static void
expand_one_register_var (tree var)
{
tree type = TREE_TYPE (var);
int unsignedp = TYPE_UNSIGNED (type);
enum machine_mode reg_mode
= promote_mode (type, DECL_MODE (var), &unsignedp, 0);
rtx x = gen_reg_rtx (reg_mode);
SET_DECL_RTL (var, x);
/* Note if the object is a user variable. */
if (!DECL_ARTIFICIAL (var))
{
mark_user_reg (x);
/* Trust user variables which have a pointer type to really
be pointers. Do not trust compiler generated temporaries
as our type system is totally busted as it relates to
pointer arithmetic which translates into lots of compiler
generated objects with pointer types, but which are not really
pointers. */
if (POINTER_TYPE_P (type))
mark_reg_pointer (x, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (var))));
}
}
int main() {
int i;
i = promote_mode (42, &i);
return i != 42;
}
