gcc/testsuite/gcc.dg/pr40971.c

   1 /* PR target/40971 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O -fstack-protector -fno-strict-aliasing" } */
   4 /* { dg-require-effective-target fstack_protector } */
   5 /* { dg-require-effective-target size20plus } */
   6
   7 extern void bar (char *);
   8
   9 void
  10 foo (int f, long a)
  11 {
  12   {
  13     char d[32768];
  14     bar (d);
  15   }
  16   double b = f;
  17   while (a)
  18     {
  19       char c[sizeof (double)];
  20       __builtin_memcpy (c, &b, sizeof (c));
  21       if (*(double *) c != 2.0)
  22         break;
  23     }
  24 }