gcc/testsuite/gcc.dg/tree-ssa/alias-24.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3
   4 void f (const char *c, int *i)
   5 {
   6   *i = 42;
   7   __builtin_memcpy (i + 1, c, sizeof (int));
   8   if (*i != 42) __builtin_abort();
   9 }
  10
  11 extern void keepit ();
  12 void g (const char *c, int *i)
  13 {
  14   *i = 33;
  15   __builtin_memcpy (i - 1, c, 3 * sizeof (int));
  16   if (*i != 33) keepit();
  17 }
  18
  19 /* { dg-final { scan-tree-dump-not "abort" "optimized" } } */
  20 /* { dg-final { scan-tree-dump "keepit" "optimized" } } */
  21