/** Control flow optimization.
* Removes empty blocks doing if simplifications and loop simplifications.
- * A block is empty if it contains only a Jmp node and
- * Phi nodes.
+ * A block is empty if it contains only a Jmp node and Phi nodes.
* Merges single entry single exit blocks with their predecessor
* and propagates dead control flow by calling equivalent_node.
* Independent of compiler flag it removes Tuples from cf edges,
* Bad predecessors form blocks and unnecessary predecessors of End.
*
* @bug So far destroys backedge information.
+ * @bug Chokes on Id nodes if called in a certain order with other
+ * optimizations. Call local_optimize_graph before to remove
+ * Ids.
*/
void optimize_cf(ir_graph *irg);
+
/** Places an empty basic block on critical control flow edges thereby
removing them.
-
A critical control flow edge is an edge from a block with several
control exits to a block with several control entries (See Muchnic
p. 407).
-
- @todo not yet implemented!!! */
+ Is only executed if flag set_opt_critical_edges() is set.
+ @param irg IR Graph
+*/
void remove_critical_cf_edges(ir_graph *irg);
# endif /* _IRGOPT_H_ */