/*
- * 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.
*
/**
* @file
- * @brief higher level abstraction for the creation of spill and reload
- * instructions and rematerialisation of values.
- * @author Daniel Grund, Sebastian Hack, Matthias Braun
- * @date 29.09.2005
+ * @brief Option handling for spiller.
+ * @author Matthias Braun
+ * @date 12.10.2006
* @version $Id$
*/
#ifndef FIRM_BE_BESPILL_H
#define FIRM_BE_BESPILL_H
-#include "firm_types.h"
-#include "debug.h"
-
#include "bearch.h"
#include "beirg.h"
-typedef struct spill_env_t spill_env_t;
+extern int be_coalesce_spill_slots;
+extern int be_do_remats;
/**
- * Creates a new spill environment.
+ * An entry in the list of spill-algorithms.
*/
-spill_env_t *be_new_spill_env(be_irg_t *birg);
+typedef struct be_spiller_t {
+ /**
+ * The spill function.
+ *
+ * @param irg the graph to spill on
+ * @param cls the register class to spill
+ */
+ void (*spill)(ir_graph *irg, const arch_register_class_t *cls);
+} be_spiller_t;
/**
- * Deletes a spill environment.
- */
-void be_delete_spill_env(spill_env_t *senv);
-
-/**
- * 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
- * explicitly create spill nodes, they will be created automatically after
- * the definition of a value as soon as a reload is created. (we should add a
- * possibility for explicit spill placement in the future)
+ * Register a new spill algorithm.
*
- * @param senv The spill environment
- * @param to_spill The node which is about to be spilled
- * @param before The node before the reload should be added
- * @param reload_cls The register class the reloaded value will be put into
- * @param allow_remat Set to 1 if the node may be rematerialized instead of
- * reloaded
- */
-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);
-
-/**
- * Analog to be_add_reload, but places the reload "on an edge" between 2 blocks
- * @see be_add_reload
- */
-void be_add_reload_on_edge(spill_env_t *senv, ir_node *to_spill, ir_node *bl,
- int pos, const arch_register_class_t *reload_cls,
- int allow_remat);
-
-/**
- * Analog to be_add_reload but adds an already created rematerialized node.
+ * @param name the name of the spill algorithm,
+ * used to select it
+ * @param spiller a spill entry
*/
-void be_add_remat(spill_env_t *env, ir_node *to_spill, ir_node *before,
- ir_node *rematted_node);
+void be_register_spiller(const char *name, be_spiller_t *spiller);
/**
- * The main function that places real spills/reloads (or rematerializes values)
- * for all values where be_add_reload was called. It then rebuilds the
- * SSA-form and updates liveness information
- */
-void be_insert_spills_reloads(spill_env_t *senv);
-
-/**
- * There are 2 possibilities to spill a phi node: Only it's value, or replacing
- * the whole phi-node with a memory phi. Normally only the value of a phi will
- * be spilled unless you mark the phi with be_spill_phi.
- * (Remember that each phi needs a register, so you have to spill phis when
- * there are more phis than registers in a block)
- */
-void be_spill_phi(spill_env_t *env, ir_node *node);
-
-/**
- * Returns the estimated costs if a node would ge spilled. This does only return
- * the costs for the spill instructions, not the costs for needed reload
- * 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);
-
-/**
- * Returns the estimated costs if a node would get reloaded at a specific place
- * This returns the costs for a reload instructions, or when possible the costs
- * for a rematerialisation. The value is weighted by the estimated execution
- * frequency of the reload/rematerialisation.
+ * Execute the selected spill algorithm
+ *
+ * @param irg the graph to spill on
+ * @param cls the register class to spill
*/
-double be_get_reload_costs(spill_env_t *env, ir_node *to_spill,
- ir_node *before);
+void be_do_spill(ir_graph *irg, const arch_register_class_t *cls);
/**
- * Analog to be_get_reload_costs but returns the cost if the reload would be
- * placed "on an edge" between 2 blocks
+ * Adds additional copies, so constraints needing additional registers to be
+ * solved correctly induce the additional register pressure.
*/
-double be_get_reload_costs_on_edge(spill_env_t *env, ir_node *to_spill,
- ir_node *block, int pos);
+void be_pre_spill_prepare_constr(ir_graph *irg,
+ const arch_register_class_t *cls);
#endif
projects / libfirm / blobdiff