Moved global variable heights to ia32_common_transform.

[libfirm] / ir / be / bespill.h

diff --git a/ir/be/bespill.h b/ir/be/bespill.h
index 693cd0f..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.
  *
@@ -46,6 +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
@@ -63,7 +73,14 @@ void be_delete_spill_env(spill_env_t *senv);
 void be_add_reload(spill_env_t *senv, ir_node *to_spill, ir_node *before,
                    const arch_register_class_t *reload_cls, int allow_remat);
 
-void be_add_reload_at_end(spill_env_t *env, ir_node *to_spill, ir_node *block,
+void be_add_reload2(spill_env_t *senv, ir_node *to_spill, ir_node *before, ir_node *can_spill_after,
+                   const arch_register_class_t *reload_cls, int allow_remat);
+
+/**
+ * Add a reload at the end of a block.
+ * Similar to be_add_reload_on_edge().
+ */
+void be_add_reload_at_end(spill_env_t *env, ir_node *to_spill, const ir_node *block,
                           const arch_register_class_t *reload_cls,
                           int allow_remat);
 
@@ -103,7 +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
@@ -114,6 +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
@@ -121,4 +142,34 @@ double be_get_reload_costs(spill_env_t *env, ir_node *to_spill,
 double be_get_reload_costs_on_edge(spill_env_t *env, ir_node *to_spill,
                                    ir_node *block, int pos);
 
+typedef struct {
+       unsigned n_spills;
+       unsigned n_reloads;
+       double spill_costs;
+       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.
+ * @param costs  A struct which will be filled with the costs.
+ */
+void be_get_total_spill_costs(be_irg_t *birg, be_total_spill_costs_t *costs);
+
+/**
+ * Check, if a node is rematerializable.
+ * @param env  The spill env.
+
+ */
+int be_is_rematerializable(spill_env_t *env, const ir_node *to_remat, const ir_node *before);
+
 #endif