1) {
      def_inc_ipt(&bb, cc1);
      if (bb == 1) {
        val_inc_ipt(&ss, cc1);
        union_gset2(&rr, ss);
      }
    }
    next_Construct(&loc, &cc1, loc, cc1);
  }
  if (rr == 1) {
    clear_gset1();
    first_Construct(&loc, &cc1);
    while (loc > 0 && rr == 1) {
      val_type(&tt, cc1);
      if (tt == 2 || tt == 9) {
        member_gset2(&bb, cc1);
        if (bb == 0) {
          member_gset1(&bb, cc1);
          if (bb == 0) {
            add_gset1(&rr, cc1);
          }
        }
      }
      next_Construct(&loc, &cc1, loc, cc1);
    }
  }
  *rep = rr;
}
```