<?php

$query = new WP_Query(array('posts_per_page' => -1, 'orderby' => 'title', 'order' => 'ASC'));

if ($query->have_posts())
    while ($query->have_posts()) {
        $query->the_post();
        echo '<a href="' . get_permalink() . '">' . (($title = get_the_title()) != '' ? $title : get_the_date()) . '</a><br/>';
    }
?>