1  /* PR c/78408 */
       2  /* { dg-do compile { target size32plus } } */
       3  /* { dg-options "-O2 -fdump-tree-fab1-details" } */
       4  /* { dg-final { scan-tree-dump-not "after previous" "fab1" } } */
       5  
       6  struct S { char a[32]; };
       7  struct T { char a[65536]; };
       8  void bar (int, struct S *, struct S *, struct T *, struct T *);
       9  void baz (char *, char *);
      10  
      11  void
      12  f1 (void)
      13  {
      14    struct S a, b;
      15    struct T c, d;
      16    __builtin_memset (&b, 2, sizeof (b));
      17    a = b;
      18    __builtin_memset (&d, 3, sizeof (d));
      19    c = d;
      20    bar (3, &a, &b, &c, &d);
      21  }
      22  
      23  void
      24  f2 (void)
      25  {
      26    char a[64], b[64];
      27    __builtin_memset (a + 13, 2, 27);
      28    __builtin_memcpy (b + 4, a + 17, 24);
      29    baz (a, b);
      30  }
      31  
      32  void
      33  f3 (void)
      34  {
      35    char a[64], b[64];
      36    __builtin_memset (a + 13, 2, 27);
      37    __builtin_memcpy (b + 4, a + 12, 5);
      38    baz (a, b);
      39  }