namespace;
include rt;

// joins: something given away on one path is dead afterwards, and the paths
// that still own it free it on the way in. nothing here leaks.
fn take(.d p) { return p[0]; }
fn later(.d p);	// not needed any more, but still allowed
int*.u mk(int v) { int* p = rt.new(int); *p = v; return u*p; }
fn count(int n) { let s = 0; switch (n % 4) { case 0: s = 10; case 1, 2: s = 20; break; default: s = 30; } return s; }
fn main() {
	let base = rt.live_objects(), i = 0, hits = 0, k;
	while (i < 50) {
		let x = mk(i);
		if (i % 3 == 0) take(d*x);	// else: freed here by the fixup
		i++;
	}
	rt.put_n(rt.live_objects() - base); rt.put_c(' ');
	// give away and break: fine now; the normal exit frees it
	i = 0;
	let y = mk(7);
	while (i < 10) { if (i == 4) { take(d*y); break; } i++; }
	rt.put_n(rt.live_objects() - base); rt.put_c(' ');
	let z = mk(5);
	while (1) { if (z[0] == 5) { hits = take(d*z); break; } }
	rt.put_n(hits); rt.put_c(' ');
	rt.put_n(count(0) + count(1) + count(2) + count(3)); rt.put_c(' ');
	k = i > 3 ? i * 2 : 0 - 1;
	rt.put_n(k); rt.put_c(' ');
	rt.put_n(forward(rt.new(int))); rt.put_c(' ');	// tagged and defined below: the prescan knows .d
	int** pp; int* q = rt.new(int); *q = 9; pp = &q; rt.put_n(**pp); rt.free(d*q); rt.put_c(' ');
	rt.put_n(rt.live_objects() - base); rt.put_c(10);
	return 0;
}
fn forward(int*.d p) { return 3 + *p; }