gcc/testsuite/c-c++-common/pr51628-26.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 struct A p = {1};
  10 int *addr;
  11
  12 int i, j;
  13
  14 void
  15 foo1 (void)
  16 {
  17   addr = (i = -1, &p.i);
  18 /* { dg-warning "may result in an unaligned pointer value" "" { target *-*-* } .-1 } */
  19 }
  20
  21 void
  22 foo2 (void)
  23 {
  24   addr = (i = -1, j = -2, &p.i);
  25 /* { dg-warning "may result in an unaligned pointer value" "" { target *-*-* } .-1 } */
  26 }
  27
  28 void
  29 foo3 (void)
  30 {
  31   addr = (i = -1, (j = -2, &p.i));
  32 /* { dg-warning "may result in an unaligned pointer value" "" { target *-*-* } .-1 } */
  33 }