gcc/testsuite/gcc.dg/torture/pr52419.c

   1 /* PR middle-end/52419 */
   2 /* { dg-do run } */
   3
   4 extern void abort (void);
   5
   6 typedef long long V
   7   __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
   8
   9 typedef struct S { V b; } P __attribute__((aligned (1)));
  10
  11 struct __attribute__((packed)) T { char c; P s; };
  12
  13 __attribute__((noinline, noclone)) void
  14 foo (P *p)
  15 {
  16   p->b[1] = 5;
  17 }
  18
  19 int
  20 main ()
  21 {
  22   V a = { 3, 4 };
  23   struct T t;
  24
  25   t.s.b = a;
  26   foo (&t.s);
  27
  28   if (t.s.b[0] != 3 || t.s.b[1] != 5)
  29     abort ();
  30
  31   return 0;
  32 }