}

	var init ir.Nodes

	call := n.Call.(*ir.CallExpr)
	call.Fun = walkExpr(call.Fun, &init)

	if len(init) > 0 {
		init.Append(n)
		return ir.NewBlockStmt(n.Pos(), init)
	}
	return n
}

// walkIf walks an OIF node.
func walkIf(n *ir.IfStmt) ir.Node {
	n.Cond = walkExpr(n.Cond, n.PtrInit())
	walkStmtList(n.Body)
	walkStmtList(n.Else)
	return n

	if x := clo.Prealloc; x != nil {
		if !types.Identical(typ, x.Type()) {
			panic("closure type does not match order's assigned type")
		}
		addr.Prealloc = x
		clo.Prealloc = nil
	}

	return walkExpr(cfn, init)
}

// closureArgs returns a slice of expressions that can be used to
// initialize the given closure's free variables. These correspond
// one-to-one with the variables in clo.Func.ClosureVars, and will be