X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbecopyopt.h;h=c245e10b3f7787f58972fae108fce8be4d48ff1c;hb=ca1b1615fbe23a4d5cf72e7be5d2ee831615cbc2;hp=e60d4b4bd35e6ad8dc44c7c21834335bed0779ee;hpb=8ccaa22c4f8f4585c5989bee969a75b7ac974032;p=libfirm diff --git a/ir/be/becopyopt.h b/ir/be/becopyopt.h index e60d4b4bd..c245e10b3 100644 --- a/ir/be/becopyopt.h +++ b/ir/be/becopyopt.h @@ -1,138 +1,149 @@ /** * 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); -#include "beutil.h" -#include "benumb_t.h" -#include "belive_t.h" -#include "bechordal_t.h" -#include "bearch.h" +typedef int(*cost_fct_t)(ir_node*, ir_node*, int); -#define DEBUG_IRG "NONE spec.c__main__datab" -#define DEBUG_LVL_CO LEVEL_1 -#define DEBUG_LVL_HEUR LEVEL_1 -#define DEBUG_LVL_ILP LEVEL_1 +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 */ - 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 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 ifg_mis_size; /**< size of a mis considering only ifg (not coloring conflicts) */ - - /* for heuristic */ - struct list_head queue; /**< list of (mis/color) sorted by size of 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)) +void free_copy_opt(copy_opt_t *co); -#define get_irn_col(co, irn) \ - arch_register_get_index(arch_get_irn_register(co->chordal_env->arch_env, irn, 0)) +/** + * 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 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 + * Build internal optimization units structure */ -#define is_Copy(arch_env, irn) (is_Proj(irn) && is_Perm(arch_env, get_Proj_pred(irn))) +void co_build_ou_structure(copy_opt_t *co); /** - * returns the corresponding argument of the perm node for a copy + * Frees the space used by the opt unit representation. + * Does NOT free the whole copyopt structure */ -#define get_Copy_src(irn) (get_irn_n(get_Proj_pred(irn), get_Proj_proj(irn))) +void co_free_ou_structure(copy_opt_t *co); /** - * Checks if a node is optimizable, viz. is a target of a 'copy-op' + * Solves the problem using a heuristic approach + * Uses the OU data structure */ -#define is_optimizable(arch_env, irn) (is_Phi(irn) || is_Copy(arch_env, irn)) +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. + * Uses the OU data structure */ -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 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 number of copies needed + * 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_count(const copy_opt_t *co); +int co_get_copy_costs(const copy_opt_t *co); /** - * 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 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); + + + + /** - * 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 + * 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 */ -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 something to do with coalescing. + * Uses the GRAPH data structure */ -void co_check_allocation(copy_opt_t *co); +int co_gs_is_optimizable(copy_opt_t *co, ir_node *irn); -#endif +#endif /* _BECOPYOPT_H */