X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbecopyopt.h;h=988df82da3c8b07598e581ad2bbf16af063b1a30;hb=7438ae082c9ec7658ccd006b40aa62084aedca2d;hp=632c6b27aa1b953abc82f05b3abd092d6da91ce4;hpb=165e48ff9dc8753e95565ddf6c58b3f128490406;p=libfirm diff --git a/ir/be/becopyopt.h b/ir/be/becopyopt.h index 632c6b27a..988df82da 100644 --- a/ir/be/becopyopt.h +++ b/ir/be/becopyopt.h @@ -1,125 +1,141 @@ /** * Author: Daniel Grund - * Date: 12.04.2005 + * Date: 11.04.2005 * Copyright: (c) Universitaet Karlsruhe * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. * - * Header for copy optimization problem. Analysis and set up of the problem. + * Main file for the optimization reducing the copies needed for: + * - Phi coalescing + * - Register-constrained nodes + * - Two-address code instructions */ #ifndef _BECOPYOPT_H #define _BECOPYOPT_H -#include "debug.h" -#include "obst.h" -#include "list.h" -#include "set.h" -#include "pset.h" -#include "bitset.h" -#include "sp_matrix.h" +#include "firm_types.h" +#include "bechordal.h" -#include "irgraph.h" -#include "irgwalk.h" -#include "irnode.h" -#include "irdom.h" -#include "irouts.h" +/** + * Has to be called during the firm init phase + */ +void be_copy_opt_init(void); + +typedef int(*cost_fct_t)(ir_node*, ir_node*, int); + +typedef struct _copy_opt_t copy_opt_t; -#include "beutil.h" -#include "benumb_t.h" -#include "belive_t.h" -#include "bechordal_t.h" -#include "bearch.h" +/** + * Generate the problem. Collect all information and optimizable nodes. + */ +copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, cost_fct_t get_costs); + +/** + * Free the space used... + */ +void free_copy_opt(copy_opt_t *co); -/* TODO is_Copy */ -#define is_Copy(irn) 0 -#define DEBUG_IRG "-scanner.c__init_td__gp" +/** + * 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. + * Checks if the irn is a non-interfering argument of a node which 'is_optimizable' */ -typedef struct _copy_opt_t { - be_chordal_env_t *chordal_env; - ir_graph *irg; /**< the irg to process */ - char *name; /**< ProgName__IrgName__RegClass */ - const arch_env_t *env; /**< Environment (isa + handlers) */ - const arch_register_class_t *cls; /**< the registerclass all nodes belong to (in this pass) */ - struct list_head units; /**< all units to optimize in right order */ - pset *roots; /**< used only temporary for detecting multiple appends */ - struct obstack ob; -} copy_opt_t; +int co_is_optimizable_arg(const copy_opt_t *co, ir_node *irn); /** - * A single unit of optimization. Lots of these form a copy-opt problem + * Computes the costs of a copy according to loop depth + * @param pos: the argument position of arg in the root arguments + * @return Must be >= 0 in all cases. */ -typedef struct _unit_t { - struct list_head units; /**< chain for all units */ - copy_opt_t *co; /**< the copy_opt this unit belongs to */ - int interf; /**< number of nodes dropped due to interference */ - int node_count; /**< size of the nodes array */ - ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */ +int co_get_costs_loop_depth(ir_node *root, ir_node* arg, int pos); - /* 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; +/** + * All costs equal 1. Using this will reduce the _number_ of copies. + * @return Must be >= 0 in all cases. + */ +int co_get_costs_all_one(ir_node *root, ir_node* arg, int pos); -/* Helpers */ -#define set_irn_col(co, irn, col) \ - arch_set_irn_register(co->env, irn, 0, arch_register_for_index(co->cls, col)) -#define get_irn_col(co, irn) \ - arch_register_get_index(arch_get_irn_register(co->env, irn, 0)) /** - * Generate the problem. Collect all infos and optimizable nodes. + * Build internal optimization units structure */ -copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, - const arch_env_t *env, const arch_register_class_t *cls); +void co_build_ou_structure(copy_opt_t *co); /** - * Free the space... + * Frees the space used by the opt unit representation. + * Does NOT free the whole copyopt structure */ -void free_copy_opt(copy_opt_t *co); +void co_free_ou_structure(copy_opt_t *co); -#define is_optimizable(irn) (is_Phi(irn) || is_Copy(irn)) +/** + * Solves the problem using a heuristic approach + */ +int co_solve_heuristic(copy_opt_t *co); /** - * Checks if the irn is a non-interfering argument of a node which 'is_optimizable' + * Returns the maximal costs possible, i.e. the costs if all + * pairs would be assigned different registers. */ -int is_optimizable_arg(const copy_opt_t *co, ir_node *irn); +int co_get_max_copy_costs(const copy_opt_t *co); /** - * Returns the current number of copies needed + * Returns the inevitable costs, i.e. the costs of + * all copy pairs which interfere. */ -int co_get_copy_count(const copy_opt_t *co); +int co_get_inevit_copy_costs(const copy_opt_t *co); /** - * IMPORTANT: Available only iff heuristic has run! - * 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. + * Returns the current costs the copies are causing. + * The result includes inevitable costs and the costs + * of the copies regarding the current register allocation + */ +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. */ int co_get_lower_bound(const 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. + * Constructs another internal representation of the affinity edges */ -int co_get_interferer_count(const copy_opt_t *co); +void co_build_graph_structure(copy_opt_t *co); /** - * Solves the problem using a heuristic approach + * 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 */ -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 */ -void co_ilp_opt(copy_opt_t *co); +int co_solve_ilp2(copy_opt_t *co, double time_limit); /** - * Checks the register allocation for correctness + * Checks if a node is optimizable, viz. has somthing to do with coalescing. + * Uses the graph representation */ -void co_check_allocation(copy_opt_t *co); +int co_gs_is_optimizable(copy_opt_t *co, ir_node *irn); -#endif +#endif /* _BECOPYOPT_H */