gcc/testsuite/gcc.dg/torture/pr57748-3.c

   1 /* PR middle-end/57748 */
   2 /* { dg-do run } */
   3 /* wrong code in expand_expr_real_1.  */
   4
   5 #include <stdlib.h>
   6
   7 extern void abort (void);
   8
   9 typedef long long V
  10   __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
  11
  12 typedef struct S { V a; V b[0]; } P __attribute__((aligned (1)));
  13
  14 struct __attribute__((packed)) T { char c; P s; };
  15
  16 void __attribute__((noinline, noclone))
  17 check (P *p)
  18 {
  19   if (p->b[0][0] != 3 || p->b[0][1] != 4)
  20     abort ();
  21 }
  22
  23 void __attribute__((noinline, noclone))
  24 foo (struct T *t)
  25 {
  26   V a = { 3, 4 };
  27   t->s.b[0] = a;
  28 }
  29
  30 int
  31 main ()
  32 {
  33   struct T *t = (struct T *) calloc (128, 1);
  34
  35   foo (t);
  36   check (&t->s);
  37
  38   free (t);
  39   return 0;
  40 }