user: Demonstrate the C code that generates the assembly output below:

```asm
<test_collapse>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  movl   $0x0,-0x14(%rbp)
  jmp    L311
L268:
  addl   $0x1,-0x14(%rbp)
L311:
  cmpl   $0xf,-0x14(%rbp)
  jle    L268
  movl   $0x0,-0x14(%rbp)
  jmp    L238
L256:
  addl   $0x1,-0x14(%rbp)
L238:
  cmpl   $0xf,-0x14(%rbp)
  jle    L256
  movl   $0x0,-0x14(%rbp)
  jmp    L251
L248:
  addl   $0x1,-0x14(%rbp)
L251:
  cmpl   $0xf,-0x14(%rbp)
  jle    L248
  movl   $0x0,-0x14(%rbp)
  jmp    L261
L420:
  addl   $0x1,-0x14(%rbp)
L261:
  cmpl   $0xf,-0x14(%rbp)
  jle    L420
  movl   $0x0,-0x14(%rbp)
  jmp    L257
L325:
  addl   $0x1,-0x14(%rbp)
L257:
  cmpl   $0xf,-0x14(%rbp)
  jle    L325
  movl   $0x0,-0x14(%rbp)
  jmp    L84
L358:
  addl   $0x1,-0x14(%rbp)
L84:
  cmpl   $0xf,-0x14(%rbp)
  jle    L358
  movl   $0x0,-0x14(%rbp)
  jmp    L269
L288:
  addl   $0x1,-0x14(%rbp)
L269:
  cmpl   $0xf,-0x14(%rbp)
  jle    L288
  movl   $0x0,-0x14(%rbp)
  jmp    L111
L360:
  addl   $0x1,-0x14(%rbp)
L111:
  cmpl   $0xf,-0x14(%rbp)
  jle    L360
  movl   $0x0,-0x14(%rbp)
  jmp    L93
L37:
  addl   $0x1,-0x14(%rbp)
L93:
  cmpl   $0xf,-0x14(%rbp)
  jle    L37
  movl   $0x0,-0x14(%rbp)
  jmp    L144
L218:
  addl   $0x1,-0x14(%rbp)
L144:
  cmpl   $0xf,-0x14(%rbp)
  jle    L218
  movl   $0x0,-0x14(%rbp)
  jmp    L272
L2:
  addl   $0x1,-0x14(%rbp)
L272:
  cmpl   $0xf,-0x14(%rbp)
  jle    L2
  movl   $0x0,-0x14(%rbp)
  jmp    L434
L143:
  addl   $0x1,-0x14(%rbp)
L434:
  cmpl   $0xf,-0x14(%rbp)
  jle    L143
  movl   $0x0,-0x10(%rbp)
  jmp    L82
L342:
  movl   $0x0,-0xc(%rbp)
  jmp    L384
L435:
  movl   $0x0,-0x8(%rbp)
  jmp    L324
L429:
  movl   $0x0,-0x4(%rbp)
  jmp    L424
L277:
  mov    $0x0,%eax
  call   <foo@plt>
  addl   $0x1,-0x4(%rbp)
L424:
  cmpl   $0xf,-0x4(%rbp)
  jle    L277
  addl   $0x1,-0x8(%rbp)
L324:
  cmpl   $0xf,-0x8(%rbp)
  jle    L429
  addl   $0x1,-0xc(%rbp)
L384:
  cmpl   $0xf,-0xc(%rbp)
  jle    L435
  addl   $0x1,-0x10(%rbp)
L82:
  cmpl   $0xf,-0x10(%rbp)
  jle    L342
  movl   $0x0,-0x14(%rbp)
  jmp    L315
L317:
  addl   $0x1,-0x14(%rbp)
L315:
  cmpl   $0xf,-0x14(%rbp)
  jle    L317
  movl   $0x0,-0x14(%rbp)
  jmp    L160
L167:
  addl   $0x1,-0x14(%rbp)
L160:
  cmpl   $0xf,-0x14(%rbp)
  jle    L167
  movl   $0x0,-0x14(%rbp)
  jmp    L100
L399:
  addl   $0x1,-0x14(%rbp)
L100:
  cmpl   $0xf,-0x14(%rbp)
  jle    L399
  movl   $0x0,-0x14(%rbp)
  jmp    L124
L185:
  addl   $0x1,-0x14(%rbp)
L124:
  cmpl   $0xf,-0x14(%rbp)
  jle    L185
  movl   $0x0,-0x14(%rbp)
  jmp    L77
L222:
  addl   $0x1,-0x14(%rbp)
L77:
  cmpl   $0xf,-0x14(%rbp)
  jle    L222
  movl   $0x0,-0x14(%rbp)
  jmp    L431
L150:
  addl   $0x1,-0x14(%rbp)
L431:
  cmpl   $0xf,-0x14(%rbp)
  jle    L150
  nop
  nop
  leave
  ret
```

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