+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
/**
- * Header for copy optimization problem. Analysis and set up of the problem.
- * @author Daniel Grund
- * @date 12.04.2005
+ * @file
+ * @brief Copy minimization driver.
+ * @author Daniel Grund
+ * @date 11.04.2005
+ * @version $Id$
+ *
+ * Main file for the optimization reducing the copies needed for:
+ * - Phi coalescing
+ * - Register-constrained nodes
+ * - Two-address code instructions
*/
+#ifndef FIRM_BE_BECOPYOPT_H
+#define FIRM_BE_BECOPYOPT_H
-#ifndef _BECOPYOPT_H
-#define _BECOPYOPT_H
+#include <stdio.h>
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include "firm_types.h"
+#include "bechordal.h"
+#include "beutil.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include <alloca.h>
-#include <sys/types.h>
-#include <sys/stat.h>
+/**
+ * Flags for dumping the IFG.
+ */
+enum {
+ CO_IFG_DUMP_COLORS = 1, /**< Dump the graph colored. */
+ CO_IFG_DUMP_LABELS = 2, /**< Dump node/edge labels. */
+ CO_IFG_DUMP_SHAPE = 4, /**< Give constrained nodes special shapes. */
+ CO_IFG_DUMP_CONSTR = 8 /**< Dump the node constraints in the label. */
+};
+
+/**
+ * Algorithms.
+ */
+enum {
+ CO_ALGO_NONE,
+ CO_ALGO_HEUR,
+ CO_ALGO_HEUR2,
+ CO_ALGO_HEUR3,
+ CO_ALGO_HEUR4,
+ CO_ALGO_ILP,
+ CO_ALGO_LAST
+};
+
+/** The driver for copy minimization. */
+void co_driver(be_chordal_env_t *cenv);
-#include "debug.h"
-#include "obst.h"
-#include "list.h"
-#include "set.h"
-#include "pset.h"
-#include "bitset.h"
-#include "sp_matrix.h"
+typedef struct _copy_opt_t copy_opt_t;
-#include "irgraph.h"
-#include "irgwalk.h"
-#include "irnode.h"
-#include "irdom.h"
-#include "irouts.h"
+typedef int(*cost_fct_t)(const copy_opt_t *, ir_node *, ir_node *, int);
-#include "benumb_t.h"
-#include "belive_t.h"
-#include "bera_t.h"
-#include "bechordal_t.h"
+/** A coalescing algorithm. */
+typedef int (co_algo_t)(copy_opt_t *);
/**
- * TODO THIS EXTERNAL THINGS
- * define get_weight to sth representing the _gain_ if node n and m
- * have the same color. Must return values MIN_WEIGHT <= . <= MAX_WEIGHT.
+ * Generate the problem. Collect all information and optimizable nodes.
*/
-#define get_weight(n,m) 1
-#define is_possible_color(irn, col) 1
-#define MAX_COLORS 32
+copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, cost_fct_t get_costs);
/**
- * A single unit of optimization. Lots of these form a copy-opt problem
+ * Free the space used...
*/
-typedef struct _unit_t {
- struct list_head units; /**< chain for all units */
- int interf; /**< number of nodes dropped due to interference */
- int node_count; /**< size of the nodes array */
- const ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */
+void free_copy_opt(copy_opt_t *co);
- /* for heuristic */
- int mis_size; /**< size of a mis considering only ifg (not coloring conflicts) */
- struct list_head queue; /**< list of (mis/color) sorted by size of mis */
-} unit_t;
+/**
+ * Checks if a node is optimizable, viz. has something to do with coalescing
+ * @param arch The architecture environment
+ * @param irn The irn to check
+ */
+int co_is_optimizable_root(const copy_opt_t *co, ir_node *irn);
/**
- * Data representing the problem of copy minimization.
+ * Computes the costs of a copy according to loop depth
+ * @param co The copy opt object.
+ * @param pos the argument position of arg in the root arguments
+ * @return Must be >= 0 in all cases.
*/
-typedef struct _copy_opt_t {
- ir_graph *irg; /**< the irg which is processed */
- struct list_head units; /**< all units to optimize in right oreder */
- pset *roots; /**< used only temporary for detecting multiple appends */
+int co_get_costs_loop_depth(const copy_opt_t *co, ir_node *root, ir_node* arg, int pos);
- /* for heuristic */
- pset *pinned_global; /**< optimized nodes should not be altered any more */
-} copy_opt_t;
+/**
+ * Computes the costs of a copy according to execution frequency
+ * @param co The copy opt object.
+ * @param pos the argument position of arg in the root arguments
+ * @return Must be >= 0 in all cases.
+ */
+int co_get_costs_exec_freq(const copy_opt_t *co, ir_node *root, ir_node* arg, int pos);
+/**
+ * All costs equal 1. Using this will reduce the _number_ of copies.
+ * @param co The copy opt object.
+ * @return Must be >= 0 in all cases.
+ */
+int co_get_costs_all_one(const copy_opt_t *co, ir_node *root, ir_node* arg, int pos);
/**
- * Generate the problem. Collect all infos and optimizable nodes.
+ * Statistics over a copy optimization module.
*/
-copy_opt_t *new_copy_opt(ir_graph *irg);
+typedef struct {
+ ulong64 aff_edges; /**< number of affinity edges. */
+ ulong64 aff_nodes; /**< number of nodes with incident affinity edges. */
+ ulong64 aff_int; /**< number of affinity edges whose nodes also interfere. */
+ ulong64 inevit_costs; /**< costs which cannot be evited (due to interfering affinities). */
+ ulong64 max_costs; /**< all costs of the affinities. */
+ ulong64 costs; /**< The costs of the current coloring. */
+ ulong64 unsatisfied_edges; /**< The number of unequally colored affinity edges. */
+} co_complete_stats_t;
/**
- * Free the space...
+ * Collect statistics of a copy optimization module.
+ * @param co The copy optimization environment.
+ * @param stat Where to put the stats.
+ * @note This requires the graph info to be computed.
*/
-void free_copy_opt(copy_opt_t *co);
+void co_complete_stats(const copy_opt_t *co, co_complete_stats_t *stat);
+
/**
- * Returns a lower bound for the number of copies needed based on interfering
- * arguments and the size of a max indep. set (only ifg-edges) of the other args.
+ * Build internal optimization units structure
*/
-int co_get_lower_bound(copy_opt_t *co);
+void co_build_ou_structure(copy_opt_t *co);
/**
- * Returns the number of arguments interfering with their root node. This also
- * is a (worse) lower bound for the number of copies needed.
+ * Frees the space used by the opt unit representation.
+ * Does NOT free the whole copyopt structure
*/
-int co_get_interferer_count(copy_opt_t *co);
+void co_free_ou_structure(copy_opt_t *co);
/**
* Solves the problem using a heuristic approach
+ * Uses the OU data structure
+ */
+int co_solve_heuristic(copy_opt_t *co);
+
+/**
+ * Apply Park/Moon coalescing to the graph.
+ * @param co The copy optimization data structure.
+ */
+void co_solve_park_moon(copy_opt_t *co);
+
+/**
+ * Solves the copy minimization problem using another heuristic approach.
+ * Uses the OU and the GRAPH data structure.
+ */
+int co_solve_heuristic_new(copy_opt_t *co);
+
+/**
+ * Solves the copy minimization problem using another heuristic approach implemented in Java.
+ * This function needs a JVM which is started to call the Java module.
+ * Uses the GRAPH data structure.
+ */
+int co_solve_heuristic_java(copy_opt_t *co);
+
+/**
+ * This is the pure C implementation of co_solve_heuristic_java().
+ */
+int co_solve_heuristic_mst(copy_opt_t *co);
+
+/**
+ * Returns the maximal costs possible, i.e. the costs if all
+ * pairs would be assigned different registers.
+ * Uses the OU data structure
+ */
+int co_get_max_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns the inevitable costs, i.e. the costs of
+ * all copy pairs which interfere.
+ * Uses the OU data structure
+ */
+int co_get_inevit_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns the current costs the copies are causing.
+ * The result includes inevitable costs and the costs
+ * of the copies regarding the current register allocation
+ * Uses the OU data structure
+ */
+int co_get_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns a lower bound for the costs of copies in this ou.
+ * The result includes inevitable costs and the costs of a
+ * minimal costs caused by the nodes of the ou.
+ * Uses the OU data structure
+ */
+int co_get_lower_bound(const copy_opt_t *co);
+
+/**
+ * Dump the interference graph according to the Appel/George coalescing contest file format.
+ * See: http://www.cs.princeton.edu/~appel/coalesce/format.html
+ * @note Requires graph structure.
+ * @param co The copy opt object.
+ * @param f A file to dump to.
+ */
+void co_dump_appel_graph(const copy_opt_t *co, FILE *f);
+
+/**
+ * Dumps the IFG of the program splitting after each instruction in the Appel format.
+ * @param co The copy opt object.
+ * @param f The file to dump to.
+ */
+void co_dump_appel_graph_cliques(const copy_opt_t *co, FILE *f);
+/**
+ * Dump the interference graph with the affinity edges and the coloring.
+ * @param co The copy opt structure.
+ * @param f The file to dump to.
+ * @param flags The dump flags (see enum above).
+ */
+void co_dump_ifg_dot(const copy_opt_t *co, FILE *f, unsigned flags);
+
+/**
+ * Constructs another internal representation of the affinity edges
+ */
+void co_build_graph_structure(copy_opt_t *co);
+
+/**
+ * Frees the space used by the graph representation.
+ * Does NOT free the whole copyopt structure
+ */
+void co_free_graph_structure(copy_opt_t *co);
+
+/**
+ * Solves the problem using mixed integer programming
+ * @returns 1 iff solution state was optimal
+ * NYI
*/
-void co_heur_opt(copy_opt_t *co);
+int co_solve_ilp1(copy_opt_t *co, double time_limit);
/**
* Solves the problem using mixed integer programming
+ * @returns 1 iff solution state was optimal
+ * Uses the OU and the GRAPH data structure
+ * Dependency of the OU structure can be removed
+ */
+int co_solve_ilp2(copy_opt_t *co);
+
+/**
+ * Checks if a node is optimizable, viz has something to do with coalescing.
+ * Uses the GRAPH data structure
*/
-void co_ilp_opt(copy_opt_t *co);
+int co_gs_is_optimizable(copy_opt_t *co, ir_node *irn);
-#endif
+#endif /* FIRM_BE_BECOPYOPT_H */
projects / libfirm / blobdiff