user: 这段汇编代码用C语言表示是什么样的？

```asm
<merge>:
  endbr64
  push   %rbp
  sub    %edx,%ecx
  mov    %rsp,%rbp
  push   %r15
  mov    %rdi,%r15
  push   %r14
  mov    %edx,%r14d
  push   %r13
  mov    %ecx,%r13d
  push   %r12
  movslq %esi,%r12
  push   %rbx
  sub    %r12d,%r14d
  mov    %edx,%ebx
  lea    0x1(%r14),%r9d
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  movslq %r9d,%rax
  mov    %rsp,%rcx
  lea    0xf(,%rax,4),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L251
L141:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L141
L251:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L212
L233:
  mov    %rsp,%r8
  test   %r9d,%r9d
  jle    L36
  mov    %r14d,%eax
  mov    %r8,%rdi
  mov    %r9d,-0x48(%rbp)
  lea    0x4(,%rax,4),%rdx
  movslq %r12d,%rax
  lea    (%r15,%rax,4),%rsi
  call   <memcpy@plt>
  movslq %r13d,%rdx
  mov    %rsp,%rsi
  mov    -0x48(%rbp),%r9d
  mov    %rax,%r8
  lea    0xf(,%rdx,4),%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rcx
  cmp    %rsi,%rsp
  je     L235
L131:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L131
L235:
  and    $0xfff,%ecx
  sub    %rcx,%rsp
  test   %rcx,%rcx
  jne    L121
L155:
  mov    %rsp,%rdi
  mov    %rdi,-0x48(%rbp)
  test   %r13d,%r13d
  jle    L218
  add    $0x1,%ebx
  shl    $0x2,%rdx
  mov    %r9d,-0x54(%rbp)
  add    $0x1,%r12d
  movslq %ebx,%rbx
  mov    %r8,-0x50(%rbp)
  lea    (%r15,%rbx,4),%rsi
  xor    %ebx,%ebx
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r8
  mov    -0x54(%rbp),%r9d
  xor    %edx,%edx
  mov    %rax,%rdi
  xor    %ecx,%ecx
  movslq %r12d,%rax
  xor    %r11d,%r11d
  cs nopw 0x0(%rax,%rax,1)
L267:
  mov    (%r8,%rcx,4),%esi
  mov    (%rdi,%r11,4),%r12d
  cmp    %r12d,%esi
  jg     L59
L82:
  mov    %esi,-0x4(%r15,%rax,4)
  movslq %eax,%r12
  lea    0x1(%rdx),%ecx
  add    $0x1,%rax
  cmp    %edx,%r14d
  jle    L71
  cmp    %ebx,%r13d
  jle    L71
  movslq %ecx,%rcx
  mov    (%rdi,%r11,4),%r12d
  mov    (%r8,%rcx,4),%esi
  mov    %rcx,%rdx
  cmp    %r12d,%esi
  jle    L82
L59:
  add    $0x1,%ebx
  mov    %r12d,-0x4(%r15,%rax,4)
  movslq %eax,%r12
  add    $0x1,%rax
  cmp    %ebx,%r13d
  jle    L99
  cmp    %edx,%r9d
  jle    L99
  movslq %ebx,%r11
  jmp    L267
  nopw   0x0(%rax,%rax,1)
L99:
  mov    %edx,%ecx
L71:
  cmp    %ecx,%r9d
  mov    %r9d,-0x50(%rbp)
  jle    L40
  movslq %r12d,%rax
  mov    %r14d,%r10d
  mov    %ecx,-0x54(%rbp)
  sub    %ecx,%r10d
  lea    (%r15,%rax,4),%rdi
  movslq %ecx,%rax
  lea    0x4(,%r10,4),%rdx
  lea    (%r8,%rax,4),%rsi
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r9d
  mov    -0x54(%rbp),%ecx
  add    %r12d,%r9d
  sub    %ecx,%r9d
  movslq %r9d,%r12
L40:
  cmp    %ebx,%r13d
  jle    L216
L176:
  mov    -0x48(%rbp),%rax
  sub    $0x1,%r13d
  lea    (%r15,%r12,4),%rdi
  sub    %ebx,%r13d
  movslq %ebx,%rbx
  lea    0x4(,%r13,4),%rdx
  lea    (%rax,%rbx,4),%rsi
  call   <memcpy@plt>
L216:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L91
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L36:
  movslq %r13d,%rdx
  mov    %rsp,%rsi
  lea    0xf(,%rdx,4),%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rcx
  cmp    %rsi,%rsp
  je     L67
L229:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L229
L67:
  and    $0xfff,%ecx
  sub    %rcx,%rsp
  test   %rcx,%rcx
  jne    L63
L47:
  mov    %rsp,-0x48(%rbp)
  test   %r13d,%r13d
  jle    L218
  add    $0x1,%ebx
  mov    %rsp,%rdi
  shl    $0x2,%rdx
  movslq %ebx,%rbx
  lea    (%r15,%rbx,4),%rsi
  xor    %ebx,%ebx
  call   <memcpy@plt>
  jmp    L176
  nopl   (%rax)
L212:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L233
  nopl   0x0(%rax,%rax,1)
L63:
  orq    $0x0,-0x8(%rsp,%rcx,1)
  jmp    L47
L121:
  orq    $0x0,-0x8(%rsp,%rcx,1)
  jmp    L155
L218:
  xor    %ebx,%ebx
  xor    %ecx,%ecx
  jmp    L71
L91:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void merge(int arr[], int l, int m, int r) {
  int i, j, k;
  int n1 = m - l + 1;
  int n2 = r - m;
  int L[n1];
  for (i = 0; i < n1; i++) {
    L[i] = arr[l + i];
  }
  int R[n2];
  for (j = 0; j < n2; j++) {
    R[j] = arr[m + 1 + j];
  }
  i = 0;
  j = 0;
  k = l;
  while (i < n1 && j < n2) {
    if (L[i] <= R[j]) {
      arr[k] = L[i];
      i++;
    } else {
      arr[k] = R[j];
      j++;
    }
    k++;
  }
  while (i < n1) {
    arr[k] = L[i];
    i++;
    k++;
  }
  while (j < n2) {
    arr[k] = R[j];
    j++;
    k++;
  }
}
```