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/* PR tree-optimization/51315 */
/* Reported by Jurij Smakov <jurij@wooyd.org> */
 
typedef unsigned int size_t;
 
extern void *memcpy (void *__restrict __dest,
       __const void *__restrict __src, size_t __n)
     __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
 
extern size_t strlen (__const char *__s)
     __attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
 
typedef __INT16_TYPE__ int16_t;
typedef __INT32_TYPE__ int32_t;
 
extern void abort (void);
 
int a;
 
static void __attribute__ ((noinline,noclone))
do_something (int item)
{
  a = item;
}
 
int
pack_unpack (char *s, char *p)
{
  char *send, *pend;
  char type;
  int integer_size;
 
  send = s + strlen (s);
  pend = p + strlen (p);
 
  while (p < pend)
    {
      type = *p++;
 
      switch (type)
 {
 case 's':
   integer_size = 2;
   goto unpack_integer;
 
 case 'l':
   integer_size = 4;
   goto unpack_integer;
 
 unpack_integer:
   switch (integer_size)
     {
     case 2:
       {
  union
  {
    int16_t i;
    char a[sizeof (int16_t)];
  }
  v;
  memcpy (v.a, s, sizeof (int16_t));
  s += sizeof (int16_t);
  do_something (v.i);
       }
       break;
 
     case 4:
       {
  union
  {
    int32_t i;
    char a[sizeof (int32_t)];
  }
  v;
  memcpy (v.a, s, sizeof (int32_t));
  s += sizeof (int32_t);
  do_something (v.i);
       }
       break;
     }
   break;
 }
    }
  return (int) *s;
}
 
int
main (void)
{
  int n = pack_unpack ("\200\001\377\376\035\300", "sl");
  if (n != 0)
    abort ();
  return 0;
}