gcc/testsuite/gcc.dg/pr78408-2.c

   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 }