/** If arg is an argument of the node, returns it's position, -1 otherwise */
int get_irn_pred_pos(ir_node *node, ir_node *arg);
/** Gets the visited counter of a node. */
-unsigned long get_irn_visited(const ir_node *node);
+ir_visited_t get_irn_visited(const ir_node *node);
/** Sets the visited counter of a node. */
-void set_irn_visited(ir_node *node, unsigned long visited);
+void set_irn_visited(ir_node *node, ir_visited_t visited);
/** Sets visited to get_irg_visited(current_ir_graph). */
void mark_irn_visited(ir_node *node);
-/** Returns 1 if visited < get_irg_visited(current_ir_graph). */
-int irn_not_visited(const ir_node *node);
/** Returns 1 if visited >= get_irg_visited(current_ir_graph). */
int irn_visited(const ir_node *node);
+/** Returns 1 if visited >= get_irg_visited(current_ir_graph). Marks the node
+ * visited, if it was not. */
+int irn_visited_else_mark(ir_node *node);
/**
* Sets the link of a node.
/** A visited flag only for block nodes.
* @see also: get_irn_visited() inc_irg_visited() inc_irg_block_visited()*/
-unsigned long get_Block_block_visited(const ir_node *node);
-void set_Block_block_visited(ir_node *node, unsigned long visit);
+ir_visited_t get_Block_block_visited(const ir_node *node);
+void set_Block_block_visited(ir_node *node, ir_visited_t visit);
/**
* Marks a block as dead but do not replace it with a Bad node.