Keep flag added

[libfirm] / ir / be / beirgmod.h

diff --git a/ir/be/beirgmod.h b/ir/be/beirgmod.h
index 6d5240c..3d5c797 100644 (file)
--- a/ir/be/beirgmod.h
+++ b/ir/be/beirgmod.h
@@ -10,13 +10,58 @@
 #ifndef _BEIRGMOD_H
 #define _BEIRGMOD_H
 
+#include "pset.h"
+
+/*
+ * Forward type declaration.
+ */
 typedef struct _dom_front_info_t dom_front_info_t;
 
+/**
+ * Compute the dominance frontiers for a given graph.
+ * @param  irg The graphs.
+ * @return A pointer to the dominance frontier information.
+ */
 dom_front_info_t *be_compute_dominance_frontiers(ir_graph *irg);
+
+/**
+ * Get the dominance frontier of a block.
+ * @param info         A pointer to the dominance frontier information.
+ * @param block The block whose dominance frontier you want.
+ * @return A set containing the all blocks in the dominance frontier of @p block.
+ */
 pset *be_get_dominance_frontier(dom_front_info_t *info, ir_node *block);
+
+/**
+ * Free some dominance frontier information.
+ * @param info Some dominance frontier information.
+ */
 void be_free_dominance_frontiers(dom_front_info_t *info);
 
-void be_introduce_copies(dom_front_info_t *info, ir_node *orig,
-    int n, ir_node *copy_nodes[]);
+/**
+ * Introduce several copies for one node.
+ *
+ * A copy in this context means, that you want to introduce several new
+ * abstract values (in Firm: nodes) for which you know, that they
+ * represent the same concrete value. This is the case if you
+ * - copy
+ * - spill and reload
+ * - rematerialize
+ * a value.
+ *
+ * This function reroutes all uses of the original value to the copies in the
+ * corresponding dominance subtrees and creates Phi functions if neccessary.
+ *
+ * @param info         Dominance frontier information.
+ * @param orig         The node for which you want to introduce copies.
+ * @param n                    The number of copies ypu introduce.
+ * @param copies       An array of nodes which are copies of @p orig.
+ */
+void be_introduce_copies_ignore(dom_front_info_t *info, ir_node *orig,
+    int n, ir_node *copies[], pset *irgore_uses);
+
+void be_introduce_copies(dom_front_info_t *info, ir_node *orig, int n, ir_node *copies[]);
+
+void be_introduce_copies_pset(dom_front_info_t *info, pset *nodes);
 
 #endif