X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbelistsched.h;h=f3a971b6902ae59a8671ce80e0bd6347d46eb44f;hb=ccdf802c598f7adc5e35fff42fed029c59f48a57;hp=f4fb4cf70a6a7a12eeb586efbc765233a59c9f8e;hpb=d26125ca5720072a4975d37c0a17f7ad6c18de2d;p=libfirm diff --git a/ir/be/belistsched.h b/ir/be/belistsched.h index f4fb4cf70..f3a971b69 100644 --- a/ir/be/belistsched.h +++ b/ir/be/belistsched.h @@ -1,52 +1,178 @@ +/* + * 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. + */ + /** - * Primitive list scheduling. - * @date 20.10.2004 - * @author Sebastian Hack + * @file + * @brief Primitive list scheduling with different node selectors. + * @author Sebastian Hack + * @date 20.10.2004 + * @version $Id$ */ +#ifndef FIRM_BE_BELISTSCHED_H +#define FIRM_BE_BELISTSCHED_H -#ifndef _FIRM_LIST_SCHED -#define _FIRM_LIST_SCHED +#include "firm_types.h" +#include "irnodeset.h" -#include "pset.h" -#include "pmap.h" -#include "list.h" +#include "be.h" +#include "bearch.h" +#include "beirg.h" -#include "besched_t.h" +typedef struct _list_sched_selector_t list_sched_selector_t; /** - * The selection function. - * It picks one node out of the ready list to be scheduled next. - * The function does not have to delete the node from the ready set. - * - * @param env Some private information as passed to list_schedule(). - * @param block The block which is currentliy scheduled. - * @param curr_time The current time step which the picked node - * will be assigned to. - * @param already_scheduled A set containing all nodes already - * scheduled. - * @param ready_list A set containing all ready nodes. Pick one of these - * nodes. - * @return The chosen node. + * A selector interface which is used by the list schedule framework. + * You can implement your own list scheduler by implementing these + * functions. + */ +struct _list_sched_selector_t { + + /** + * Called before a graph is being scheduled. + * @param vtab The selector vtab. + * @param birg The backend graph. + * @return The environment pointer that is passed to all other functions in this struct. + */ + void *(*init_graph)(const list_sched_selector_t *vtab, const be_irg_t *birg); + + /** + * Called before scheduling starts on a block. + * @param graph_env The environment. + * @param block The block which is to be scheduled. + * @return A per-block pointer that is additionally passed to select. + */ + void *(*init_block)(void *graph_env, ir_node *block); + + /** + * The selection function. + * It picks one node out of the ready list to be scheduled next. + * The function does not have to delete the node from the ready set. + * + * @param block_env Some private information as returned by init_block(). + * @param sched_head The schedule so far. + * @param ready_set A set containing all ready nodes. Pick one of these nodes. + * @param live_set A set containing all nodes currently alive. + * @return The chosen node. + */ + ir_node *(*select)(void *block_env, ir_nodeset_t *ready_set, + ir_nodeset_t *live_set); + + /** + * This function decides, if a node should appear in a schedule. + * @param block_env The block environment. + * @param irn The node. + * @return 1, if the node should be scheduled, 0 if not. + */ + int (*to_appear_in_schedule)(void *block_env, const ir_node *irn); + + /** + * This function gets executed after a node finally has been made ready. + * @param block_env The block environment. + * @param irn The node made ready. + * @param pred The previously scheduled node. + */ + void (*node_ready)(void *block_env, ir_node *irn, ir_node *pred); + + /** + * This function gets executed after a node finally has been selected. + * @param block_env The block environment. + * @param irn The selected node. + */ + void (*node_selected)(void *block_env, ir_node *irn); + + /** + * Returns the execution time of node irn. + */ + unsigned (*exectime)(void *block_env, const ir_node *irn); + + /** + * Calculates the latency of executing cycle curr_cycle of node curr in cycle pred_cycle + * of node pred. + * + * @param block_env The block environment. + * @param pred The previous node. + * @param pred_cycle The previous node execution cycle. + * @param curr The current node. + * @param curr_cycle The current node execution cycle. + */ + unsigned (*latency)(void *block_env, const ir_node *pred, int pred_cycle, const ir_node *curr, int curr_cycle); + + /** + * Called after a block has been scheduled. + * @param env The environment. + * @param block_env The per block environment as returned by init_block(). + */ + void (*finish_block)(void *block_env); + + /** + * Called after a whole graph has been scheduled. + * @param env The environment. + */ + void (*finish_graph)(void *env); + +}; + + +/** + * A trivial selector, that just selects the first ready node. + */ +extern const list_sched_selector_t trivial_selector; + +extern const list_sched_selector_t random_selector; + +/** + * A selector that tries to minimize the register pressure. + * @note Not really operational yet. */ -typedef ir_node *(list_sched_selector_t)(void *env, ir_node *block, - int curr_time, pset *already_scheduled, pset *ready_list); +extern const list_sched_selector_t reg_pressure_selector; -ir_node *trivial_selector(void *env, ir_node *block, int curr_time, - pset *already_scheduled, pset *ready_list); +/** + * A selector based on trace scheduling as introduced by Muchnik[TM] + */ +extern const list_sched_selector_t muchnik_selector; + +/** + * A selector based on trace scheduling as introduced by Muchnik[TM] + * but using the mueller heuristic selector. + */ +extern const list_sched_selector_t heuristic_selector; + +/** + * A selector based on the strong normal form theorem + */ +extern const list_sched_selector_t normal_selector; /** * List schedule a graph. * Each block in the graph gets a list head to its link field being the * head of the schedule. You can walk this list using the functions in * list.h. - * @param irg The graph to schedule. - * @param sched_obst An obstack to allocate the lists on. - * @param map Maps each block to a list head giving the schedule. - * @param select_func A selection function. - * @param env Some private data to give to the select function. + * + * @param birg The backend irg. + * @param be_opts The backend options */ -void list_sched(ir_graph *irg, list_sched_selector_t *select_func, void *env); - +void list_sched(be_irg_t *birg, be_options_t *be_opts); +/** + * List schedule a block. + * Same as list_sched but only for a certain block (needed for ILP fallback). + */ +void list_sched_single_block(const be_irg_t *birg, ir_node *block, be_options_t *be_opts); -#endif +#endif /* FIRM_BE_BELISTSCHED_H */