+/*
+ * Copyright (C) 1995-2011 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.
+ */
+
/**
* @file
* @brief Handles state switching. This is basically the belady spill
* algorithm optimized for the 1-register case.
* @author Matthias Braun
* @date 26.03.2007
- * @version $Id$
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include "bestate.h"
#include "iredges_t.h"
#include "ircons_t.h"
#include "irgmod.h"
-
-#include "bearch_t.h"
-#include "beuses_t.h"
-#include "besched_t.h"
+#include "irnodeset.h"
+#include "irnodehashmap.h"
+#include "cpset.h"
+
+#include "bearch.h"
+#include "beirg.h"
+#include "beuses.h"
+#include "besched.h"
#include "belive_t.h"
#include "bemodule.h"
-#include "benode_t.h"
+#include "benode.h"
+#include "beirgmod.h"
#include "bessaconstr.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
typedef struct minibelady_env_t {
struct obstack obst;
- const arch_env_t *arch_env;
const arch_register_t *reg;
const be_lv_t *lv;
void *func_env;
create_reload_func create_reload;
create_spill_func create_spill;
spill_info_t *spills;
+ ir_nodehashmap_t spill_infos;
be_uses_t *uses; /**< env for the next-use magic */
} minibelady_env_t;
ir_node *end_state;
} block_info_t;
-static INLINE
-block_info_t *new_block_info(struct obstack *obst, ir_node *block)
+static inline block_info_t *new_block_info(struct obstack *obst, ir_node *block)
{
- block_info_t *res = obstack_alloc(obst, sizeof(*res));
- memset(res, 0, sizeof(res[0]));
+ block_info_t *res = OALLOCZ(obst, block_info_t);
+ assert(is_Block(block));
set_irn_link(block, res);
mark_irn_visited(block);
return res;
}
-static INLINE
-block_info_t *get_block_info(ir_node *block)
+static inline block_info_t *get_block_info(ir_node *block)
{
assert(irn_visited(block));
return (block_info_t*) get_irn_link(block);
}
-static INLINE
-spill_info_t *create_spill_info(minibelady_env_t *env, ir_node *state)
+static inline spill_info_t *create_spill_info(minibelady_env_t *env, ir_node *state)
{
- spill_info_t *spill_info = obstack_alloc(&env->obst, sizeof(spill_info[0]));
- memset(spill_info, 0, sizeof(spill_info[0]));
+ spill_info_t *spill_info = OALLOCZ(&env->obst, spill_info_t);
spill_info->value = state;
spill_info->reloads = NEW_ARR_F(ir_node*, 0);
- set_irn_link(state, spill_info);
- mark_irn_visited(state);
+ ir_nodehashmap_insert(&env->spill_infos, state, spill_info);
+ //ir_fprintf(stderr, "Insert %+F -> %p\n", state, spill_info);
spill_info->next = env->spills;
env->spills = spill_info;
return spill_info;
}
-static
-spill_info_t *create_spill(minibelady_env_t *env, ir_node *state, int force)
+static inline spill_info_t *get_spill_info(minibelady_env_t *env, const ir_node *node)
+{
+ spill_info_t *spill_info = ir_nodehashmap_get(spill_info_t, &env->spill_infos, node);
+ //ir_fprintf(stderr, "Get %+F -> %p\n", node, spill_info);
+ return spill_info;
+}
+
+static spill_info_t *create_spill(minibelady_env_t *env, ir_node *state, int force)
{
spill_info_t *spill_info;
ir_node *next;
ir_node *after;
- if(irn_visited(state)) {
- spill_info = (spill_info_t*) get_irn_link(state);
- if(spill_info->spill != NULL || !force)
- return spill_info;
- } else {
+ spill_info = get_spill_info(env, state);
+ if (spill_info == NULL) {
spill_info = create_spill_info(env, state);
+ } else if (spill_info->spill != NULL) {
+ return spill_info;
}
- if(sched_is_scheduled(state)) {
+ if (sched_is_scheduled(state)) {
next = state;
do {
after = next;
next = sched_next(after);
- } while(is_Proj(next) || is_Phi(next) || be_is_Keep(next));
+ } while (is_Proj(next) || is_Phi(next) || be_is_Keep(next));
} else {
after = state;
}
return spill_info;
}
-static
-void create_reload(minibelady_env_t *env, ir_node *state, ir_node *before,
- ir_node *last_state)
+static void create_reload(minibelady_env_t *env, ir_node *state,
+ ir_node *before, ir_node *last_state)
{
spill_info_t *spill_info = create_spill(env, state, 0);
ir_node *spill = spill_info->spill;
ARR_APP1(ir_node*, spill_info->reloads, reload);
}
-static
-void spill_phi(minibelady_env_t *env, ir_node *phi)
+static void spill_phi(minibelady_env_t *env, ir_node *phi)
{
- ir_graph *irg = get_irn_irg(phi);
- ir_node *block = get_nodes_block(phi);
- int i, arity = get_irn_arity(phi);
- ir_node **in = alloca(arity * sizeof(in[0]));
- ir_node *spill_to_kill = NULL;
+ ir_graph *irg = get_irn_irg(phi);
+ ir_node *block = get_nodes_block(phi);
+ int arity = get_irn_arity(phi);
+ ir_node **phi_in = ALLOCAN(ir_node*, arity);
+ ir_node *dummy = new_r_Dummy(irg, mode_M);
+ ir_node *spill_to_kill = NULL;
spill_info_t *spill_info;
+ int i;
/* does a spill exist for the phis value? */
- if(irn_visited(phi)) {
- spill_info = (spill_info_t*) get_irn_link(phi);
+ spill_info = get_spill_info(env, phi);
+ if (spill_info != NULL) {
spill_to_kill = spill_info->spill;
} else {
spill_info = create_spill_info(env, phi);
}
/* create a new phi-M with bad preds */
- for(i = 0; i < arity; ++i) {
- in[i] = new_r_Bad(irg);
+ for (i = 0; i < arity; ++i) {
+ phi_in[i] = dummy;
}
DBG((dbg, LEVEL_2, "\tcreate Phi-M for %+F\n", phi));
/* create a Phi-M */
- spill_info->spill = new_r_Phi(irg, block, arity, in, mode_M);
+ spill_info->spill = be_new_Phi(block, arity, phi_in, mode_M,
+ arch_no_register_req);
+ sched_add_after(block, spill_info->spill);
- if(spill_to_kill != NULL) {
+ if (spill_to_kill != NULL) {
exchange(spill_to_kill, spill_info->spill);
sched_remove(spill_to_kill);
}
/* create spills for the phi values */
- for(i = 0; i < arity; ++i) {
+ for (i = 0; i < arity; ++i) {
ir_node *in = get_irn_n(phi, i);
spill_info_t *pred_spill = create_spill(env, in, 1);
set_irn_n(spill_info->spill, i, pred_spill->spill);
}
}
-static
-void belady(minibelady_env_t *env, ir_node *block);
+static void belady(minibelady_env_t *env, ir_node *block);
/**
* Collects all values live-in at block @p block and all phi results in this
* block.
* Then it adds the best values (at most n_regs) to the blocks start_workset.
- * The phis among the remaining values get spilled: Introduce psudo-copies of
+ * The phis among the remaining values get spilled: Introduce pseudo-copies of
* their args to break interference and make it possible to spill them to the
* same spill slot.
*/
-static
-block_info_t *compute_block_start_state(minibelady_env_t *env, ir_node *block)
+static block_info_t *compute_block_start_state(minibelady_env_t *env, ir_node *block)
{
block_info_t *block_info;
be_next_use_t next_use;
ir_loop *loop;
ir_node *best_starter, *first;
- ir_node *node;
int n_cfgpreds;
unsigned best_time;
int outer_loop_allowed;
- int i;
/* Create the block info for this block. */
block_info = new_block_info(&env->obst, block);
n_cfgpreds = get_Block_n_cfgpreds(block);
/* no cfgpred -> no value active */
- if(n_cfgpreds == 0) {
+ if (n_cfgpreds == 0) {
block_info->start_state = NULL;
return block_info;
}
/* for 1 pred only: simply take the the end-state of the pred */
- if(n_cfgpreds == 1) {
+ if (n_cfgpreds == 1) {
ir_node *pred_block = get_Block_cfgpred_block(block, 0);
block_info_t *pred_info;
sched_foreach(block, node) {
if (!is_Phi(node))
break;
- if (arch_get_irn_register(env->arch_env, node) != env->reg)
+ if (arch_get_irn_register(node) != env->reg)
continue;
DBG((dbg, LEVEL_2, "\t...checking %+F\n", node));
- next_use = be_get_next_use(env->uses, first, 0, node, 0);
+ next_use = be_get_next_use(env->uses, first, node, 0);
- if(USES_IS_INFINITE(next_use.time)) {
+ if (USES_IS_INFINITE(next_use.time)) {
DBG((dbg, LEVEL_2, "\tnot taken (dead)\n"));
continue;
}
- if(next_use.outermost_loop >= get_loop_depth(loop)) {
- if(outer_loop_allowed || next_use.time < best_time) {
+ if (next_use.outermost_loop >= get_loop_depth(loop)) {
+ if (outer_loop_allowed || next_use.time < best_time) {
DBG((dbg, LEVEL_2, "\ttaken (%u, loop %d)\n", next_use.time,
next_use.outermost_loop));
- if(best_starter != NULL) {
+ if (best_starter != NULL) {
/* spill the phi as it is not used */
spill_phi(env, best_starter);
}
outer_loop_allowed = 0;
}
} else {
- if(outer_loop_allowed && next_use.time < best_time) {
+ if (outer_loop_allowed && next_use.time < best_time) {
DBG((dbg, LEVEL_2, "\ttaken (%u, loop %d)\n", next_use.time,
next_use.outermost_loop));
- if(best_starter != NULL) {
+ if (best_starter != NULL) {
/* spill the phi as it is not used */
spill_phi(env, best_starter);
}
}
}
- if(best_starter != node) {
+ if (best_starter != node) {
/* spill the phi as it is not used */
spill_phi(env, best_starter);
}
}
/* check all Live-Ins */
- be_lv_foreach(env->lv, block, be_lv_state_in, i) {
- node = be_lv_get_irn(env->lv, block, i);
+ be_lv_foreach(env->lv, block, be_lv_state_in, node) {
+ if (!mode_is_data(get_irn_mode(node)))
+ continue;
- if (arch_get_irn_register(env->arch_env, node) != env->reg)
+ if (arch_get_irn_register(node) != env->reg)
continue;
DBG((dbg, LEVEL_2, "\t...checking %+F\n", node));
- next_use = be_get_next_use(env->uses, first, 0, node, 0);
+ next_use = be_get_next_use(env->uses, first, node, 0);
- if(USES_IS_INFINITE(next_use.time)) {
+ if (USES_IS_INFINITE(next_use.time)) {
DBG((dbg, LEVEL_2, "\tnot taken (dead)\n"));
continue;
}
- if(next_use.outermost_loop >= get_loop_depth(loop)) {
- if(outer_loop_allowed || next_use.time < best_time) {
+ if (next_use.outermost_loop >= get_loop_depth(loop)) {
+ if (outer_loop_allowed || next_use.time < best_time) {
DBG((dbg, LEVEL_2, "\ttaken (%u, loop %d)\n", next_use.time,
next_use.outermost_loop));
- if(best_starter != NULL && is_Phi(best_starter)) {
+ if (best_starter != NULL && is_Phi(best_starter)) {
/* spill the phi as it is not used */
spill_phi(env, best_starter);
}
outer_loop_allowed = 0;
}
} else {
- if(outer_loop_allowed && next_use.time < best_time) {
+ if (outer_loop_allowed && next_use.time < best_time) {
DBG((dbg, LEVEL_2, "\ttaken (%u, loop %d)\n", next_use.time,
next_use.outermost_loop));
- if(best_starter != NULL && is_Phi(best_starter)) {
+ if (best_starter != NULL && is_Phi(best_starter)) {
/* spill the phi as it is not used */
spill_phi(env, best_starter);
}
* whether it is used from a register or is reloaded
* before the use.
*/
-static
-void belady(minibelady_env_t *env, ir_node *block)
+static void belady(minibelady_env_t *env, ir_node *block)
{
ir_node *current_state;
- ir_node *node;
block_info_t *block_info;
/* Don't do a block twice */
- if(irn_visited(block))
+ if (irn_visited(block))
return;
/* compute value to start with */
/* check which state is desired for the node */
arity = get_irn_arity(node);
- for(i = 0; i < arity; ++i) {
+ for (i = 0; i < arity; ++i) {
+ const arch_register_t *reg;
ir_node *in = get_irn_n(node, i);
- const arch_register_t *reg =
- arch_get_irn_register(env->arch_env, in);
- if(reg == env->reg) {
+
+ if (!mode_is_data(get_irn_mode(in)))
+ continue;
+
+ reg = arch_get_irn_register(in);
+ if (reg == env->reg) {
assert(need_val == NULL);
need_val = in;
DBG((dbg, LEVEL_3, "\t... need state %+F\n", need_val));
}
}
/* create a reload to match state if necessary */
- if(need_val != NULL && need_val != current_state) {
+ if (need_val != NULL && need_val != current_state) {
+ ir_node *before = node;
DBG((dbg, LEVEL_3, "\t... reloading %+F\n", need_val));
- create_reload(env, need_val, node, current_state);
+ create_reload(env, need_val, before, current_state);
current_state = need_val;
}
/* record state changes by the node */
if (get_irn_mode(node) == mode_T) {
- ir_node *proj;
- for(proj = sched_next(node); is_Proj(proj);
- proj = sched_next(proj)) {
- const arch_register_t *reg =
- arch_get_irn_register(env->arch_env, proj);
- if(reg == env->reg) {
+ foreach_out_edge(node, edge) {
+ const arch_register_t *reg;
+ ir_node *proj = get_edge_src_irn(edge);
+
+ if (!mode_is_data(get_irn_mode(proj)))
+ continue;
+
+ reg = arch_get_irn_register(proj);
+ if (reg == env->reg) {
current_state = proj;
DBG((dbg, LEVEL_3, "\t... current_state <- %+F\n", current_state));
}
}
} else {
- const arch_register_t *reg =
- arch_get_irn_register(env->arch_env, node);
- if(reg == env->reg) {
- current_state = node;
- DBG((dbg, LEVEL_3, "\t... current_state <- %+F\n", current_state));
+ if (mode_is_data(get_irn_mode(node))) {
+ const arch_register_t *reg = arch_get_irn_register(node);
+ if (reg == env->reg) {
+ current_state = node;
+ DBG((dbg, LEVEL_3, "\t... current_state <- %+F\n", current_state));
+ }
}
}
}
DBG((dbg, LEVEL_3, "End value for %+F: %+F\n", block, current_state));
}
-static
-void belady_walker(ir_node *block, void *data)
+static void belady_walker(ir_node *block, void *data)
{
belady((minibelady_env_t*) data, block);
}
-static
-ir_node *get_end_of_block_insertion_point(ir_node *block)
+static ir_node *get_end_of_block_insertion_point(ir_node *block)
{
ir_node *last = sched_last(block);
- /* skip projs and keepanies behind the jump... */
- while(is_Proj(last) || be_is_Keep(last)) {
+ /* skip Projs and Keep-alikes behind the jump... */
+ while (is_Proj(last) || be_is_Keep(last)) {
last = sched_prev(last);
}
- if(!is_cfop(last)) {
+ if (!is_cfop(last)) {
last = sched_next(last);
- // last node must be a cfop, only exception is the start block
- assert(last == get_irg_start_block(get_irn_irg(block)));
+ /* last node must be a cfop, only exception is the start block */
+ assert(last == get_irg_start_block(get_irn_irg(block)));
}
return last;
/**
* We must adapt the live-outs to the live-ins at each block-border.
*/
-static
-void fix_block_borders(ir_node *block, void *data) {
- minibelady_env_t *env = data;
+static void fix_block_borders(ir_node *block, void *data)
+{
+ minibelady_env_t *env = (minibelady_env_t*)data;
ir_graph *irg = get_irn_irg(block);
ir_node *startblock = get_irg_start_block(irg);
int i;
int arity;
block_info_t *block_info;
- if(block == startblock)
+ if (block == startblock)
return;
DBG((dbg, LEVEL_3, "\n"));
- DBG((dbg, LEVEL_3, "Fixing %+F\n", block));
block_info = get_block_info(block);
+ DBG((dbg, LEVEL_3, "Fixing %+F (needs %+F)\n", block,
+ block_info->start_state));
+
/* process all pred blocks */
arity = get_irn_arity(block);
for (i = 0; i < arity; ++i) {
- ir_node *pred = get_Block_cfgpred_block(block, i);
- block_info_t *pred_info = get_block_info(pred);
+ ir_node *pred = get_Block_cfgpred_block(block, i);
+ block_info_t *pred_info = get_block_info(pred);
+ ir_node *need_state = block_info->start_state;
- DBG((dbg, LEVEL_3, " Pred %+F\n", pred));
+ if (need_state == NULL)
+ continue;
- if(pred_info->end_state != block_info->start_state &&
- block_info->start_state != NULL) {
- ir_node *need_state = block_info->start_state;
- ir_node *insert_point =
- get_end_of_block_insertion_point(pred);
+ if (is_Phi(need_state) && get_nodes_block(need_state) == block) {
+ need_state = get_irn_n(need_state, i);
+ }
+ DBG((dbg, LEVEL_3, " Pred %+F (ends in %+F, we need %+F)\n", pred,
+ pred_info->end_state, need_state));
+
+ if (pred_info->end_state != need_state) {
+ ir_node *insert_point = get_end_of_block_insertion_point(pred);
+
+
+ DBG((dbg, LEVEL_3, " Creating reload for %+F\n", need_state));
create_reload(env, need_state, insert_point, pred_info->end_state);
}
}
}
-void be_assure_state(be_irg_t *birg, const arch_register_t *reg, void *func_env,
+void be_assure_state(ir_graph *irg, const arch_register_t *reg, void *func_env,
create_spill_func create_spill,
- create_reload_func create_reload) {
+ create_reload_func create_reload)
+{
minibelady_env_t env;
- ir_graph *irg = be_get_birg_irg(birg);
spill_info_t *info;
- be_lv_t *lv = be_get_birg_liveness(birg);
+ be_lv_t *lv = be_get_irg_liveness(irg);
- be_assure_liveness(birg);
- be_assure_dom_front(birg);
- /* construct control flow loop tree */
- if(! (get_irg_loopinfo_state(irg) & loopinfo_cf_consistent)) {
- construct_cf_backedges(irg);
- }
+ be_assure_live_sets(irg);
+ assure_loopinfo(irg);
obstack_init(&env.obst);
- env.arch_env = be_get_birg_arch_env(birg);
env.reg = reg;
env.func_env = func_env;
env.create_spill = create_spill;
env.create_reload = create_reload;
- env.lv = be_get_birg_liveness(birg);
+ env.lv = be_get_irg_liveness(irg);
env.uses = be_begin_uses(irg, env.lv);
env.spills = NULL;
+ ir_nodehashmap_init(&env.spill_infos);
- set_using_visited(irg);
- set_using_irn_link(irg);
+ assure_doms(irg);
+ ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED | IR_RESOURCE_IRN_LINK);
inc_irg_visited(irg);
/* process blocks */
/* fix block end_states that don't match the next blocks start_state */
irg_block_walk_graph(irg, fix_block_borders, NULL, &env);
- clear_using_visited(irg);
- clear_using_irn_link(irg);
+ ir_free_resources(irg, IR_RESOURCE_IRN_VISITED | IR_RESOURCE_IRN_LINK);
/* reconstruct ssa-form */
info = env.spills;
- while(info != NULL) {
+ while (info != NULL) {
be_ssa_construction_env_t senv;
- int i, len;
+ size_t i, len;
ir_node **phis;
- be_ssa_construction_init(&senv, birg);
- if(sched_is_scheduled(info->value))
+ be_ssa_construction_init(&senv, irg);
+ if (sched_is_scheduled(info->value))
be_ssa_construction_add_copy(&senv, info->value);
be_ssa_construction_add_copies(&senv,
info->reloads, ARR_LEN(info->reloads));
be_ssa_construction_fix_users(&senv, info->value);
- if(lv != NULL) {
+ if (lv != NULL) {
be_ssa_construction_update_liveness_phis(&senv, lv);
be_liveness_update(lv, info->value);
len = ARR_LEN(info->reloads);
- for(i = 0; i < len; ++i) {
+ for (i = 0; i < len; ++i) {
ir_node *reload = info->reloads[i];
be_liveness_update(lv, reload);
}
/* set register requirements for phis */
len = ARR_LEN(phis);
- for(i = 0; i < len; ++i) {
+ for (i = 0; i < len; ++i) {
ir_node *phi = phis[i];
- be_set_phi_flags(env.arch_env, phi, arch_irn_flags_ignore);
- arch_set_irn_register(env.arch_env, phi, env.reg);
+ arch_set_irn_register(phi, env.reg);
}
be_ssa_construction_destroy(&senv);
/* some nodes might be dead now. */
be_remove_dead_nodes_from_schedule(irg);
+ ir_nodehashmap_destroy(&env.spill_infos);
be_end_uses(env.uses);
obstack_free(&env.obst, NULL);
}
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_state)
void be_init_state(void)
{
FIRM_DBG_REGISTER(dbg, "firm.be.state");
}
-
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_state);
projects / libfirm / blobdiff