gnu/dist/gcc4/gcc/testsuite/gcc.dg/pr17112-1.c

   1 /* PR middle-end/17112 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 extern void abort(void);
   6
   7 typedef struct {
   8   int int24:24  __attribute__ ((packed)); /* { dg-warning "attribute ignored" "" { target { default_packed && { ! pcc_bitfield_type_matters } } } } */
   9 } myint24;
  10
  11 myint24 x[3] = {
  12   0x123456,
  13   0x789abc,
  14   0xdef012
  15 };
  16
  17 myint24 y[3];  // starts out as zeros
  18
  19 void foo()
  20 {
  21   y[1] = x[1];
  22 }
  23
  24 int main()
  25 {
  26   foo();
  27
  28   if (y[0].int24 != 0 || y[2].int24 != 0)
  29     abort();
  30   return 0;
  31 }
  32