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struct __attribute__((packed)) S

{

  int a, b, c;

};

static int __attribute__ ((noinline,noclone))

extract(const char *p)

{

  struct S s;

  __builtin_memcpy (&s, p, sizeof(struct S));

  return s.a;

}

volatile int i;

int main (void)

{

  char p[sizeof(struct S) + 1];

  __builtin_memset (p, 0, sizeof(struct S) + 1);

  i = extract (p + 1);

  return 0;

}