-/* deepest common ancestor in the dominator tree of all nodes'
- blocks depending on us; our final placement has to dominate DCA. */
-static ir_node *get_deepest_common_ancestor(ir_node *node, ir_node *dca)
+/**
+ * Calculate the deepest common ancestor in the dominator tree of all nodes'
+ * blocks depending on node; our final placement has to dominate DCA.
+ *
+ * @param node the definition node
+ * @param dca the deepest common ancestor block so far, initially
+ * NULL
+ *
+ * @return the deepest common dominator ancestor of all blocks of node's users
+ */
+static ir_node *get_deepest_common_dom_ancestor(ir_node *node, ir_node *dca)