gcc/testsuite/gcc.dg/pr35258.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O1" } */
   3
   4 extern void *memcpy (void *, const void *, __SIZE_TYPE__);
   5 extern int memcmp (const void *, const void *, __SIZE_TYPE__);
   6 extern void abort(void);
   7
   8 char str[9] = "1234";
   9
  10 void
  11 bar (void)
  12 {
  13   unsigned int temp;
  14   char *p = &str[2];
  15
  16   memcpy (&temp, &str[1], 4);
  17   memcpy (p, &temp, 4);
  18   str[1] = '.';
  19 }
  20
  21 int main()
  22 {
  23   bar();
  24   if (memcmp (str, "1.234", 5) != 0)
  25     abort ();
  26
  27   return 0;
  28 }