+ * @ingroup irana
+ * @defgroup ir_heights Node Heights
+ *
+ * The height is a measure for the longest datadependencies path from a node to
+ * the end of a basic block. This is usefull for scheduling heuristics and can
+ * also be used to speedup reachability queries.
+ *
+ * @{
+ */
+
+/**
+ * Returns the height of a node inside a basic block.