gcc/testsuite/c-c++-common/pr51628-28.c

   1 /* PR c/51628.  */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O" } */
   4
   5 struct A {
   6   int i;
   7 } __attribute__ ((packed));
   8
   9 int *
  10 foo3 (struct A *p1, int *q1, int *q2, struct A *p2)
  11 {
  12   return (q1
  13           ? &p1->i
  14 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  15           : (q2 ? &p2->i : q2));
  16 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  17 }
  18
  19 int*
  20 foo4 (struct A *p1, int **q1, int *q2, int *q3, struct A *p2)
  21 {
  22   return (q1
  23           ? (*q1 = q2, &p1->i)
  24 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  25           : (q2
  26              ? (*q1 = &p1->i,
  27 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  28                 *q2 = 2, &p2->i)
  29 /* { dg-warning "may result in an unaligned pointer value" "" { target { ! default_packed } } .-1 } */
  30              : q2));
  31 }