user: 请从给定的汇编指令推导出C源代码:

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rdi,%r8
  mov    %rsp,%rbp
  push   %r15
  mov    %ecx,%r15d
  push   %r14
  sub    %edx,%r15d
  push   %r13
  movslq %esi,%r13
  push   %r12
  push   %rbx
  mov    %edx,%ebx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  mov    %edx,%eax
  mov    %rsp,%rsi
  sub    %r13d,%eax
  lea    0x1(%rax),%ecx
  mov    %eax,-0x48(%rbp)
  movslq %ecx,%rax
  lea    0xf(,%rax,4),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L95
L176:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L176
L95:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L36
L74:
  movslq %r15d,%r12
  mov    %rsp,%rsi
  mov    %rsp,%r10
  lea    0xf(,%r12,4),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L14
L64:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L64
L14:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L47
L105:
  mov    %rsp,%r14
  test   %ecx,%ecx
  jle    L57
  mov    -0x48(%rbp),%eax
  mov    %r10,%rdi
  mov    %ecx,-0x58(%rbp)
  mov    %r8,-0x50(%rbp)
  lea    0x4(,%rax,4),%rdx
  movslq %r13d,%rax
  lea    (%r8,%rax,4),%rsi
  call   <memcpy@plt>
  test   %r15d,%r15d
  mov    -0x50(%rbp),%r8
  mov    -0x58(%rbp),%ecx
  mov    %rax,%r10
  jle    L158
  add    $0x1,%ebx
  mov    %r14,%rdi
  add    $0x1,%r13d
  mov    %ecx,-0x5c(%rbp)
  movslq %ebx,%rbx
  lea    0x0(,%r12,4),%rdx
  mov    %r8,-0x50(%rbp)
  xor    %r12d,%r12d
  lea    (%r8,%rbx,4),%rsi
  mov    %rax,-0x58(%rbp)
  xor    %ebx,%ebx
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r8
  mov    -0x58(%rbp),%r10
  movslq %r13d,%rax
  mov    -0x5c(%rbp),%ecx
  jmp    L197
  nop
L15:
  add    $0x1,%r12d
L141:
  mov    %edx,-0x4(%r8,%rax,4)
  movslq %eax,%r13
  add    $0x1,%rax
  cmp    %ecx,%r12d
  jge    L61
  cmp    %r15d,%ebx
  jge    L61
L197:
  movslq %r12d,%rdx
  movslq %ebx,%rsi
  mov    (%r10,%rdx,4),%edx
  mov    (%r14,%rsi,4),%esi
  cmp    %esi,%edx
  jle    L15
  add    $0x1,%ebx
  mov    %esi,%edx
  jmp    L141
  nopl   0x0(%rax,%rax,1)
L36:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L74
  nopl   0x0(%rax,%rax,1)
L158:
  xor    %ebx,%ebx
  xor    %r12d,%r12d
  nopl   (%rax)
L61:
  cmp    %r12d,%ecx
  mov    %ecx,-0x50(%rbp)
  jle    L91
  movslq %r13d,%rax
  mov    %r8,-0x58(%rbp)
  lea    (%r8,%rax,4),%rdi
  mov    -0x48(%rbp),%eax
  sub    %r12d,%eax
  lea    0x4(,%rax,4),%rdx
  movslq %r12d,%rax
  lea    (%r10,%rax,4),%rsi
  call   <memcpy@plt>
  mov    -0x50(%rbp),%ecx
  mov    -0x58(%rbp),%r8
  add    %r13d,%ecx
  sub    %r12d,%ecx
  movslq %ecx,%r13
L91:
  cmp    %ebx,%r15d
  jle    L77
L86:
  sub    $0x1,%r15d
  lea    (%r8,%r13,4),%rdi
  sub    %ebx,%r15d
  movslq %ebx,%rbx
  lea    0x4(,%r15,4),%rdx
  lea    (%r14,%rbx,4),%rsi
  call   <memcpy@plt>
L77:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L35
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L57:
  test   %r15d,%r15d
  jle    L158
  add    $0x1,%ebx
  lea    0x0(,%r12,4),%rdx
  mov    %r14,%rdi
  mov    %r8,-0x48(%rbp)
  movslq %ebx,%rbx
  lea    (%r8,%rbx,4),%rsi
  xor    %ebx,%ebx
  call   <memcpy@plt>
  mov    -0x48(%rbp),%r8
  jmp    L86
L47:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L105
L35:
  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], R[n2];
  for (i = 0; i < n1; i++)
    L[i] = arr[l + i];
  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++;
  }
}
```