gcc/testsuite/gcc.dg/pr17112-1.c

   1 /* PR middle-end/17112 */
   2 /* { dg-do run } */
   3 /* { dg-require-effective-target int32plus } */
   4 /* { dg-options "-O2" } */
   5
   6 extern void abort(void);
   7
   8 typedef struct {
   9   int int24:24  __attribute__ ((packed)); /* { dg-warning "attribute ignored" "" { target { default_packed && { ! pcc_bitfield_type_matters } } } } */
  10 } myint24;
  11
  12 myint24 x[3] = {
  13   0x123456,
  14   0x789abc,
  15   0xdef012
  16 };
  17
  18 myint24 y[3];  // starts out as zeros
  19
  20 void foo()
  21 {
  22   y[1] = x[1];
  23 }
  24
  25 int main()
  26 {
  27   foo();
  28
  29   if (y[0].int24 != 0 || y[2].int24 != 0)
  30     abort();
  31   return 0;
  32 }
  33