gcc/testsuite/c-c++-common/pr51628-32.c

   1 /* PR c/51628.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O" } */
   4
   5 struct A
   6 {
   7    int i;
   8 };
   9
  10 struct B
  11 {
  12    char c;
  13    __attribute ((packed)) struct A ar[4];
  14    /* { dg-warning "attribute ignored" "" { target default_packed } .-1 } */
  15 };
  16
  17 struct B b;
  18
  19 int *p = &b.ar[1].i;
  20 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */