gcc/testsuite/gcc.dg/alias-8.c

   1 // { dg-do compile }
   2 // { dg-options "-Wstrict-aliasing=2 -fstrict-aliasing" }
   3
   4 struct s {
   5   char    *p;
   6 };
   7
   8 void
   9 func(struct s *ptr)
  10 {
  11   *(void **)&ptr->p = 0; /* { dg-warning "type-punned pointer" "" { xfail *-*-* } } */
  12 }