user: 下面的汇编指令对应的C源代码是什么：

```asm
<merge_sort>:
  endbr64
  cmp    $0x1,%esi
  jle    L276
  push   %r15
  push   %r14
  push   %r13
  mov    %esi,%r13d
  push   %r12
  sar    %r13d
  mov    %rdi,%r12
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  sub    $0x48,%rsp
  cmp    $0x1,%r13d
  je     L304
  mov    %esi,%r14d
  sar    $0x2,%r14d
  cmp    $0x1,%r14d
  je     L204
  mov    %esi,%r15d
  sar    $0x3,%r15d
  cmp    $0x1,%r15d
  je     L259
  mov    %esi,%ebx
  sar    $0x4,%ebx
  cmp    $0x1,%ebx
  je     L300
  mov    %esi,%edx
  sar    $0x5,%edx
  mov    %edx,%esi
  mov    %edx,0x8(%rsp)
  call   <merge_sort>
  movslq 0x8(%rsp),%rax
  mov    %ebx,%esi
  sub    %eax,%esi
  lea    (%r12,%rax,4),%rdi
  call   <merge_sort>
  mov    0x8(%rsp),%edx
  mov    %ebx,%esi
  mov    %r12,%rdi
  call   <merge@plt>
L300:
  mov    %r15d,%r8d
  sub    %ebx,%r8d
  cmp    $0x1,%r8d
  jle    L95
  movslq %ebx,%rax
  mov    %r8d,%edx
  mov    %r8d,0x1c(%rsp)
  lea    (%r12,%rax,4),%r9
  sar    %edx
  mov    %edx,%esi
  mov    %r9,%rdi
  mov    %edx,0x10(%rsp)
  mov    %r9,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%r9
  sub    %eax,%esi
  lea    (%r9,%rax,4),%rdi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
L95:
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r12,%rdi
  call   <merge@plt>
L259:
  mov    %r14d,%ebx
  sub    %r15d,%ebx
  cmp    $0x1,%ebx
  jle    L151
  mov    %ebx,%r8d
  movslq %r15d,%rax
  sar    %r8d
  lea    (%r12,%rax,4),%r9
  cmp    $0x1,%r8d
  je     L37
  mov    %ebx,%edx
  mov    %r9,%rdi
  mov    %r8d,0x1c(%rsp)
  sar    $0x2,%edx
  mov    %r9,0x8(%rsp)
  mov    %edx,%esi
  mov    %edx,0x10(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r9
  mov    0x1c(%rsp),%esi
  lea    (%r9,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x1c(%rsp),%r8d
  mov    0x10(%rsp),%edx
  mov    0x8(%rsp),%rdi
  mov    %r8d,%esi
  mov    %r8d,0x10(%rsp)
  call   <merge@plt>
  mov    0x10(%rsp),%r8d
  mov    0x8(%rsp),%r9
L37:
  mov    %ebx,%r10d
  sub    %r8d,%r10d
  cmp    $0x1,%r10d
  jle    L284
  movslq %r8d,%rax
  mov    %r10d,%edx
  mov    %r8d,0x28(%rsp)
  lea    (%r9,%rax,4),%r11
  sar    %edx
  mov    %r9,0x20(%rsp)
  mov    %edx,%esi
  mov    %r11,%rdi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %r11,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r11
  mov    0x1c(%rsp),%esi
  lea    (%r11,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
  mov    0x28(%rsp),%r8d
  mov    0x20(%rsp),%r9
L284:
  mov    %r8d,%edx
  mov    %ebx,%esi
  mov    %r9,%rdi
  call   <merge@plt>
L151:
  mov    %r15d,%edx
  mov    %r14d,%esi
  mov    %r12,%rdi
  call   <merge@plt>
L204:
  mov    %r13d,%r15d
  sub    %r14d,%r15d
  cmp    $0x1,%r15d
  jle    L132
  mov    %r15d,%r8d
  movslq %r14d,%rax
  sar    %r8d
  lea    (%r12,%rax,4),%rbx
  cmp    $0x1,%r8d
  je     L131
  mov    %r15d,%r9d
  sar    $0x2,%r9d
  cmp    $0x1,%r9d
  je     L267
  mov    %r15d,%edx
  mov    %rbx,%rdi
  mov    %r8d,0x1c(%rsp)
  sar    $0x3,%edx
  mov    %r9d,0x10(%rsp)
  mov    %edx,%esi
  mov    %edx,0x8(%rsp)
  call   <merge_sort>
  movslq 0x8(%rsp),%rax
  mov    0x10(%rsp),%esi
  lea    (%rbx,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x10(%rsp),%r9d
  mov    0x8(%rsp),%edx
  mov    %rbx,%rdi
  mov    %r9d,%esi
  mov    %r9d,0x8(%rsp)
  call   <merge@plt>
  mov    0x1c(%rsp),%r8d
  mov    0x8(%rsp),%r9d
L267:
  mov    %r8d,%r10d
  sub    %r9d,%r10d
  cmp    $0x1,%r10d
  jle    L143
  movslq %r9d,%rax
  mov    %r10d,%edx
  mov    %r8d,0x28(%rsp)
  lea    (%rbx,%rax,4),%r11
  sar    %edx
  mov    %r9d,0x20(%rsp)
  mov    %edx,%esi
  mov    %r11,%rdi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %r11,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r11
  mov    0x1c(%rsp),%esi
  lea    (%r11,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
  mov    0x28(%rsp),%r8d
  mov    0x20(%rsp),%r9d
L143:
  mov    %r8d,%esi
  mov    %r9d,%edx
  mov    %rbx,%rdi
  mov    %r8d,0x8(%rsp)
  call   <merge@plt>
  mov    0x8(%rsp),%r8d
L131:
  mov    %r15d,%r9d
  sub    %r8d,%r9d
  cmp    $0x1,%r9d
  jle    L161
  mov    %r9d,%r10d
  movslq %r8d,%rax
  sar    %r10d
  lea    (%rbx,%rax,4),%r11
  cmp    $0x1,%r10d
  je     L273
  mov    %r9d,%edx
  mov    %r11,%rdi
  mov    %r8d,0x28(%rsp)
  sar    $0x2,%edx
  mov    %r9d,0x20(%rsp)
  mov    %edx,%esi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %r11,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r11
  mov    0x1c(%rsp),%esi
  lea    (%r11,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x1c(%rsp),%r10d
  mov    0x10(%rsp),%edx
  mov    0x8(%rsp),%rdi
  mov    %r10d,%esi
  mov    %r10d,0x10(%rsp)
  call   <merge@plt>
  mov    0x28(%rsp),%r8d
  mov    0x20(%rsp),%r9d
  mov    0x10(%rsp),%r10d
  mov    0x8(%rsp),%r11
L273:
  mov    %r9d,%eax
  sub    %r10d,%eax
  cmp    $0x1,%eax
  jle    L150
  movslq %r10d,%rdx
  mov    %r9d,0x34(%rsp)
  lea    (%r11,%rdx,4),%rcx
  mov    %eax,%edx
  mov    %r8d,0x30(%rsp)
  sar    %edx
  mov    %rcx,%rdi
  mov    %r10d,0x28(%rsp)
  mov    %edx,%esi
  mov    %r11,0x20(%rsp)
  mov    %eax,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %rcx,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rdi
  mov    0x8(%rsp),%rcx
  mov    0x1c(%rsp),%esi
  sub    %edi,%esi
  lea    (%rcx,%rdi,4),%rdi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
  mov    0x34(%rsp),%r9d
  mov    0x30(%rsp),%r8d
  mov    0x28(%rsp),%r10d
  mov    0x20(%rsp),%r11
L150:
  mov    %r10d,%edx
  mov    %r9d,%esi
  mov    %r11,%rdi
  mov    %r8d,0x8(%rsp)
  call   <merge@plt>
  mov    0x8(%rsp),%r8d
L161:
  mov    %r8d,%edx
  mov    %r15d,%esi
  mov    %rbx,%rdi
  call   <merge@plt>
L132:
  mov    %r14d,%edx
  mov    %r13d,%esi
  mov    %r12,%rdi
  call   <merge@plt>
L304:
  mov    %ebp,%r14d
  sub    %r13d,%r14d
  cmp    $0x1,%r14d
  jle    L59
  mov    %r14d,%r15d
  movslq %r13d,%rax
  sar    %r15d
  lea    (%r12,%rax,4),%rbx
  cmp    $0x1,%r15d
  je     L142
  mov    %r14d,%r8d
  sar    $0x2,%r8d
  cmp    $0x1,%r8d
  je     L189
  mov    %r14d,%r9d
  sar    $0x3,%r9d
  cmp    $0x1,%r9d
  je     L194
  mov    %r14d,%edx
  mov    %rbx,%rdi
  mov    %r8d,0x1c(%rsp)
  sar    $0x4,%edx
  mov    %r9d,0x10(%rsp)
  mov    %edx,%esi
  mov    %edx,0x8(%rsp)
  call   <merge_sort>
  movslq 0x8(%rsp),%rax
  mov    0x10(%rsp),%esi
  lea    (%rbx,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x10(%rsp),%r9d
  mov    0x8(%rsp),%edx
  mov    %rbx,%rdi
  mov    %r9d,%esi
  mov    %r9d,0x8(%rsp)
  call   <merge@plt>
  mov    0x1c(%rsp),%r8d
  mov    0x8(%rsp),%r9d
L194:
  mov    %r8d,%r10d
  sub    %r9d,%r10d
  cmp    $0x1,%r10d
  jle    L42
  movslq %r9d,%rax
  mov    %r10d,%edx
  mov    %r8d,0x28(%rsp)
  lea    (%rbx,%rax,4),%r11
  sar    %edx
  mov    %r9d,0x20(%rsp)
  mov    %edx,%esi
  mov    %r11,%rdi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %r11,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r11
  mov    0x1c(%rsp),%esi
  lea    (%r11,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
  mov    0x28(%rsp),%r8d
  mov    0x20(%rsp),%r9d
L42:
  mov    %r8d,%esi
  mov    %r9d,%edx
  mov    %rbx,%rdi
  mov    %r8d,0x8(%rsp)
  call   <merge@plt>
  mov    0x8(%rsp),%r8d
L189:
  mov    %r15d,%r9d
  sub    %r8d,%r9d
  cmp    $0x1,%r9d
  jle    L64
  mov    %r9d,%r10d
  movslq %r8d,%rax
  sar    %r10d
  lea    (%rbx,%rax,4),%r11
  cmp    $0x1,%r10d
  je     L169
  mov    %r9d,%edx
  mov    %r11,%rdi
  mov    %r8d,0x28(%rsp)
  sar    $0x2,%edx
  mov    %r9d,0x20(%rsp)
  mov    %edx,%esi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %r11,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%r11
  mov    0x1c(%rsp),%esi
  lea    (%r11,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x1c(%rsp),%r10d
  mov    0x10(%rsp),%edx
  mov    0x8(%rsp),%rdi
  mov    %r10d,%esi
  mov    %r10d,0x10(%rsp)
  call   <merge@plt>
  mov    0x28(%rsp),%r8d
  mov    0x20(%rsp),%r9d
  mov    0x10(%rsp),%r10d
  mov    0x8(%rsp),%r11
L169:
  mov    %r9d,%eax
  sub    %r10d,%eax
  cmp    $0x1,%eax
  jle    L68
  movslq %r10d,%rdx
  mov    %r9d,0x34(%rsp)
  lea    (%r11,%rdx,4),%rcx
  mov    %eax,%edx
  mov    %r8d,0x30(%rsp)
  sar    %edx
  mov    %rcx,%rdi
  mov    %r10d,0x28(%rsp)
  mov    %edx,%esi
  mov    %r11,0x20(%rsp)
  mov    %eax,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  mov    %rcx,0x8(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rdi
  mov    0x8(%rsp),%rcx
  mov    0x1c(%rsp),%esi
  sub    %edi,%esi
  lea    (%rcx,%rdi,4),%rdi
  call   <merge_sort>
  mov    0x10(%rsp),%edx
  mov    0x1c(%rsp),%esi
  mov    0x8(%rsp),%rdi
  call   <merge@plt>
  mov    0x34(%rsp),%r9d
  mov    0x30(%rsp),%r8d
  mov    0x28(%rsp),%r10d
  mov    0x20(%rsp),%r11
L68:
  mov    %r10d,%edx
  mov    %r9d,%esi
  mov    %r11,%rdi
  mov    %r8d,0x8(%rsp)
  call   <merge@plt>
  mov    0x8(%rsp),%r8d
L64:
  mov    %r8d,%edx
  mov    %r15d,%esi
  mov    %rbx,%rdi
  call   <merge@plt>
L142:
  mov    %r14d,%r8d
  sub    %r15d,%r8d
  cmp    $0x1,%r8d
  jle    L57
  movslq %r15d,%rax
  mov    %r8d,%r9d
  lea    (%rbx,%rax,4),%rax
  sar    %r9d
  mov    %rax,0x8(%rsp)
  cmp    $0x1,%r9d
  je     L38
  mov    %r8d,%r10d
  sar    $0x2,%r10d
  cmp    $0x1,%r10d
  je     L291
  mov    %r8d,%edx
  mov    %rax,%rdi
  mov    %r9d,0x28(%rsp)
  sar    $0x3,%edx
  mov    %r8d,0x20(%rsp)
  mov    %edx,%esi
  mov    %r10d,0x1c(%rsp)
  mov    %edx,0x10(%rsp)
  call   <merge_sort>
  movslq 0x10(%rsp),%rax
  mov    0x8(%rsp),%rcx
  mov    0x1c(%rsp),%esi
  lea    (%rcx,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x1c(%rsp),%r10d
  mov    0x10(%rsp),%edx
  mov    0x8(%rsp),%rdi
  mov    %r10d,%esi
  mov    %r10d,0x10(%rsp)
  call   <merge@plt>
  mov    0x28(%rsp),%r9d
  mov    0x20(%rsp),%r8d
  mov    0x10(%rsp),%r10d
L291:
  mov    %r9d,%r11d
  sub    %r10d,%r11d
  cmp    $0x1,%r11d
  jle    L32
  mov    0x8(%rsp),%rcx
  movslq %r10d,%rax
  mov    %r11d,%edx
  mov    %r9d,0x34(%rsp)
  sar    %edx
  mov    %r8d,0x30(%rsp)
  lea    (%rcx,%rax,4),%rax
  mov    %edx,%esi
  mov    %r10d,0x28(%rsp)
  mov    %rax,%rdi
  mov    %r11d,0x20(%rsp)
  mov    %edx,0x1c(%rsp)
  mov    %rax,0x10(%rsp)
  call   <merge_sort>
  movslq 0x1c(%rsp),%rcx
  mov    0x10(%rsp),%rax
  mov    0x20(%rsp),%esi
  lea    (%rax,%rcx,4),%rdi
  sub    %ecx,%esi
  call   <merge_sort>
  mov    0x1c(%rsp),%edx
  mov    0x20(%rsp),%esi
  mov    0x10(%rsp),%rdi
  call   <merge@plt>
  mov    0x34(%rsp),%r9d
  mov    0x30(%rsp),%r8d
  mov    0x28(%rsp),%r10d
L32:
  mov    0x8(%rsp),%rdi
  mov    %r9d,%esi
  mov    %r10d,%edx
  mov    %r8d,0x1c(%rsp)
  mov    %r9d,0x10(%rsp)
  call   <merge@plt>
  mov    0x1c(%rsp),%r8d
  mov    0x10(%rsp),%r9d
L38:
  mov    %r8d,%r10d
  sub    %r9d,%r10d
  cmp    $0x1,%r10d
  jle    L80
  mov    0x8(%rsp),%rcx
  mov    %r10d,%r11d
  movslq %r9d,%rax
  sar    %r11d
  lea    (%rcx,%rax,4),%rcx
  cmp    $0x1,%r11d
  je     L244
  mov    %r10d,%edx
  mov    %rcx,%rdi
  mov    %r9d,0x34(%rsp)
  sar    $0x2,%edx
  mov    %r8d,0x30(%rsp)
  mov    %edx,%esi
  mov    %r10d,0x28(%rsp)
  mov    %r11d,0x20(%rsp)
  mov    %edx,0x1c(%rsp)
  mov    %rcx,0x10(%rsp)
  call   <merge_sort>
  movslq 0x1c(%rsp),%rax
  mov    0x10(%rsp),%rcx
  mov    0x20(%rsp),%esi
  lea    (%rcx,%rax,4),%rdi
  sub    %eax,%esi
  call   <merge_sort>
  mov    0x20(%rsp),%r11d
  mov    0x1c(%rsp),%edx
  mov    0x10(%rsp),%rdi
  mov    %r11d,%esi
  mov    %r11d,0x1c(%rsp)
  call   <merge@plt>
  mov    0x34(%rsp),%r9d
  mov    0x30(%rsp),%r8d
  mov    0x28(%rsp),%r10d
  mov    0x1c(%rsp),%r11d
  mov    0x10(%rsp),%rcx
L244:
  mov    %r10d,%eax
  sub    %r11d,%eax
  cmp    $0x1,%eax
  jle    L4
  movslq %r11d,%rdx
  mov    %rcx,0x28(%rsp)
  lea    (%rcx,%rdx,4),%rsi
  mov    %eax,%edx
  mov    %r10d,0x3c(%rsp)
  mov    %rsi,%rcx
  sar    %edx
  mov    %r9d,0x38(%rsp)
  mov    %edx,%esi
  mov    %rcx,%rdi
  mov    %r8d,0x34(%rsp)
  mov    %r11d,0x30(%rsp)
  mov    %eax,0x20(%rsp)
  mov    %edx,0x1c(%rsp)
  mov    %rcx,0x10(%rsp)
  call   <merge_sort>
  mov    0x10(%rsp),%rcx
  movslq 0x1c(%rsp),%rdi
  mov    0x20(%rsp),%esi
  sub    %edi,%esi
  lea    (%rcx,%rdi,4),%rdi
  call   <merge_sort>
  mov    0x1c(%rsp),%edx
  mov    0x20(%rsp),%esi
  mov    0x10(%rsp),%rdi
  call   <merge@plt>
  mov    0x3c(%rsp),%r10d
  mov    0x38(%rsp),%r9d
  mov    0x34(%rsp),%r8d
  mov    0x30(%rsp),%r11d
  mov    0x28(%rsp),%rcx
L4:
  mov    %r11d,%edx
  mov    %r10d,%esi
  mov    %rcx,%rdi
  mov    %r9d,0x1c(%rsp)
  mov    %r8d,0x10(%rsp)
  call   <merge@plt>
  mov    0x1c(%rsp),%r9d
  mov    0x10(%rsp),%r8d
L80:
  mov    0x8(%rsp),%rdi
  mov    %r9d,%edx
  mov    %r8d,%esi
  call   <merge@plt>
L57:
  mov    %r15d,%edx
  mov    %r14d,%esi
  mov    %rbx,%rdi
  call   <merge@plt>
L59:
  add    $0x48,%rsp
  mov    %r13d,%edx
  mov    %ebp,%esi
  mov    %r12,%rdi
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1050 <merge@plt>
  nopl   0x0(%rax,%rax,1)
L276:
  ret
```

assistant: ```c
void merge_sort(int *A, int size) {
  int midpoint;
  if (size < 2) {
    return;
  }
  midpoint = size / 2;
  merge_sort(A, midpoint);
  merge_sort(A + midpoint, size - midpoint);
  merge(A, size, midpoint);
}
```