1  /* PR target/77834 */
       2  /* { dg-do compile } */
       3  /* { dg-options "-O -ftree-pre -Wno-psabi" } */
       4  /* { dg-additional-options "-mstringop-strategy=libcall" { target i?86-*-* x86_64-*-* } } */
       5  
       6  typedef int V __attribute__ ((vector_size (64)));
       7  
       8  V
       9  foo (V u, V v, int w)
      10  {
      11    do
      12      {
      13        if (u[0]) v ^= u[w];
      14      }
      15    while ((V) { 0, u[w] }[1]);
      16    u = (V) { v[v[0]], u[u[0]] };
      17    return v + u;
      18  }