[Bug target/20625] [4.0/4.1 regression] ivopts produces code that generates "unaligned access exception"

["tsv at solvo dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From tsv at solvo dot ru  2005-05-05 19:07 -------
gcc version 4.0.0 20050423 (Red Hat 4.0.0-2)

Here is another test case that generates unaligned access exception:

----------------------------------------
typedef union
{
   short i16;
   unsigned short u16;
   int i32;
   unsigned int u32;

   long i64;
   unsigned long u64;

   double dbl;
   unsigned char byt;
   char *str;
} DBusBasicValue;

void foo(void *p)
{
   DBusBasicValue *a;

   a = p;

   a->byt = 'a';
}

int main()
{
# include <asm/sysinfo.h>
# include <asm/unistd.h>
   unsigned int buf[2] =
     {
        SSIN_UACPROC, UAC_SIGBUS | UAC_NOPRINT
     };

   char buff[100];

   syscall(__NR_osf_setsysinfo, SSI_NVPAIRS, buf, 1, 0, 0, 0);

   foo(&buff[1]);
}
--------------------------------

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20625