X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbesched_t.h;h=aeff538e356b2ab9302271544e782a974d0ff6c1;hb=333bc9c7aba2e2dbb8a3f108e73d6fd1c95dcc9f;hp=7ecc5830e23286e65b48db0de67aaa8435bbc030;hpb=9b060a71a2667ced8d103023eda0ff710e799867;p=libfirm diff --git a/ir/be/besched_t.h b/ir/be/besched_t.h index 7ecc5830e..aeff538e3 100644 --- a/ir/be/besched_t.h +++ b/ir/be/besched_t.h @@ -1,50 +1,124 @@ +/* + * 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. + */ -#ifndef _BESCHED_T_H -#define _BESCHED_T_H +/** + * @file + * @brief Scheduling utilities for nodes in Blocks and Blocks. + * @author Sebastian Hack + * @version $Id$ + */ +#ifndef FIRM_BE_BESCHED_T_H +#define FIRM_BE_BESCHED_T_H + +#define SCHED_INITIAL_GRANULARITY (1 << 14) #include "list.h" #include "irnode_t.h" #include "irgraph_t.h" +#include "irphase_t.h" +#include "irphases_t.h" +#include "beutil.h" #include "besched.h" +typedef unsigned int sched_timestep_t; + extern size_t sched_irn_data_offset; +/** + * The schedule structure which is present at each ir node. + * + * Currently, only basic blocks are scheduled. The list head of + * every block schedule list is the Block list. + */ typedef struct _sched_info_t { - struct list_head list; - int time_step; + struct list_head list; /**< The list head to list the nodes in a schedule. */ + unsigned idx; /**< The node index of the nodes this schedule info belongs to. */ + sched_timestep_t time_step; /**< If a is after b in a schedule, its time step is larger than b's. */ + unsigned scheduled : 1; /**< 1, if the node is in the schedule of the block, 0 else. */ } sched_info_t; -#define _sched_entry(list_head) (list_entry(list_head, sched_info_t, list)) +#define _sched_entry(list_head) (list_entry(list_head, sched_info_t, list)) +#define get_irn_sched_info(irn) ((sched_info_t *) get_or_set_irn_phase_info(skip_Proj_const(irn), PHASE_BE_SCHED)) +#define get_sched_info_irn(irg, sched_info) get_idx_irn((irg), (sched_info)->idx) -#define get_irn_sched_info(irn) get_irn_data(irn, sched_info_t, sched_irn_data_offset) -#define get_sched_info_irn(sched_info) get_irn_data_base(sched_info, sched_irn_data_offset) +/** + * Returns non-zero if schedule information is available + * for a given graph. + * @param irg The graph. + */ +static INLINE int _have_sched_info(const ir_graph *irg) +{ + return get_irg_phase(irg, PHASE_BE_SCHED) != NULL; +} /** - * Init the scheduling stuff. - * To be called from the central backend initialization routine. + * Check, if the node is scheduled. + * @param irn The node. + * @return 1, if the node is scheduled, 0 if not. */ -void be_sched_init(void); +static INLINE int _sched_is_scheduled(const ir_node *irn) +{ + return get_irn_sched_info(irn)->scheduled; +} /** * Get the time step of an irn in a schedule. * @param irn The node. * @return The time step in the schedule. */ -static INLINE int __sched_get_time_step(const ir_node *irn) +static INLINE int _sched_get_time_step(const ir_node *irn) { + assert(_sched_is_scheduled(irn)); return get_irn_sched_info(irn)->time_step; } +/** + * Checks, if a node is to appear in a schedule. Such nodes either + * consume real data (mode datab) or produce such. + * @param irn The node to check for. + * @return 1, if the node consumes/produces data, false if not. + */ +static INLINE int to_appear_in_schedule(const ir_node *irn) +{ + switch(get_irn_opcode(irn)) { + case iro_Start: + case iro_Jmp: + case iro_Break: + return 1; + case iro_Proj: + return 0; + default: + return is_data_node(irn); + } +} + /** * Check, if an ir_node has a scheduling successor. * @param irn The ir node. * @return 1, if the node has a scheduling successor, 0 if not. */ -static INLINE int __sched_has_succ(const ir_node *irn) +static INLINE int _sched_has_next(const ir_node *irn) { + const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn); const sched_info_t *info = get_irn_sched_info(irn); - const sched_info_t *block_info = get_irn_sched_info(get_nodes_block(irn)); + const sched_info_t *block_info = get_irn_sched_info(block); return info->list.next != &block_info->list; } @@ -53,60 +127,92 @@ static INLINE int __sched_has_succ(const ir_node *irn) * @param irn The ir node. * @return 1, if the node has a scheduling predecessor, 0 if not. */ -static INLINE int __sched_has_prev(const ir_node *irn) +static INLINE int _sched_has_prev(const ir_node *irn) { + const ir_node *block = is_Block(irn) ? irn : get_nodes_block(irn); const sched_info_t *info = get_irn_sched_info(irn); - const sched_info_t *block_info = get_irn_sched_info(get_nodes_block(irn)); + const sched_info_t *block_info = get_irn_sched_info(block); return info->list.prev != &block_info->list; } /** * Get the scheduling successor of a node. * @param irn The node. - * @return The next ir node in the schedule or NULL, if this node has no - * successor. + * @return The next ir node in the schedule or the block, if the node has no next node. */ -static INLINE const ir_node *__sched_succ(const ir_node *irn) +static INLINE ir_node *_sched_next(const ir_node *irn) { const sched_info_t *info = get_irn_sched_info(irn); - return __sched_has_succ(irn) ? get_sched_info_irn(_sched_entry(info->list.next)) : NULL; + return get_sched_info_irn(get_irn_irg(irn), _sched_entry(info->list.next)); } /** * Get the scheduling predecessor of a node. * @param irn The node. - * @return The next ir node in the schedule or NULL, if this node has no + * @return The next ir node in the schedule or the block, if the node has no predecessor. * predecessor. */ -static INLINE const ir_node *__sched_prev(const ir_node *irn) +static INLINE ir_node *_sched_prev(const ir_node *irn) { const sched_info_t *info = get_irn_sched_info(irn); - return __sched_has_prev(irn) ? get_sched_info_irn(_sched_entry(info->list.prev)) : NULL; + return get_sched_info_irn(get_irn_irg(irn), _sched_entry(info->list.prev)); } /** * Get the first node in a block schedule. * @param block The block of which to get the schedule. - * @return The first node in the schedule or NULL if there is none. + * @return The first node in the schedule or the block itself + * if there is no node in the schedule. */ -static INLINE const ir_node *__sched_first(const ir_node *block) +static INLINE ir_node *_sched_first(const ir_node *block) { - const sched_info_t *info = get_irn_sched_info(block); assert(is_Block(block) && "Need a block here"); - return !list_empty(&info->list) ? get_sched_info_irn(_sched_entry(info->list.next)) : NULL; + return _sched_next(block); } /** * Get the last node in a schedule. - * @param block The block to get the schedule for. - * @return The last ir node in a schedule, or NULL if no schedule exists - * or it is empty. + * @param block The block to get the schedule for. + * @return The last ir node in a schedule, or the block itself + * if there is no node in the schedule. */ -static INLINE const ir_node *__sched_last(const ir_node *block) +static INLINE ir_node *_sched_last(const ir_node *block) { - const sched_info_t *info = get_irn_sched_info(block); assert(is_Block(block) && "Need a block here"); - return !list_empty(&info->list) ? get_sched_info_irn(_sched_entry(info->list.prev)) : NULL; + return _sched_prev(block); +} + +/** + * Reassign the time steps in the schedule. + * @param block The schedule to update. + */ +void sched_renumber(const ir_node *block); + +static INLINE void _sched_set_time_stamp(const ir_node *irn) +{ + sched_info_t *inf = get_irn_sched_info(irn); + sched_timestep_t before_ts = _sched_entry(inf->list.prev)->time_step; + sched_timestep_t after_ts = _sched_entry(inf->list.next)->time_step; + + /* + * If we are the last, we can give us a big time step, + * else we have to compute our time step from our + * neighbours. + */ + if(before_ts >= after_ts) + inf->time_step = before_ts + SCHED_INITIAL_GRANULARITY; + else { + sched_timestep_t ts = (before_ts + after_ts) / 2; + + /* + * If the resolution went out, we have to renumber + * this block. + */ + if(ts == before_ts || ts == after_ts) + sched_renumber(get_nodes_block(irn)); + else + inf->time_step = ts; + } } /** @@ -115,21 +221,142 @@ static INLINE const ir_node *__sched_last(const ir_node *block) * @param irn The node to add. * @return The given node. */ -static INLINE const ir_node *__sched_add(ir_node *block, const ir_node *irn) +static INLINE void _sched_add_before(const ir_node *before, const ir_node *irn) { - assert(is_Block(block) && "Need a block here"); - list_add_tail(&get_irn_sched_info(irn)->list, &get_irn_sched_info(block)->list); - return irn; + sched_info_t *info = get_irn_sched_info(irn); + assert(_sched_is_scheduled(before)); + assert(!_sched_is_scheduled(irn)); + assert(!is_Proj(irn)); + list_add_tail(&info->list, &get_irn_sched_info(before)->list); + _sched_set_time_stamp(irn); + info->scheduled = 1; +} + +/** + * Add a node to a block schedule. + * @param block The block to whose schedule the node shall be added to. + * @param irn The node to add. + * @return The given node. + */ +static INLINE void _sched_add_after(const ir_node *after, const ir_node *irn) +{ + sched_info_t *info = get_irn_sched_info(irn); + assert(_sched_is_scheduled(after)); + assert(!_sched_is_scheduled(irn)); + assert(!is_Proj(irn)); + list_add(&info->list, &get_irn_sched_info(after)->list); + _sched_set_time_stamp(irn); + info->scheduled = 1; +} + +static INLINE void _sched_init_block(const ir_node *block) +{ + sched_info_t *info = get_irn_sched_info(block); + assert(info->scheduled == 0 && info->time_step == 0); + INIT_LIST_HEAD(&info->list); + info->scheduled = 1; +} + +static INLINE void _sched_reset(const ir_node *node) +{ + sched_info_t *info = get_irn_sched_info(node); + info->scheduled = 0; +} + +/** + * Remove a node from the scheduled. + * @param irn The node. + */ +static INLINE void _sched_remove(const ir_node *irn) +{ + sched_info_t *info = get_irn_sched_info(irn); + list_del(&info->list); + INIT_LIST_HEAD(&info->list); + info->scheduled = 0; +} + +/** + * Compare two nodes according to their position in the schedule. + * @param a The first node. + * @param b The second node. + * @return A number smaller, equals to or larger than 0, if a is + * before, the same, or after b in the schedule. + */ +static INLINE int _sched_cmp(const ir_node *a, const ir_node *b) +{ + assert(_sched_is_scheduled(a) && _sched_is_scheduled(b)); + assert(get_nodes_block(a) == get_nodes_block(b)); + + return get_irn_sched_info(a)->time_step - get_irn_sched_info(b)->time_step; } -#define sched_get_time_step(irn) __sched_get_time_step(irn) -#define sched_has_succ(irn) __sched_has_succ(irn) -#define sched_has_prev(irn) __sched_has_prev(irn) -#define sched_succ(irn) __sched_succ(irn) -#define sched_prev(irn) __sched_prev(irn) -#define sched_first(irn) __sched_first(irn) -#define sched_last(irn) __sched_last(irn) -#define sched_add(block,irn) __sched_add(block,irn) +/** + * Checks, if one node is scheduled before another. + * @param n1 A node. + * @param n2 Another node. + * @return 1, if n1 is in front of n2 in the schedule, 0 else. + * @note Both nodes must be in the same block. + */ +static INLINE int _sched_comes_after(const ir_node *n1, const ir_node *n2) +{ + assert(_sched_is_scheduled(n1)); + assert(_sched_is_scheduled(n2)); + assert(get_nodes_block(n1) == get_nodes_block(n2)); + return _sched_get_time_step(n1) < _sched_get_time_step(n2); +} + +/** + * A predicate for a node. + * @param irn The node. + * @param data The custom data. + * @return 1 if irn should be skipped. Else 0. + */ +typedef int (sched_predicator_t)(const ir_node *irn, void *data); + +/** + * Predicate for sched_skip(), returns non-zero if irn is a control flow changing node. + * + * @param irn the node to evaluate + * @param data an arch_env_t * used to determine if irn is a cf + * node for the given architecture + */ +int sched_skip_cf_predicator(const ir_node *irn, void *data); + +/** + * Predicate for sched_skip(), returns non-zero if irn is a Phi node. + * + * Used with sched_skip(). + * + * @param irn the node to evaluate + * @param data unused + */ +int sched_skip_phi_predicator(const ir_node *irn, void *data); + +/** + * Skip nodes in a schedule. + * @param from The node to start from. + * @param forward The direction (1 for forward, 0 for backward). + * @param predicator The predicator function which decides what is skipped. + * @param data context parameter for the predicator. + * + * @return The first node not rejected by the predicator or the block + * itself if all nodes were rejected. + */ +ir_node *sched_skip(ir_node *from, int forward, sched_predicator_t *predicator, void *data); +#define have_sched_info(irg) _have_sched_info(irg) +#define sched_get_time_step(irn) _sched_get_time_step(irn) +#define sched_has_next(irn) _sched_has_next(irn) +#define sched_has_prev(irn) _sched_has_prev(irn) +#define sched_next(irn) _sched_next(irn) +#define sched_prev(irn) _sched_prev(irn) +#define sched_first(irn) _sched_first(irn) +#define sched_last(irn) _sched_last(irn) +#define sched_add_before(before, irn) _sched_add_before(before, irn) +#define sched_add_after(after, irn) _sched_add_after(after, irn) +#define sched_remove(irn) _sched_remove(irn) +#define sched_is_scheduled(irn) _sched_is_scheduled(irn) +#define sched_comes_after(n1, n2) _sched_comes_after(n1, n2) +#define sched_cmp(a, b) _sched_cmp(a, b) -#endif +#endif /* FIRM_BE_BESCHED_T_H */