gcc/testsuite/gcc.dg/torture/pr57748-2.c

   1 /* PR middle-end/57748 */
   2 /* { dg-do run } */
   3 /* wrong code in expand_assignment:
   4    misalignp == true, !MEM_P (to_rtx),
   5    offset == 0, bitpos >= GET_MODE_PRECISION,
   6    => result = NULL.  */
   7
   8 #include <stdlib.h>
   9
  10 extern void abort (void);
  11
  12 typedef long long V
  13   __attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
  14
  15 typedef struct S { V a; V b[0]; } P __attribute__((aligned (1)));
  16
  17 struct __attribute__((packed)) T { char c; P s; };
  18
  19 void __attribute__((noinline, noclone))
  20 check (struct T *t)
  21 {
  22   if (t->s.b[0][0] != 3 || t->s.b[0][1] != 4)
  23     abort ();
  24 }
  25
  26 void __attribute__((noinline, noclone))
  27 foo (P *p)
  28 {
  29   V a = { 3, 4 };
  30   p->b[0] = a;
  31 }
  32
  33 int
  34 main ()
  35 {
  36   struct T *t = (struct T *) calloc (128, 1);
  37
  38   foo (&t->s);
  39   check (t);
  40
  41   free (t);
  42   return 0;
  43 }