X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbecopyopt.h;h=988df82da3c8b07598e581ad2bbf16af063b1a30;hb=4d7a9507baf1737297cd4f7fc91eab209fd5d398;hp=8e7654779621d37ec599a9f99a0cc56c7bd90427;hpb=48398403237b6bbc2e7d6fb46e22cff0f1d2d032;p=libfirm diff --git a/ir/be/becopyopt.h b/ir/be/becopyopt.h index 8e7654779..988df82da 100644 --- a/ir/be/becopyopt.h +++ b/ir/be/becopyopt.h @@ -1,150 +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 "irgraph.h" -#include "irgwalk.h" -#include "irnode.h" -#include "irdom.h" -#include "irouts.h" - -#include "beutil.h" -#include "benumb_t.h" -#include "belive_t.h" -#include "bechordal_t.h" -#include "bearch.h" - -#define DEBUG_IRG "MergeSort.c__merge__datab" -#define DEBUG_IRG_LVL_CO SET_LEVEL_1 -#define DEBUG_IRG_LVL_HEUR SET_LEVEL_1 -#define DEBUG_IRG_LVL_ILP SET_LEVEL_1 -#define DEBUG_LVL_CO SET_LEVEL_0 -#define DEBUG_LVL_HEUR SET_LEVEL_0 -#define DEBUG_LVL_ILP SET_LEVEL_0 +#include "firm_types.h" +#include "bechordal.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; + /** - * Data representing the problem of copy minimization. + * Generate the problem. Collect all information and optimizable nodes. */ -typedef struct _copy_opt_t { - be_chordal_env_t *chordal_env; - char *name; /**< ProgName__IrgName__RegClass */ - struct list_head units; /**< all units to optimize in right order */ - pset *roots; /**< used only temporary for detecting multiple appends */ - cost_fct_t get_costs; /**< function ptr used to get costs for copies */ - struct obstack ob; -} copy_opt_t; +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 */ - copy_opt_t *co; /**< the copy_opt this unit belongs to */ - int node_count; /**< size of the nodes array */ - ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */ - int *costs; /**< costs[i] are arising, if nodes[i] has a different color */ - int all_nodes_costs; /**< sum of all costs[i] */ - int min_nodes_costs; /**< a lower bound for this ou, considering only ifg (not coloring conflicts) */ - int sort_key; /**< maximum costs. controls the order of ou's in the struct list_head units. */ - - /* for heuristic */ - struct list_head queue; /**< list of qn's sorted by weight of qn-mis */ -} unit_t; - -/* Helpers */ -#define set_irn_col(co, irn, col) \ - arch_set_irn_register(co->chordal_env->arch_env, irn, 0, arch_register_for_index(co->chordal_env->cls, col)) - -#define get_irn_col(co, irn) \ - arch_register_get_index(arch_get_irn_register(co->chordal_env->arch_env, irn, 0)) +void free_copy_opt(copy_opt_t *co); -#define list_entry_units(lh) list_entry(lh, unit_t, units) +/** + * 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); +/** + * Checks if the irn is a non-interfering argument of a node which 'is_optimizable' + */ +int co_is_optimizable_arg(const copy_opt_t *co, ir_node *irn); /** - * Generate the problem. Collect all infos and optimizable nodes. + * 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. */ -copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, int (*get_costs)(ir_node*, ir_node*, int)); +int co_get_costs_loop_depth(ir_node *root, ir_node* arg, int pos); /** - * Free the space... + * All costs equal 1. Using this will reduce the _number_ of copies. + * @return Must be >= 0 in all cases. */ -void free_copy_opt(copy_opt_t *co); +int co_get_costs_all_one(ir_node *root, ir_node* arg, int pos); -#define is_Perm(arch_env, irn) (arch_irn_classify(arch_env, irn) == arch_irn_class_perm) -/** - * A copy is a proj haning out of perm node - */ -#define is_Copy(arch_env, irn) (is_Proj(irn) && is_Perm(arch_env, get_Proj_pred(irn))) /** - * returns the corresponding argument of the perm node for a copy + * Build internal optimization units structure */ -#define get_Copy_src(irn) (get_irn_n(get_Proj_pred(irn), get_Proj_proj(irn))) +void co_build_ou_structure(copy_opt_t *co); /** - * Checks if a node is optimizable, viz. is a target of a 'copy-op' + * Frees the space used by the opt unit representation. + * Does NOT free the whole copyopt structure */ -#define is_optimizable(arch_env, irn) (is_Phi(irn) || is_Copy(arch_env, irn)) +void co_free_ou_structure(copy_opt_t *co); /** - * Checks if the irn is a non-interfering argument of a node which 'is_optimizable' + * Solves the problem using a heuristic approach */ -int is_optimizable_arg(const copy_opt_t *co, ir_node *irn); +int co_solve_heuristic(copy_opt_t *co); /** - * Computes the costs of a copy according to loop depth - * @param root, arg: clear. - * @param pos: -1 for perm-copies. - * Else the argument position of arg in the phi node root. - * @return Must be >= 0 in all cases. + * Returns the maximal costs possible, i.e. the costs if all + * pairs would be assigned different registers. */ -int get_costs_loop_depth(ir_node *root, ir_node* arg, int pos); +int co_get_max_copy_costs(const copy_opt_t *co); /** - * All costs equal 1. Using this will reduce the number of copies. - * @return Must be >= 0 in all cases. + * Returns the inevitable costs, i.e. the costs of + * all copy pairs which interfere. */ -int get_costs_all_one(ir_node *root, ir_node* arg, int pos); +int co_get_inevit_copy_costs(const copy_opt_t *co); /** - * Returns the current costs the copies are causing + * 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 based on interfering - * arguments and the size of a max indep. set (only ifg-edges) of the other args. + * 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); + + + + /** - * Solves the problem using a heuristic approach + * Constructs another internal representation of the affinity edges */ -void co_heur_opt(copy_opt_t *co); +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 + */ +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 + */ +int co_solve_ilp2(copy_opt_t *co, double time_limit); + +/** + * Checks if a node is optimizable, viz. has somthing to do with coalescing. + * Uses the graph representation */ -void co_ilp_opt(copy_opt_t *co); +int co_gs_is_optimizable(copy_opt_t *co, ir_node *irn); -#endif +#endif /* _BECOPYOPT_H */