user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<test_safelen>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  movl   $0x0,-0x4(%rbp)
  jmp    L317
L68:
  addl   $0x1,-0x4(%rbp)
L317:
  cmpl   $0xf,-0x4(%rbp)
  jle    L68
  movl   $0x0,-0x4(%rbp)
  jmp    L315
L338:
  addl   $0x1,-0x4(%rbp)
L315:
  cmpl   $0xf,-0x4(%rbp)
  jle    L338
  movl   $0x0,-0x4(%rbp)
  jmp    L27
L12:
  addl   $0x1,-0x4(%rbp)
L27:
  cmpl   $0xf,-0x4(%rbp)
  jle    L12
  movl   $0x0,-0x4(%rbp)
  jmp    L275
L10:
  addl   $0x1,-0x4(%rbp)
L275:
  cmpl   $0xf,-0x4(%rbp)
  jle    L10
  movl   $0x0,-0x4(%rbp)
  jmp    L95
L74:
  addl   $0x1,-0x4(%rbp)
L95:
  cmpl   $0xf,-0x4(%rbp)
  jle    L74
  movl   $0x0,-0x4(%rbp)
  jmp    L331
L240:
  addl   $0x1,-0x4(%rbp)
L331:
  cmpl   $0xf,-0x4(%rbp)
  jle    L240
  movl   $0x0,-0x4(%rbp)
  jmp    L70
L210:
  addl   $0x1,-0x4(%rbp)
L70:
  cmpl   $0xf,-0x4(%rbp)
  jle    L210
  movl   $0x0,-0x4(%rbp)
  jmp    L183
L214:
  addl   $0x1,-0x4(%rbp)
L183:
  cmpl   $0xf,-0x4(%rbp)
  jle    L214
  movl   $0x0,-0x4(%rbp)
  jmp    L9
L134:
  addl   $0x1,-0x4(%rbp)
L9:
  cmpl   $0xf,-0x4(%rbp)
  jle    L134
  movl   $0x0,-0x4(%rbp)
  jmp    L325
L323:
  addl   $0x1,-0x4(%rbp)
L325:
  cmpl   $0xf,-0x4(%rbp)
  jle    L323
  movl   $0x0,-0x4(%rbp)
  jmp    L319
L330:
  addl   $0x1,-0x4(%rbp)
L319:
  cmpl   $0xf,-0x4(%rbp)
  jle    L330
  movl   $0x0,-0x4(%rbp)
  jmp    L110
L307:
  addl   $0x1,-0x4(%rbp)
L110:
  cmpl   $0xf,-0x4(%rbp)
  jle    L307
  movl   $0x0,-0x4(%rbp)
  jmp    L237
L229:
  addl   $0x1,-0x4(%rbp)
L237:
  cmpl   $0xf,-0x4(%rbp)
  jle    L229
  movl   $0x0,-0x4(%rbp)
  jmp    L75
L45:
  addl   $0x1,-0x4(%rbp)
L75:
  cmpl   $0xf,-0x4(%rbp)
  jle    L45
  movl   $0x0,-0x4(%rbp)
  jmp    L145
L50:
  addl   $0x1,-0x4(%rbp)
L145:
  cmpl   $0xf,-0x4(%rbp)
  jle    L50
  movl   $0x0,-0x4(%rbp)
  jmp    L274
L348:
  addl   $0x1,-0x4(%rbp)
L274:
  cmpl   $0xf,-0x4(%rbp)
  jle    L348
  movl   $0x0,-0x4(%rbp)
  jmp    L111
L109:
  addl   $0x1,-0x4(%rbp)
L111:
  cmpl   $0xf,-0x4(%rbp)
  jle    L109
  movl   $0x0,-0x4(%rbp)
  jmp    L254
L356:
  addl   $0x1,-0x4(%rbp)
L254:
  cmpl   $0xf,-0x4(%rbp)
  jle    L356
  movl   $0x0,-0x4(%rbp)
  jmp    L163
L102:
  addl   $0x1,-0x4(%rbp)
L163:
  cmpl   $0xf,-0x4(%rbp)
  jle    L102
  nop
  nop
  pop    %rbp
  ret
```

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