user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<main>:
  endbr64
  push   %r13
  mov    $0x18,%edi
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  call   <malloc@plt>
  test   %rax,%rax
  je     L28
  lea    D7(%rip),%rdi
  mov    %rax,%r12
  xor    %ebx,%ebx
  call   <puts@plt>
  mov    $0x1,%esi
  xor    %eax,%eax
  mov    %r12,%rbp
  lea    D85(%rip),%rdi
  lea    D64(%rip),%r13
  call   <printf@plt>
  mov    $0x4,%esi
  lea    D60(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x2,%esi
  lea    D72(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x6,%esi
  lea    D21(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x2,%esi
  movabs $0xfffffffeffffffff,%rax
  lea    D25(%rip),%rdi
  mov    %rax,(%r12)
  movabs $0xfffffffcfffffffd,%rax
  mov    %rax,0x8(%r12)
  movabs $0xfffffffafffffffb,%rax
  mov    %rax,0x10(%r12)
  xor    %eax,%eax
  call   <printf@plt>
  mov    $0x4,%esi
  lea    D27(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  lea    D37(%rip),%rdi
  movabs $0x100000001,%rax
  mov    %rax,0x10(%r12)
  call   <puts@plt>
  nopl   (%rax)
L18:
  mov    0x0(%rbp),%edx
  mov    %ebx,%esi
  mov    %r13,%rdi
  xor    %eax,%eax
  add    $0x1,%ebx
  add    $0x4,%rbp
  call   <printf@plt>
  cmp    $0x6,%ebx
  jne    L18
  mov    %r12,%rdi
  call   <free@plt>
  xor    %eax,%eax
L16:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L28:
  mov    $0x6,%esi
  lea    D0(%rip),%rdi
  xor    %eax,%eax
  call   <printf@plt>
  or     $0xffffffff,%eax
  jmp    L16
```

tool_calls: name: read_data
arguments: label: D7
type: string
name: read_data
arguments: label: D85
type: string
name: read_data
arguments: label: D64
type: string
name: read_data
arguments: label: D60
type: string
name: read_data
arguments: label: D72
type: string
name: read_data
arguments: label: D21
type: string
name: read_data
arguments: label: D25
type: string
name: read_data
arguments: label: D27
type: string
name: read_data
arguments: label: D37
type: string
name: read_data
arguments: label: D0
type: string

tool: D7: Diagnostics:

tool: D85: nthreads = %d


tool: D64: a[%d] = %d


tool: D60: indx     = %d


tool: D72: n        = %d


tool: D21: vlen     = %d


tool: D25: Length of segment per thread is %d


tool: D27: Offset for vector a is %d


tool: D37: After the parallel region:

tool: D0: Fatal error: memory allocation for a failed vlen = %d


assistant: ```c
int main() {
  int *a;
  int n = 2, nthreads, vlen, indx, offset = 4, i, TID;
  int failed;
  indx = offset;
#pragma omp parallel firstprivate(indx) shared(a, n, nthreads, failed)
  {
#pragma omp single
    {
      nthreads = 1;
      vlen = indx + n * nthreads;
      if ((a = (int *)malloc(vlen * sizeof(int))) == NULL)
        failed = 1;
      else
        failed = 0;
    }
  }
  if (failed == 1) {
    printf("Fatal error: memory allocation for a failed vlen = %d\n", vlen);
    return (-1);
  } else {
    printf("Diagnostics:\n");
    printf("nthreads = %d\n", nthreads);
    printf("indx     = %d\n", indx);
    printf("n        = %d\n", n);
    printf("vlen     = %d\n", vlen);
  }
  for (i = 0; i < vlen; i++)
    a[i] = -i - 1;
  printf("Length of segment per thread is %d\n", n);
  printf("Offset for vector a is %d\n", indx);
#pragma omp parallel default(none) firstprivate(indx) private(i, TID) shared(n, a)
  {
    TID = 0;
    indx += n * TID;
    for (i = indx; i < indx + n; i++)
      a[i] = TID + 1;
  }
  printf("After the parallel region:\n");
  for (i = 0; i < vlen; i++)
    printf("a[%d] = %d\n", i, a[i]);
  free(a);
  return (0);
}
```