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

```asm
<test_collapse>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  movl   $0x0,-0x24(%rbp)
  jmp    L35
L178:
  addl   $0x1,-0x24(%rbp)
L35:
  cmpl   $0xf,-0x24(%rbp)
  jle    L178
  movl   $0x0,-0x24(%rbp)
  jmp    L300
L526:
  addl   $0x1,-0x24(%rbp)
L300:
  cmpl   $0xf,-0x24(%rbp)
  jle    L526
  movl   $0x0,-0x24(%rbp)
  jmp    L115
L94:
  addl   $0x1,-0x24(%rbp)
L115:
  cmpl   $0xf,-0x24(%rbp)
  jle    L94
  movl   $0x0,-0x24(%rbp)
  jmp    L85
L417:
  addl   $0x1,-0x24(%rbp)
L85:
  cmpl   $0xf,-0x24(%rbp)
  jle    L417
  movl   $0x0,-0x24(%rbp)
  jmp    L164
L380:
  addl   $0x1,-0x24(%rbp)
L164:
  cmpl   $0xf,-0x24(%rbp)
  jle    L380
  movl   $0x0,-0x24(%rbp)
  jmp    L4
L229:
  addl   $0x1,-0x24(%rbp)
L4:
  cmpl   $0xf,-0x24(%rbp)
  jle    L229
  movl   $0x0,-0x24(%rbp)
  jmp    L166
L273:
  addl   $0x1,-0x24(%rbp)
L166:
  cmpl   $0xf,-0x24(%rbp)
  jle    L273
  movl   $0x0,-0x24(%rbp)
  jmp    L337
L303:
  addl   $0x1,-0x24(%rbp)
L337:
  cmpl   $0xf,-0x24(%rbp)
  jle    L303
  movl   $0x0,-0x24(%rbp)
  jmp    L529
L543:
  addl   $0x1,-0x24(%rbp)
L529:
  cmpl   $0xf,-0x24(%rbp)
  jle    L543
  movl   $0x0,-0x24(%rbp)
  jmp    L485
L161:
  addl   $0x1,-0x24(%rbp)
L485:
  cmpl   $0xf,-0x24(%rbp)
  jle    L161
  movl   $0x0,-0x24(%rbp)
  jmp    L53
L228:
  addl   $0x1,-0x24(%rbp)
L53:
  cmpl   $0xf,-0x24(%rbp)
  jle    L228
  movl   $0x0,-0x24(%rbp)
  jmp    L504
L0:
  addl   $0x1,-0x24(%rbp)
L504:
  cmpl   $0xf,-0x24(%rbp)
  jle    L0
  movl   $0x0,-0x20(%rbp)
  jmp    L250
L165:
  movl   $0x0,-0x1c(%rbp)
  jmp    L439
L88:
  movl   $0x0,-0x18(%rbp)
  jmp    L412
L122:
  movl   $0x0,-0x14(%rbp)
  jmp    L452
L487:
  mov    $0x0,%eax
  call   <foo@plt>
  addl   $0x1,-0x14(%rbp)
L452:
  cmpl   $0xf,-0x14(%rbp)
  jle    L487
  addl   $0x1,-0x18(%rbp)
L412:
  cmpl   $0xf,-0x18(%rbp)
  jle    L122
  addl   $0x1,-0x1c(%rbp)
L439:
  cmpl   $0xf,-0x1c(%rbp)
  jle    L88
  addl   $0x1,-0x20(%rbp)
L250:
  cmpl   $0xf,-0x20(%rbp)
  jle    L165
  movl   $0x0,-0x24(%rbp)
  jmp    L215
L365:
  addl   $0x1,-0x24(%rbp)
L215:
  cmpl   $0xf,-0x24(%rbp)
  jle    L365
  movl   $0x0,-0x24(%rbp)
  jmp    L478
L555:
  addl   $0x1,-0x24(%rbp)
L478:
  cmpl   $0xf,-0x24(%rbp)
  jle    L555
  movl   $0x0,-0x24(%rbp)
  jmp    L177
L143:
  addl   $0x1,-0x24(%rbp)
L177:
  cmpl   $0xf,-0x24(%rbp)
  jle    L143
  movl   $0x0,-0x24(%rbp)
  jmp    L189
L374:
  addl   $0x1,-0x24(%rbp)
L189:
  cmpl   $0xf,-0x24(%rbp)
  jle    L374
  movl   $0x0,-0x24(%rbp)
  jmp    L534
L205:
  addl   $0x1,-0x24(%rbp)
L534:
  cmpl   $0xf,-0x24(%rbp)
  jle    L205
  movl   $0x0,-0x24(%rbp)
  jmp    L441
L475:
  addl   $0x1,-0x24(%rbp)
L441:
  cmpl   $0xf,-0x24(%rbp)
  jle    L475
  movl   $0x0,-0x24(%rbp)
  jmp    L324
L519:
  movl   $0x0,-0x10(%rbp)
  jmp    L433
L518:
  movl   $0x0,-0xc(%rbp)
  jmp    L342
L459:
  mov    -0x10(%rbp),%eax
  add    %eax,-0x24(%rbp)
  addl   $0x1,-0xc(%rbp)
L342:
  cmpl   $0xf,-0xc(%rbp)
  jle    L459
  addl   $0x1,-0x10(%rbp)
L433:
  cmpl   $0xf,-0x10(%rbp)
  jle    L518
  addl   $0x1,-0x24(%rbp)
L324:
  cmpl   $0xf,-0x24(%rbp)
  jle    L519
  movl   $0x0,-0x24(%rbp)
  jmp    L398
L318:
  movl   $0x0,-0x8(%rbp)
  jmp    L507
L262:
  movl   $0x0,-0x4(%rbp)
  jmp    L77
L287:
  mov    -0x8(%rbp),%eax
  add    %eax,-0x24(%rbp)
  addl   $0x1,-0x4(%rbp)
L77:
  cmpl   $0xf,-0x4(%rbp)
  jle    L287
  addl   $0x1,-0x8(%rbp)
L507:
  cmpl   $0xf,-0x8(%rbp)
  jle    L262
  addl   $0x1,-0x24(%rbp)
L398:
  cmpl   $0xf,-0x24(%rbp)
  jle    L318
  nop
  nop
  leave
  ret
```

assistant: ```c
void test_collapse() {
  int i;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse()
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(,
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(, )
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4,
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4, )
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(4, , 4)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd 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 target
#pragma omp teams
#pragma omp distribute simd collapse(4, 8)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(2.5)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(foo())
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(-5)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(0)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(5 - 5)
  for (i = 0; i < 16; ++i)
    ;
#pragma omp target
#pragma omp teams
#pragma omp distribute simd collapse(2) reduction(+ : i)
  for (i = 0; i < 16; ++i)
    for (int j = 0; j < 16; ++j)
#pragma omp for reduction(+ : i, j)
      for (int k = 0; k < 16; ++k)
        i += j;
#pragma omp target
#pragma omp teams
  for (i = 0; i < 16; ++i)
    for (int j = 0; j < 16; ++j)
#pragma omp distribute simd reduction(+ : i, j)
      for (int k = 0; k < 16; ++k)
        i += j;
}
```