1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -march=tigerlake -mno-sse" } */
       3  /* { dg-final { scan-assembler "rep movsb" } } */
       4  
       5  void
       6  foo (char *dest, char *src)
       7  {
       8    __builtin_memcpy (dest, src, 256);
       9  }