gcc/testsuite/gcc.dg/torture/pr58041.c

   1 /* { dg-do run } */
   2
   3 typedef long long V
   4   __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
   5
   6 struct s
   7 {
   8   char u;
   9   V v[2];
  10 } __attribute__((packed,aligned(1)));
  11
  12 __attribute__((noinline, noclone))
  13 long long foo(struct s *x, int y, V *z)
  14 {
  15   V a = x->v[y];
  16   x->v[y] = *z;
  17   return a[1];
  18 }
  19
  20 struct s a = {0,{{0,0},{0,0}}};
  21 int main()
  22 {
  23   V v1 = {0,1};
  24   V v2 = {0,2};
  25
  26   if (foo(&a,0,&v1) != 0)
  27     __builtin_abort();
  28   if (foo(&a,0,&v2) != 1)
  29     __builtin_abort();
  30   if (foo(&a,1,&v1) != 0)
  31     __builtin_abort();
  32   return 0;
  33 }