gcc/testsuite/gcc.c-torture/execute/20120105-1.c

   1 struct __attribute__((packed)) S
   2 {
   3   int a, b, c;
   4 };
   5
   6 static int __attribute__ ((noinline,noclone))
   7 extract(const char *p)
   8 {
   9   struct S s;
  10   __builtin_memcpy (&s, p, sizeof(struct S));
  11   return s.a;
  12 }
  13
  14 volatile int i;
  15
  16 int main (void)
  17 {
  18   char p[sizeof(struct S) + 1];
  19
  20   __builtin_memset (p, 0, sizeof(struct S) + 1);
  21   i = extract (p + 1);
  22
  23   return 0;
  24 }