Use symbolic names instead of magic values for the position parameter of get_irn_n().

[libfirm] / ir / be / bespill.h

diff --git a/ir/be/bespill.h b/ir/be/bespill.h
index 6b33c05..018f52f 100644 (file)
--- a/ir/be/bespill.h
+++ b/ir/be/bespill.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -46,8 +46,16 @@ spill_env_t *be_new_spill_env(be_irg_t *birg);
  */
 void be_delete_spill_env(spill_env_t *senv);
 
+/**
+ * Return the last control flow node of a block.
+ */
 ir_node *be_get_end_of_block_insertion_point(const ir_node *block);
 
+/**
+ * Marks a point until which a node must be spilled.
+ */
+void be_add_spill(spill_env_t *senv, ir_node *to_spill, ir_node *after);
+
 /**
  * Inserts a new entry into the list of reloads to place (the real nodes will
  * be created when be_insert_spills_reloads is run). You don't have to
@@ -112,7 +120,7 @@ void be_spill_phi(spill_env_t *env, ir_node *node);
  * instructions. The value is weighted by the estimated execution frequency of
  * the spill.
  */
-double be_get_spill_costs(spill_env_t *env, ir_node *to_spill, ir_node *after);
+double be_get_spill_costs(spill_env_t *env, ir_node *to_spill, ir_node *before);
 
 /**
  * Returns the estimated costs if a node would get reloaded at a specific place
@@ -123,6 +131,10 @@ double be_get_spill_costs(spill_env_t *env, ir_node *to_spill, ir_node *after);
 double be_get_reload_costs(spill_env_t *env, ir_node *to_spill,
                            ir_node *before);
 
+unsigned be_get_reload_costs_no_weight(spill_env_t *env, const ir_node *to_spill,
+                                       const ir_node *before);
+
+
 /**
  * Analog to be_get_reload_costs but returns the cost if the reload would be
  * placed "on an edge" between 2 blocks
@@ -137,6 +149,15 @@ typedef struct {
        double reload_costs;
 } be_total_spill_costs_t;
 
+/**
+ * Insert a spill after the definition of the given node if there is a reload that is not dominated by some spill.
+ * This function checks whether there is a reload that is not dominated by some spill for that node.
+ * If so, it inserts a spill right after the definition of the node.
+ * @param env The spill environment.
+ * @param irn The node to check for.
+ */
+void make_spill_locations_dominate_irn(spill_env_t *env, ir_node *irn);
+
 /**
  * Collect spill/reload cost statistics for a graph.
  * @param birg   The backend graph.