//ww:run-exit 0
// #234 chained-leaf arm: `o.a.b = f()` with a >24B sret-class return
// routes the callee's hidden RDI at the leaf slot. Pre-fix both stages
// fell to the scalar tail and stored ONE word (the sret dest pointer).
package main;
type big = struct { x: i64, y: i64, z: i64, w: i64 };
type mid = struct { pad: i64, b: big };
type outer = struct { a: mid };

fn f() big = {
	let r: big;
	r.x = 11;
	r.y = 22;
	r.z = 33;
	r.w = 44;
	return r;
};

export fn main() i32 = {
	let o: outer;
	o.a.pad = 7;
	o.a.b = f();
	if (o.a.pad != 7) { return 1; };
	if (o.a.b.x != 11) { return 2; };
	if (o.a.b.y != 22) { return 3; };
	if (o.a.b.z != 33) { return 4; };
	if (o.a.b.w != 44) { return 5; };
	return 0;
};