user: 请从给定的汇编指令推导出C源代码：

```asm
<test_collapse>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  movl   $0x0,-0x14(%rbp)
  jmp    L239
L44:
  addl   $0x1,-0x14(%rbp)
L239:
  cmpl   $0xf,-0x14(%rbp)
  jle    L44
  movl   $0x0,-0x14(%rbp)
  jmp    L317
L99:
  addl   $0x1,-0x14(%rbp)
L317:
  cmpl   $0xf,-0x14(%rbp)
  jle    L99
  movl   $0x0,-0x14(%rbp)
  jmp    L200
L152:
  addl   $0x1,-0x14(%rbp)
L200:
  cmpl   $0xf,-0x14(%rbp)
  jle    L152
  movl   $0x0,-0x14(%rbp)
  jmp    L33
L161:
  addl   $0x1,-0x14(%rbp)
L33:
  cmpl   $0xf,-0x14(%rbp)
  jle    L161
  movl   $0x0,-0x14(%rbp)
  jmp    L5
L369:
  addl   $0x1,-0x14(%rbp)
L5:
  cmpl   $0xf,-0x14(%rbp)
  jle    L369
  movl   $0x0,-0x14(%rbp)
  jmp    L269
L0:
  addl   $0x1,-0x14(%rbp)
L269:
  cmpl   $0xf,-0x14(%rbp)
  jle    L0
  movl   $0x0,-0x14(%rbp)
  jmp    L386
L223:
  addl   $0x1,-0x14(%rbp)
L386:
  cmpl   $0xf,-0x14(%rbp)
  jle    L223
  movl   $0x0,-0x14(%rbp)
  jmp    L279
L198:
  addl   $0x1,-0x14(%rbp)
L279:
  cmpl   $0xf,-0x14(%rbp)
  jle    L198
  movl   $0x0,-0x14(%rbp)
  jmp    L389
L114:
  addl   $0x1,-0x14(%rbp)
L389:
  cmpl   $0xf,-0x14(%rbp)
  jle    L114
  movl   $0x0,-0x14(%rbp)
  jmp    L225
L26:
  addl   $0x1,-0x14(%rbp)
L225:
  cmpl   $0xf,-0x14(%rbp)
  jle    L26
  movl   $0x0,-0x14(%rbp)
  jmp    L97
L60:
  addl   $0x1,-0x14(%rbp)
L97:
  cmpl   $0xf,-0x14(%rbp)
  jle    L60
  movl   $0x0,-0x14(%rbp)
  jmp    L75
L151:
  addl   $0x1,-0x14(%rbp)
L75:
  cmpl   $0xf,-0x14(%rbp)
  jle    L151
  movl   $0x0,-0x10(%rbp)
  jmp    L136
L349:
  movl   $0x0,-0xc(%rbp)
  jmp    L1
L235:
  movl   $0x0,-0x8(%rbp)
  jmp    L398
L216:
  movl   $0x0,-0x4(%rbp)
  jmp    L380
L438:
  mov    $0x0,%eax
  call   <foo@plt>
  addl   $0x1,-0x4(%rbp)
L380:
  cmpl   $0xf,-0x4(%rbp)
  jle    L438
  addl   $0x1,-0x8(%rbp)
L398:
  cmpl   $0xf,-0x8(%rbp)
  jle    L216
  addl   $0x1,-0xc(%rbp)
L1:
  cmpl   $0xf,-0xc(%rbp)
  jle    L235
  addl   $0x1,-0x10(%rbp)
L136:
  cmpl   $0xf,-0x10(%rbp)
  jle    L349
  movl   $0x0,-0x14(%rbp)
  jmp    L368
L227:
  addl   $0x1,-0x14(%rbp)
L368:
  cmpl   $0xf,-0x14(%rbp)
  jle    L227
  movl   $0x0,-0x14(%rbp)
  jmp    L397
L14:
  addl   $0x1,-0x14(%rbp)
L397:
  cmpl   $0xf,-0x14(%rbp)
  jle    L14
  movl   $0x0,-0x14(%rbp)
  jmp    L214
L248:
  addl   $0x1,-0x14(%rbp)
L214:
  cmpl   $0xf,-0x14(%rbp)
  jle    L248
  movl   $0x0,-0x14(%rbp)
  jmp    L313
L206:
  addl   $0x1,-0x14(%rbp)
L313:
  cmpl   $0xf,-0x14(%rbp)
  jle    L206
  movl   $0x0,-0x14(%rbp)
  jmp    L13
L50:
  addl   $0x1,-0x14(%rbp)
L13:
  cmpl   $0xf,-0x14(%rbp)
  jle    L50
  movl   $0x0,-0x14(%rbp)
  jmp    L234
L331:
  addl   $0x1,-0x14(%rbp)
L234:
  cmpl   $0xf,-0x14(%rbp)
  jle    L331
  nop
  nop
  leave
  ret
```

assistant: ```c
void test_collapse() {
  int i;
#pragma omp parallel
#pragma omp for collapse
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse()
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(,
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(, )
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4,
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4, )
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4, , 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(4)
  for (int i1 = 0; i1 < 16; ++i1)
    for (int i2 = 0; i2 < 16; ++i2)
      for (int i3 = 0; i3 < 16; ++i3)
        for (int i4 = 0; i4 < 16; ++i4)
          foo();
#pragma omp parallel
#pragma omp for collapse(4, 8)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(2.5)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(foo())
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(-5)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(0)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp parallel
#pragma omp for collapse(5 - 5)
  for (i = 0; i < 16; ++i)
    ;
}
```