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

   1 /* PR middle-end/7847 */
   2 /* Originator: <jk@tools.de> */
   3 /* { dg-do run } */
   4
   5 /* This used to fail on SPARC at runtime because of
   6    an unaligned memory access.  */
   7
   8 typedef char int8_t;
   9 typedef short int16_t;
  10 typedef int int32_t;
  11 typedef unsigned char uint8_t;
  12 typedef unsigned short uint16_t;
  13 typedef unsigned int uint32_t;
  14
  15 typedef struct {
  16     uint32_t address;
  17     uint16_t size;
  18 } __attribute__ ((packed)) sml_agl_data_t;
  19
  20 typedef struct {
  21   sml_agl_data_t data[9];
  22 } __attribute__ ((packed)) sml_agli_t;
  23
  24 typedef struct {
  25   sml_agli_t sml_agli;
  26 } __attribute__ ((packed)) dsi_t;
  27
  28 typedef struct {
  29   int a;
  30   dsi_t dsi_pack;
  31 } dvd_priv_t;
  32
  33 int dvd_read_sector(dvd_priv_t *d, unsigned char* data)
  34 {
  35   int i, skip=0;
  36
  37   for (i=0; i < 9; i++)
  38     if ((skip=d->dsi_pack.sml_agli.data[i].address) != 0)
  39       break;
  40
  41   return skip;
  42 }
  43
  44 int main(void)
  45 {
  46   static dvd_priv_t dvd_priv;
  47   dvd_read_sector(&dvd_priv, 0);
  48   return 0;
  49 }