gcc/testsuite/c-c++-common/pr51628-29.c

   1 /* PR c/51628.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O" } */
   4
   5 struct A { int i; };
   6 struct B { struct A a; };
   7 struct C { struct B b __attribute__ ((packed)); };
   8 /* { dg-warning "attribute ignored" "" { target default_packed } .-1 } */
   9
  10 extern struct C *p;
  11
  12 int*
  13 g8 (void)
  14 {
  15   return &p->b.a.i;
  16 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  17 }