gcc/testsuite/gcc.dg/packed-array.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fno-inline" } */
   3
   4 struct usb_interface_descriptor {
   5  unsigned short wMaxPacketSize;
   6   char e;
   7 } __attribute__ ((packed));
   8
   9 struct usb_device {
  10  int devnum;
  11  struct usb_interface_descriptor if_desc[2];
  12 };
  13
  14 extern int printf (const char *, ...);
  15
  16 void foo (unsigned short a)
  17 {
  18   printf ("%d\n", a);
  19 }
  20
  21 struct usb_device ndev;
  22
  23 void usb_set_maxpacket(int n)
  24 {
  25   int i;
  26
  27   for(i=0; i<n;i++)
  28     foo((&ndev)->if_desc[i].wMaxPacketSize);
  29 }
  30
  31 int
  32 main()
  33 {
  34   usb_set_maxpacket(2);
  35   return 0;
  36 }
  37
  38
  39
  40