user: 请从给定的汇编指令推导出C源代码：

```asm
<test_safelen>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  movl   $0x0,-0x4(%rbp)
  jmp    L270
L116:
  addl   $0x1,-0x4(%rbp)
L270:
  cmpl   $0xf,-0x4(%rbp)
  jle    L116
  movl   $0x0,-0x4(%rbp)
  jmp    L249
L183:
  addl   $0x1,-0x4(%rbp)
L249:
  cmpl   $0xf,-0x4(%rbp)
  jle    L183
  movl   $0x0,-0x4(%rbp)
  jmp    L352
L156:
  addl   $0x1,-0x4(%rbp)
L352:
  cmpl   $0xf,-0x4(%rbp)
  jle    L156
  movl   $0x0,-0x4(%rbp)
  jmp    L243
L276:
  addl   $0x1,-0x4(%rbp)
L243:
  cmpl   $0xf,-0x4(%rbp)
  jle    L276
  movl   $0x0,-0x4(%rbp)
  jmp    L337
L24:
  addl   $0x1,-0x4(%rbp)
L337:
  cmpl   $0xf,-0x4(%rbp)
  jle    L24
  movl   $0x0,-0x4(%rbp)
  jmp    L268
L13:
  addl   $0x1,-0x4(%rbp)
L268:
  cmpl   $0xf,-0x4(%rbp)
  jle    L13
  movl   $0x0,-0x4(%rbp)
  jmp    L321
L373:
  addl   $0x1,-0x4(%rbp)
L321:
  cmpl   $0xf,-0x4(%rbp)
  jle    L373
  movl   $0x0,-0x4(%rbp)
  jmp    L193
L28:
  addl   $0x1,-0x4(%rbp)
L193:
  cmpl   $0xf,-0x4(%rbp)
  jle    L28
  movl   $0x0,-0x4(%rbp)
  jmp    L1
L311:
  addl   $0x1,-0x4(%rbp)
L1:
  cmpl   $0xf,-0x4(%rbp)
  jle    L311
  movl   $0x0,-0x4(%rbp)
  jmp    L376
L330:
  addl   $0x1,-0x4(%rbp)
L376:
  cmpl   $0xf,-0x4(%rbp)
  jle    L330
  movl   $0x0,-0x4(%rbp)
  jmp    L192
L282:
  addl   $0x1,-0x4(%rbp)
L192:
  cmpl   $0xf,-0x4(%rbp)
  jle    L282
  movl   $0x0,-0x4(%rbp)
  jmp    L314
L331:
  addl   $0x1,-0x4(%rbp)
L314:
  cmpl   $0xf,-0x4(%rbp)
  jle    L331
  movl   $0x0,-0x4(%rbp)
  jmp    L15
L149:
  addl   $0x1,-0x4(%rbp)
L15:
  cmpl   $0xf,-0x4(%rbp)
  jle    L149
  movl   $0x0,-0x4(%rbp)
  jmp    L60
L168:
  addl   $0x1,-0x4(%rbp)
L60:
  cmpl   $0xf,-0x4(%rbp)
  jle    L168
  movl   $0x0,-0x4(%rbp)
  jmp    L173
L365:
  addl   $0x1,-0x4(%rbp)
L173:
  cmpl   $0xf,-0x4(%rbp)
  jle    L365
  movl   $0x0,-0x4(%rbp)
  jmp    L114
L288:
  addl   $0x1,-0x4(%rbp)
L114:
  cmpl   $0xf,-0x4(%rbp)
  jle    L288
  movl   $0x0,-0x4(%rbp)
  jmp    L103
L301:
  addl   $0x1,-0x4(%rbp)
L103:
  cmpl   $0xf,-0x4(%rbp)
  jle    L301
  movl   $0x0,-0x4(%rbp)
  jmp    L342
L368:
  addl   $0x1,-0x4(%rbp)
L342:
  cmpl   $0xf,-0x4(%rbp)
  jle    L368
  movl   $0x0,-0x4(%rbp)
  jmp    L353
L289:
  addl   $0x1,-0x4(%rbp)
L353:
  cmpl   $0xf,-0x4(%rbp)
  jle    L289
  nop
  nop
  pop    %rbp
  ret
```

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