gcc/testsuite/gcc.target/i386/movsi-sm-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fgcse-sm -minline-all-stringops" } */
   3
   4 /* Store motion used to fail to recognize killed expressions within
   5    parallels such as those generated for memory copying.  */
   6
   7 static const char s[1024] __attribute__ ((__aligned__ (32)))
   8   = "This is what we should get!";
   9
  10 int bug (int arg) {
  11   char str[sizeof(s) > 4 ? sizeof(s) : 4] __attribute__ ((__aligned__ (32)));
  12
  13   __builtin_memcpy (str, "Bug", 4);
  14
  15   if (arg <= 2)
  16     __builtin_memcpy (str, s, sizeof (s));
  17
  18   if (arg <= 1)
  19     __builtin_memcpy (str, "Err", 4);
  20
  21   __builtin_puts (str);
  22
  23   return str[0] != s[0];
  24 }
  25
  26 int main () {
  27   if (bug (2))
  28     __builtin_abort ();
  29
  30   return 0;
  31 }