/*
- * Author: Matthias Braun, Christoph Mallon
- * Date: 27.09.2006
- * Copyright: (c) Universitaet Karlsruhe
- * License: This file is protected by GPL - GNU GENERAL PUBLIC LICENSE.
- * CVS-Id: $Id$
+ * 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.
+ */
+
+/**
+ * @file
+ * @brief Block-scheduling strategies.
+ * @author Matthias Braun, Christoph Mallon
+ * @date 27.09.2006
+ *
+ * The goals of the greedy (and ILP) algorithm here works by assuming that
+ * we want to change as many jumps to fallthroughs as possible (executed jumps
+ * actually, we have to look at the execution frequencies). The algorithms
+ * do this by collecting execution frequencies of all branches (which is easily
+ * possible when all critical edges are split) then removes critical edges where
+ * possible as we don't need and want them anymore now. The algorithms then try
+ * to change as many edges to fallthroughs as possible, this is done by setting
+ * a next and prev pointers on blocks. The greedy algorithm sorts the edges by
+ * execution frequencies and tries to transform them to fallthroughs in this order
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif /* HAVE_CONFIG_H */
#include "beblocksched.h"
#include "array.h"
#include "pdeq.h"
-
+#include "beirg.h"
#include "iredges.h"
#include "irgwalk.h"
+#include "irnode_t.h"
#include "irgraph_t.h"
#include "irloop.h"
#include "irprintf.h"
+#include "execfreq.h"
#include "irdump_t.h"
+#include "irtools.h"
+#include "util.h"
+#include "debug.h"
#include "beirgmod.h"
+#include "bemodule.h"
+#include "be.h"
+#include "error.h"
-#ifdef WITH_LIBCORE
-#include <libcore/lc_opts.h>
-#include <libcore/lc_opts_enum.h>
-#include <libcore/lc_timing.h>
-#endif /* WITH_LIBCORE */
+#include "lc_opts.h"
+#include "lc_opts_enum.h"
-#ifdef WITH_ILP
-#include <lpp/lpp.h>
-#include <lpp/lpp_net.h>
-#endif /* WITH_ILP */
+#include "lpp.h"
+#include "lpp_net.h"
-typedef enum _blocksched_algos_t {
- BLOCKSCHED_NAIV, BLOCKSCHED_EXTBB, BLOCKSCHED_GREEDY, BLOCKSCHED_ILP
+DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
+
+typedef enum blocksched_algos_t {
+ BLOCKSCHED_NAIV, BLOCKSCHED_GREEDY, BLOCKSCHED_ILP
} blocksched_algos_t;
static int algo = BLOCKSCHED_GREEDY;
static const lc_opt_enum_int_items_t blockschedalgo_items[] = {
- { "naiv", BLOCKSCHED_NAIV },
- { "extbb", BLOCKSCHED_EXTBB },
+ { "naiv", BLOCKSCHED_NAIV },
{ "greedy", BLOCKSCHED_GREEDY },
-#ifdef WITH_ILP
{ "ilp", BLOCKSCHED_ILP },
-#endif /* WITH_ILP */
{ NULL, 0 }
};
};
static const lc_opt_table_entry_t be_blocksched_options[] = {
- LC_OPT_ENT_ENUM_INT ("algo", "the block scheduling algorithm (naiv, extbb, greedy, ilp)", &algo_var),
- { NULL }
+ LC_OPT_ENT_ENUM_INT ("blockscheduler", "the block scheduling algorithm", &algo_var),
+ LC_OPT_LAST
};
/*
* |___/
*/
-typedef struct _blocksched_entry_t {
- ir_node *block;
- struct _blocksched_entry_t *next;
- struct _blocksched_entry_t *prev;
-} blocksched_entry_t;
+typedef struct blocksched_entry_t blocksched_entry_t;
+struct blocksched_entry_t {
+ ir_node *block;
+ blocksched_entry_t *next;
+ blocksched_entry_t *prev;
+};
-typedef struct _edge_t {
- ir_node *block;
- int pos;
- double execfreq;
- int highest_execfreq; /**< flag that indicates wether this edge is the edge with the highest
- execfreq pointing away from this block */
-} edge_t;
-
-typedef struct _blocksched_env_t {
- ir_graph *irg;
+typedef struct edge_t edge_t;
+struct edge_t {
+ ir_node *block; /**< source block */
+ int pos; /**< number of cfg predecessor (target) */
+ double execfreq; /**< the frequency */
+ double outedge_penalty_freq; /**< for edges leaving the loop this is the
+ penality when we make them a
+ fallthrough. */
+ int highest_execfreq; /**< flag that indicates whether this edge is
+ the edge with the highest execfreq pointing
+ away from this block */
+};
+
+typedef struct blocksched_env_t blocksched_env_t;
+struct blocksched_env_t {
+ ir_graph *irg;
struct obstack *obst;
- ir_exec_freq *execfreqs;
- edge_t *edges;
- pdeq *worklist;
- int blockcount;
-} blocksched_env_t;
+ edge_t *edges;
+ pdeq *worklist;
+ int blockcount;
+};
+static blocksched_entry_t* get_blocksched_entry(const ir_node *block)
+{
+ return (blocksched_entry_t*)get_irn_link(block);
+}
+
+/**
+ * Collect cfg frequencies of all edges between blocks.
+ * Also determines edge with highest frequency.
+ */
static void collect_egde_frequency(ir_node *block, void *data)
{
- blocksched_env_t *env = data;
- ir_graph *irg = env->irg;
- ir_node *startblock = get_irg_start_block(irg);
- int arity;
- edge_t edge;
+ blocksched_env_t *env = (blocksched_env_t*)data;
+ int arity;
+ edge_t edge;
blocksched_entry_t *entry;
+ ir_loop *loop;
+
+ memset(&edge, 0, sizeof(edge));
- entry = obstack_alloc(env->obst, sizeof(entry[0]));
+ entry = OALLOCZ(env->obst, blocksched_entry_t);
entry->block = block;
- entry->next = NULL;
- entry->prev = NULL;
set_irn_link(block, entry);
- if(block == startblock)
+ loop = get_irn_loop(block);
+
+ arity = get_Block_n_cfgpreds(block);
+
+ if (arity == 0) {
+ /* must be the start block (or end-block for endless loops),
+ * everything else is dead code and should be removed by now */
+ assert(block == get_irg_start_block(env->irg)
+ || block == get_irg_end_block(env->irg));
+ /* nothing to do here */
return;
+ } else if (arity == 1) {
+ ir_node *pred_block = get_Block_cfgpred_block(block, 0);
+ ir_loop *pred_loop = get_irn_loop(pred_block);
+ float freq = (float)get_block_execfreq(block);
+
+ /* is it an edge leaving a loop */
+ if (get_loop_depth(pred_loop) > get_loop_depth(loop)) {
+ float pred_freq = (float)get_block_execfreq(pred_block);
+ edge.outedge_penalty_freq = -(pred_freq - freq);
+ }
- arity = get_irn_arity(block);
- if(arity == 1) {
- edge.block = block;
- edge.pos = 0;
- edge.execfreq = get_block_execfreq(env->execfreqs, block);
+ edge.block = block;
+ edge.pos = 0;
+ edge.execfreq = freq;
edge.highest_execfreq = 1;
ARR_APP1(edge_t, env->edges, edge);
} else {
- int i;
- double highest_execfreq = -1;
- int highest_edge_num;
+ int i;
+ double highest_execfreq = -1.0;
+ int highest_edge_num = -1;
edge.block = block;
- for(i = 0; i < arity; ++i) {
- double execfreq;
-
+ for (i = 0; i < arity; ++i) {
+ double execfreq;
ir_node *pred_block = get_Block_cfgpred_block(block, i);
- execfreq = get_block_execfreq(env->execfreqs, pred_block);
- edge.pos = i;
- edge.execfreq = execfreq;
+ execfreq = get_block_execfreq(pred_block);
+
+ edge.pos = i;
+ edge.execfreq = execfreq;
edge.highest_execfreq = 0;
ARR_APP1(edge_t, env->edges, edge);
- if(execfreq > highest_execfreq) {
+
+ if (execfreq > highest_execfreq) {
highest_execfreq = execfreq;
highest_edge_num = ARR_LEN(env->edges) - 1;
}
}
- env->edges[highest_edge_num].highest_execfreq = 1;
+ if (highest_edge_num >= 0)
+ env->edges[highest_edge_num].highest_execfreq = 1;
+ }
+}
+
+static int cmp_edges_base(const edge_t *e1, const edge_t *e2)
+{
+ long nr1 = get_irn_node_nr(e1->block);
+ long nr2 = get_irn_node_nr(e2->block);
+ if (nr1 < nr2) {
+ return 1;
+ } else if (nr1 > nr2) {
+ return -1;
+ } else {
+ if (e1->pos < e2->pos) {
+ return 1;
+ } else if (e1->pos > e2->pos) {
+ return -1;
+ } else {
+ return 0;
+ }
}
}
static int cmp_edges(const void *d1, const void *d2)
{
- const edge_t *e1 = d1;
- const edge_t *e2 = d2;
- if (e2->execfreq > e1->execfreq) return 1;
- if (e2->execfreq < e1->execfreq) return -1;
- return 0;
+ const edge_t *e1 = (const edge_t*)d1;
+ const edge_t *e2 = (const edge_t*)d2;
+ double freq1 = e1->execfreq;
+ double freq2 = e2->execfreq;
+ if (freq1 < freq2) {
+ return 1;
+ } else if (freq1 > freq2) {
+ return -1;
+ } else {
+ return cmp_edges_base(e1, e2);
+ }
+}
+
+static int cmp_edges_outedge_penalty(const void *d1, const void *d2)
+{
+ const edge_t *e1 = (const edge_t*)d1;
+ const edge_t *e2 = (const edge_t*)d2;
+ double pen1 = e1->outedge_penalty_freq;
+ double pen2 = e2->outedge_penalty_freq;
+ if (pen1 > pen2) {
+ return 1;
+ } else if (pen1 < pen2) {
+ return -1;
+ } else {
+ return cmp_edges_base(e1, e2);
+ }
+}
+
+static void clear_loop_links(ir_loop *loop)
+{
+ int i, n;
+
+ set_loop_link(loop, NULL);
+ n = get_loop_n_elements(loop);
+ for (i = 0; i < n; ++i) {
+ loop_element elem = get_loop_element(loop, i);
+ if (*elem.kind == k_ir_loop) {
+ clear_loop_links(elem.son);
+ }
+ }
}
static void coalesce_blocks(blocksched_env_t *env)
{
int i;
int edge_count = ARR_LEN(env->edges);
+ edge_t *edges = env->edges;
- // run1: only look at jumps
- for(i = 0; i < edge_count; ++i) {
- const edge_t *edge = & env->edges[i];
- ir_node *block = edge->block;
- ir_node *pred_block;
+ /* sort interblock edges by execution frequency */
+ qsort(edges, ARR_LEN(edges), sizeof(edges[0]), cmp_edges);
+
+ /* run1: only look at jumps */
+ for (i = 0; i < edge_count; ++i) {
+ const edge_t *edge = &edges[i];
+ ir_node *block = edge->block;
+ int pos = edge->pos;
+ ir_node *pred_block;
blocksched_entry_t *entry, *pred_entry;
- // the block might have been removed already...
- if(is_Bad(get_Block_cfgpred(block, 0)))
+ /* only check edge with highest frequency */
+ if (! edge->highest_execfreq)
+ continue;
+
+ /* the block might have been removed already... */
+ if (is_Bad(get_Block_cfgpred(block, 0)))
+ continue;
+
+ pred_block = get_Block_cfgpred_block(block, pos);
+ entry = get_blocksched_entry(block);
+ pred_entry = get_blocksched_entry(pred_block);
+
+ if (pred_entry->next != NULL || entry->prev != NULL)
+ continue;
+
+ /* only coalesce jumps */
+ if (get_block_succ_next(pred_block, get_block_succ_first(pred_block)) != NULL)
continue;
- if(!edge->highest_execfreq)
+ /* schedule the 2 blocks behind each other */
+ DB((dbg, LEVEL_1, "Coalesce (Jump) %+F -> %+F (%.3g)\n",
+ pred_entry->block, entry->block, edge->execfreq));
+ pred_entry->next = entry;
+ entry->prev = pred_entry;
+ }
+
+ /* run2: pick loop fallthroughs */
+ clear_loop_links(get_irg_loop(env->irg));
+
+ qsort(edges, ARR_LEN(edges), sizeof(edges[0]), cmp_edges_outedge_penalty);
+ for (i = 0; i < edge_count; ++i) {
+ const edge_t *edge = &edges[i];
+ ir_node *block = edge->block;
+ int pos = edge->pos;
+ ir_node *pred_block;
+ blocksched_entry_t *entry, *pred_entry;
+ ir_loop *loop;
+ ir_loop *outer_loop;
+
+ /* already seen all loop outedges? */
+ if (edge->outedge_penalty_freq == 0)
+ break;
+
+ /* the block might have been removed already... */
+ if (is_Bad(get_Block_cfgpred(block, pos)))
continue;
- pred_block = get_Block_cfgpred_block(block, edge->pos);
- entry = get_irn_link(block);
- pred_entry = get_irn_link(pred_block);
+ pred_block = get_Block_cfgpred_block(block, pos);
+ entry = get_blocksched_entry(block);
+ pred_entry = get_blocksched_entry(pred_block);
- if(pred_entry->next != NULL || entry->prev != NULL)
+ if (pred_entry->next != NULL || entry->prev != NULL)
continue;
- // only coalesce jumps
- if(get_block_succ_next(pred_block, get_block_succ_first(pred_block)) != NULL)
+
+ /* we want at most 1 outedge fallthrough per loop */
+ loop = get_irn_loop(pred_block);
+ if (get_loop_link(loop) != NULL)
continue;
- // schedule the 2 blocks behind each other
- ir_fprintf(stderr, "Coalesce (Jump) %+F -> %+F (%.3g)\n",
- pred_entry->block, entry->block, edge->execfreq);
+ /* schedule the 2 blocks behind each other */
+ DB((dbg, LEVEL_1, "Coalesce (Loop Outedge) %+F -> %+F (%.3g)\n",
+ pred_entry->block, entry->block, edge->execfreq));
pred_entry->next = entry;
- entry->prev = pred_entry;
+ entry->prev = pred_entry;
+
+ /* all loops left have an outedge now */
+ outer_loop = get_irn_loop(block);
+ do {
+ /* we set loop link to loop to mark it */
+ set_loop_link(loop, loop);
+ loop = get_loop_outer_loop(loop);
+ } while (loop != outer_loop);
}
- // run2: remaining edges
- for(i = 0; i < edge_count; ++i) {
- const edge_t *edge = & env->edges[i];
- ir_node *block = edge->block;
- ir_node *pred_block;
+ /* sort interblock edges by execution frequency */
+ qsort(edges, ARR_LEN(edges), sizeof(edges[0]), cmp_edges);
+
+ /* run3: remaining edges */
+ for (i = 0; i < edge_count; ++i) {
+ const edge_t *edge = &edges[i];
+ ir_node *block = edge->block;
+ int pos = edge->pos;
+ ir_node *pred_block;
blocksched_entry_t *entry, *pred_entry;
- // the block might have been removed already...
- if(is_Bad(get_Block_cfgpred(block, 0)))
+ /* the block might have been removed already... */
+ if (is_Bad(get_Block_cfgpred(block, pos)))
continue;
- pred_block = get_Block_cfgpred_block(block, edge->pos);
- entry = get_irn_link(block);
- pred_entry = get_irn_link(pred_block);
+ pred_block = get_Block_cfgpred_block(block, pos);
+ entry = get_blocksched_entry(block);
+ pred_entry = get_blocksched_entry(pred_block);
- if(pred_entry->next != NULL || entry->prev != NULL)
+ /* is 1 of the blocks already attached to another block? */
+ if (pred_entry->next != NULL || entry->prev != NULL)
continue;
- // schedule the 2 blocks behind each other
- ir_fprintf(stderr, "Coalesce (CondJump) %+F -> %+F (%.3g)\n",
- pred_entry->block, entry->block, edge->execfreq);
+ /* schedule the 2 blocks behind each other */
+ DB((dbg, LEVEL_1, "Coalesce (CondJump) %+F -> %+F (%.3g)\n",
+ pred_entry->block, entry->block, edge->execfreq));
pred_entry->next = entry;
- entry->prev = pred_entry;
+ entry->prev = pred_entry;
}
}
static void pick_block_successor(blocksched_entry_t *entry, blocksched_env_t *env)
{
- ir_node *block = entry->block;
+ ir_node *block = entry->block;
+ ir_node *succ = NULL;
blocksched_entry_t *succ_entry;
- const ir_edge_t *edge;
- double best_succ_execfreq;
- ir_node *succ = NULL;
+ double best_succ_execfreq;
- if(irn_visited(block))
+ if (irn_visited_else_mark(block))
return;
+
env->blockcount++;
- mark_irn_visited(block);
- ir_fprintf(stderr, "Pick succ of %+F\n", block);
+ DB((dbg, LEVEL_1, "Pick succ of %+F\n", block));
- // put all successors into the worklist
+ /* put all successors into the worklist */
foreach_block_succ(block, edge) {
ir_node *succ_block = get_edge_src_irn(edge);
- if(irn_visited(succ_block))
+ if (irn_visited(succ_block))
continue;
- // we only need to put the first of a series of already connected
- // blocks into the worklist
- succ_entry = get_irn_link(succ_block);
- while(succ_entry->prev != NULL) {
- // break cycles...
- if(succ_entry->prev->block == succ_block) {
+ /* we only need to put the first of a series of already connected
+ * blocks into the worklist */
+ succ_entry = get_blocksched_entry(succ_block);
+ while (succ_entry->prev != NULL) {
+ /* break cycles... */
+ if (succ_entry->prev->block == succ_block) {
succ_entry->prev->next = NULL;
- succ_entry->prev = NULL;
+ succ_entry->prev = NULL;
break;
}
succ_entry = succ_entry->prev;
- };
+ }
- if(irn_visited(succ_entry->block))
+ if (irn_visited(succ_entry->block))
continue;
- ir_fprintf(stderr, "Put %+F into worklist\n", succ_entry->block);
+ DB((dbg, LEVEL_1, "Put %+F into worklist\n", succ_entry->block));
pdeq_putr(env->worklist, succ_entry->block);
}
- if(entry->next != NULL) {
+ if (entry->next != NULL) {
pick_block_successor(entry->next, env);
return;
}
- fprintf(stderr, "deciding...\n");
+ DB((dbg, LEVEL_1, "deciding...\n"));
best_succ_execfreq = -1;
+
/* no successor yet: pick the successor block with the highest execution
- * frequency which has no predecessor yet
- */
+ * frequency which has no predecessor yet */
+
foreach_block_succ(block, edge) {
ir_node *succ_block = get_edge_src_irn(edge);
- double execfreq;
- if(irn_visited(succ_block))
+ if (irn_visited(succ_block))
continue;
- succ_entry = get_irn_link(succ_block);
- if(succ_entry->prev != NULL)
+ succ_entry = get_blocksched_entry(succ_block);
+ if (succ_entry->prev != NULL)
continue;
- execfreq = get_block_execfreq(env->execfreqs, succ_block);
- if(execfreq > best_succ_execfreq) {
+ double execfreq = get_block_execfreq(succ_block);
+ if (execfreq > best_succ_execfreq) {
best_succ_execfreq = execfreq;
succ = succ_block;
}
}
- if(succ == NULL) {
- fprintf(stderr, "pick from worklist\n");
+ if (succ == NULL) {
+ DB((dbg, LEVEL_1, "pick from worklist\n"));
do {
- if(pdeq_empty(env->worklist)) {
- fprintf(stderr, "worklist empty\n");
+ if (pdeq_empty(env->worklist)) {
+ DB((dbg, LEVEL_1, "worklist empty\n"));
return;
}
- succ = pdeq_getl(env->worklist);
- } while(irn_visited(succ));
+ succ = (ir_node*)pdeq_getl(env->worklist);
+ } while (irn_visited(succ));
}
- succ_entry = get_irn_link(succ);
- entry->next = succ_entry;
+ succ_entry = get_blocksched_entry(succ);
+ entry->next = succ_entry;
succ_entry->prev = entry;
pick_block_successor(succ_entry, env);
static blocksched_entry_t *finish_block_schedule(blocksched_env_t *env)
{
- ir_graph *irg = env->irg;
- ir_node *startblock = get_irg_start_block(irg);
- blocksched_entry_t *entry = get_irn_link(startblock);
+ ir_graph *irg = env->irg;
+ ir_node *startblock = get_irg_start_block(irg);
+ blocksched_entry_t *entry = get_blocksched_entry(startblock);
+ ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
inc_irg_visited(irg);
env->worklist = new_pdeq();
assert(pdeq_empty(env->worklist));
del_pdeq(env->worklist);
+ ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
+
return entry;
}
-static ir_node **create_blocksched_array(blocksched_entry_t *first, int count,
- struct obstack* obst) {
- int i = 0;
- ir_node **block_list;
+static ir_node **create_blocksched_array(blocksched_env_t *env, blocksched_entry_t *first,
+ int count, struct obstack* obst)
+{
+ int i = 0;
+ ir_node **block_list;
blocksched_entry_t *entry;
+ (void) env;
block_list = NEW_ARR_D(ir_node *, obst, count);
- fprintf(stderr, "Blockschedule:\n");
- for(entry = first; entry != NULL; entry = entry->next) {
+ DB((dbg, LEVEL_1, "Blockschedule:\n"));
+
+ for (entry = first; entry != NULL; entry = entry->next) {
assert(i < count);
block_list[i++] = entry->block;
- ir_fprintf(stderr, "\t%+F\n", entry->block);
+ DB((dbg, LEVEL_1, "\t%+F\n", entry->block));
}
assert(i == count);
return block_list;
}
-static ir_node **create_block_schedule_greedy(ir_graph *irg, ir_exec_freq *execfreqs)
+static ir_node **create_block_schedule_greedy(ir_graph *irg)
{
- blocksched_env_t env;
- struct obstack obst;
+ blocksched_env_t env;
+ struct obstack obst;
blocksched_entry_t *start_entry;
- ir_node **block_list;
+ ir_node **block_list;
obstack_init(&obst);
- env.irg = irg;
- env.obst = &obst;
- env.execfreqs = execfreqs;
- env.edges = NEW_ARR_F(edge_t, 0);
- env.worklist = NULL;
+ env.irg = irg;
+ env.obst = &obst;
+ env.edges = NEW_ARR_F(edge_t, 0);
+ env.worklist = NULL;
env.blockcount = 0;
+ assure_loopinfo(irg);
+
// collect edge execution frequencies
irg_block_walk_graph(irg, collect_egde_frequency, NULL, &env);
- // sort interblock edges by execution frequency
- qsort(env.edges, ARR_LEN(env.edges), sizeof(env.edges[0]), cmp_edges);
-
- be_remove_empty_blocks(irg);
+ (void)be_remove_empty_blocks(irg);
- if(algo != BLOCKSCHED_NAIV)
+ if (algo != BLOCKSCHED_NAIV)
coalesce_blocks(&env);
start_entry = finish_block_schedule(&env);
-
- block_list = create_blocksched_array(start_entry, env.blockcount, get_irg_obstack(irg));
+ block_list = create_blocksched_array(&env, start_entry, env.blockcount,
+ be_get_be_obst(irg));
DEL_ARR_F(env.edges);
obstack_free(&obst, NULL);
*
*/
-#ifdef WITH_ILP
-typedef struct _ilp_edge_t {
- ir_node *block;
- int pos;
- int ilpvar;
+typedef struct ilp_edge_t {
+ ir_node *block; /**< source block */
+ int pos; /**< number of cfg predecessor (target) */
+ int ilpvar;
} ilp_edge_t;
-typedef struct _blocksched_ilp_env_t {
+typedef struct blocksched_ilp_env_t {
blocksched_env_t env;
- ilp_edge_t *ilpedges;
- lpp_t *lpp;
+ ilp_edge_t *ilpedges;
+ lpp_t *lpp;
} blocksched_ilp_env_t;
-typedef struct _blocksched_ilp_entry_t {
+typedef struct blocksched_ilp_entry_t {
ir_node *block;
- struct _blocksched_entry_t *next;
- struct _blocksched_entry_t *prev;
+ struct blocksched_entry_t *next;
+ struct blocksched_entry_t *prev;
int out_cst;
} blocksched_ilp_entry_t;
static int add_ilp_edge(ir_node *block, int pos, double execfreq, blocksched_ilp_env_t *env)
{
- char name[64];
+ char name[64];
ilp_edge_t edge;
- int edgeidx = ARR_LEN(env->ilpedges);
+ int edgeidx = ARR_LEN(env->ilpedges);
snprintf(name, sizeof(name), "edge%d", edgeidx);
- edge.block = block;
- edge.pos = pos;
+ edge.block = block;
+ edge.pos = pos;
edge.ilpvar = lpp_add_var_default(env->lpp, name, lpp_binary, execfreq, 1.0);
ARR_APP1(ilp_edge_t, env->ilpedges, edge);
static void collect_egde_frequency_ilp(ir_node *block, void *data)
{
- blocksched_ilp_env_t *env = data;
- ir_graph *irg = env->env.irg;
- ir_node *startblock = get_irg_start_block(irg);
- int arity;
+ blocksched_ilp_env_t *env = (blocksched_ilp_env_t*)data;
+ ir_graph *irg = env->env.irg;
+ ir_node *startblock = get_irg_start_block(irg);
+ int arity;
+ char name[64];
+ int out_count;
blocksched_ilp_entry_t *entry;
- lpp_cst_t cst;
- char name[64];
- int out_count;
snprintf(name, sizeof(name), "block_out_constr_%ld", get_irn_node_nr(block));
out_count = get_irn_n_edges_kind(block, EDGE_KIND_BLOCK);
- entry = obstack_alloc(env->env.obst, sizeof(entry[0]));
- entry->block = block;
- entry->next = NULL;
- entry->prev = NULL;
- entry->out_cst = lpp_add_cst_uniq(env->lpp, name, lpp_greater, out_count - 1);
+ entry = OALLOC(env->env.obst, blocksched_ilp_entry_t);
+ entry->block = block;
+ entry->next = NULL;
+ entry->prev = NULL;
+ entry->out_cst = lpp_add_cst_uniq(env->lpp, name, lpp_greater_equal, out_count - 1);
set_irn_link(block, entry);
- if(block == startblock)
+ if (block == startblock)
return;
arity = get_irn_arity(block);
- if(arity == 1) {
- double execfreq = get_block_execfreq(env->env.execfreqs, block);
+ if (arity == 1) {
+ double execfreq = get_block_execfreq(block);
add_ilp_edge(block, 0, execfreq, env);
- } else {
+ }
+ else {
int i;
- int *edgenums = alloca(sizeof(edgenums[0]) * arity);
+ int cst_idx;
snprintf(name, sizeof(name), "block_in_constr_%ld", get_irn_node_nr(block));
- cst = lpp_add_cst_uniq(env->lpp, name, lpp_greater, arity - 1);
+ cst_idx = lpp_add_cst_uniq(env->lpp, name, lpp_greater_equal, arity - 1);
- for(i = 0; i < arity; ++i) {
- double execfreq;
- int edgenum;
+ for (i = 0; i < arity; ++i) {
+ double execfreq;
+ int edgenum;
ilp_edge_t *edge;
+ ir_node *pred_block = get_Block_cfgpred_block(block, i);
- ir_node *pred_block = get_Block_cfgpred_block(block, i);
- execfreq = get_block_execfreq(env->env.execfreqs, pred_block);
-
- edgenum = add_ilp_edge(block, i, execfreq, env);
- edge = & env->ilpedges[edgenum];
- lpp_set_factor_fast(env->lpp, cst, edge->ilpvar, 1.0);
+ execfreq = get_block_execfreq(pred_block);
+ edgenum = add_ilp_edge(block, i, execfreq, env);
+ edge = &env->ilpedges[edgenum];
+ lpp_set_factor_fast(env->lpp, cst_idx, edge->ilpvar, 1.0);
}
}
}
+static blocksched_ilp_entry_t *get_blocksched_ilp_entry(const ir_node *block)
+{
+ return (blocksched_ilp_entry_t*)get_irn_link(block);
+}
static void coalesce_blocks_ilp(blocksched_ilp_env_t *env)
{
- int i;
- int edge_count = ARR_LEN(env->ilpedges);
- FILE *f;
- char fname[256];
+ int edge_count = ARR_LEN(env->ilpedges);
+ int i;
/* complete out constraints */
- for(i = 0; i < edge_count; ++i) {
- const ilp_edge_t *edge = & env->ilpedges[i];
- ir_node *block = edge->block;
- ir_node *pred;
+ for (i = 0; i < edge_count; ++i) {
+ const ilp_edge_t *edge = &env->ilpedges[i];
+ ir_node *block = edge->block;
+ ir_node *pred;
blocksched_ilp_entry_t *entry;
- // the block might have been removed already...
- if(is_Bad(get_Block_cfgpred(block, 0)))
+ /* the block might have been removed already... */
+ if (is_Bad(get_Block_cfgpred(block, 0)))
continue;
- pred = get_Block_cfgpred_block(block, edge->pos);
- entry = get_irn_link(pred);
+ pred = get_Block_cfgpred_block(block, edge->pos);
+ entry = get_blocksched_ilp_entry(pred);
- ir_printf("Adding out cst to %+F from %+F,%d\n",
- pred, block, edge->pos);
+ DB((dbg, LEVEL_1, "Adding out cst to %+F from %+F,%d\n",
+ pred, block, edge->pos));
lpp_set_factor_fast(env->lpp, entry->out_cst, edge->ilpvar, 1.0);
}
- lpp_dump(env->lpp, "lpp.out");
- snprintf(fname, sizeof(fname), "lpp_%s.plain", get_irg_dump_name(env->env.irg));
- f = fopen(fname, "w");
- lpp_dump_plain(env->lpp, f);
- fclose(f);
- //lpp_solve_net(env->lpp, main_env->options->ilp_server, main_env->options->ilp_solver);
- lpp_solve_net(env->lpp, "i44pc52", "cplex");
+ lpp_solve_net(env->lpp, be_options.ilp_server, be_options.ilp_solver);
assert(lpp_is_sol_valid(env->lpp));
/* Apply results to edges */
- for(i = 0; i < edge_count; ++i) {
- const ilp_edge_t *edge = & env->ilpedges[i];
- ir_node *block = edge->block;
- ir_node *pred;
- int is_jump;
+ for (i = 0; i < edge_count; ++i) {
+ const ilp_edge_t *edge = &env->ilpedges[i];
+ ir_node *block = edge->block;
+ ir_node *pred;
+ int is_jump;
blocksched_entry_t *entry;
blocksched_entry_t *pred_entry;
- // the block might have been removed already...
- if(is_Bad(get_Block_cfgpred(block, 0)))
+ /* the block might have been removed already... */
+ if (is_Bad(get_Block_cfgpred(block, 0)))
continue;
- is_jump = lpp_get_var_sol(env->lpp, edge->ilpvar);
- if(is_jump)
+ is_jump = (int)lpp_get_var_sol(env->lpp, edge->ilpvar);
+ if (is_jump)
continue;
- pred = get_Block_cfgpred_block(block, edge->pos);
- entry = get_irn_link(block);
- pred_entry = get_irn_link(pred);
+ pred = get_Block_cfgpred_block(block, edge->pos);
+ entry = get_blocksched_entry(block);
+ pred_entry = get_blocksched_entry(pred);
assert(entry->prev == NULL && pred_entry->next == NULL);
- entry->prev = pred_entry;
+ entry->prev = pred_entry;
pred_entry->next = entry;
}
}
-static ir_node **create_block_schedule_ilp(ir_graph *irg, ir_exec_freq *execfreqs)
+static ir_node **create_block_schedule_ilp(ir_graph *irg)
{
blocksched_ilp_env_t env;
- struct obstack obst;
- blocksched_entry_t *start_entry;
- ir_node **block_list;
+ struct obstack obst;
+ blocksched_entry_t *start_entry;
+ ir_node **block_list;
obstack_init(&obst);
- env.env.irg = irg;
- env.env.obst = &obst;
- env.env.execfreqs = execfreqs;
- env.env.worklist = NULL;
+ env.env.irg = irg;
+ env.env.obst = &obst;
+ env.env.worklist = NULL;
env.env.blockcount = 0;
- env.ilpedges = NEW_ARR_F(ilp_edge_t, 0);
+ env.ilpedges = NEW_ARR_F(ilp_edge_t, 0);
- env.lpp = new_lpp("blockschedule", lpp_minimize);
+ env.lpp = lpp_new("blockschedule", lpp_minimize);
lpp_set_time_limit(env.lpp, 20);
lpp_set_log(env.lpp, stdout);
irg_block_walk_graph(irg, collect_egde_frequency_ilp, NULL, &env);
- be_remove_empty_blocks(irg);
-
+ (void)be_remove_empty_blocks(irg);
coalesce_blocks_ilp(&env);
start_entry = finish_block_schedule(&env.env);
-
- block_list = create_blocksched_array(start_entry, env.env.blockcount, get_irg_obstack(irg));
+ block_list = create_blocksched_array(&env.env, start_entry,
+ env.env.blockcount,
+ be_get_be_obst(irg));
DEL_ARR_F(env.ilpedges);
- free_lpp(env.lpp);
+ lpp_free(env.lpp);
obstack_free(&obst, NULL);
return block_list;
}
-#endif /* WITH_ILP */
-
-/*
- * _____ _ ____ ____
- * | ____|_ _| |_| __ )| __ )
- * | _| \ \/ / __| _ \| _ \
- * | |___ > <| |_| |_) | |_) |
- * |_____/_/\_\\__|____/|____/
- *
- */
-
-/** A simple forward single linked list. */
-typedef struct {
- ir_node *start; /**< start of the list */
- ir_node *end; /**< last block in the list */
- unsigned n_blks; /**< number of blocks in the list */
-} anchor;
-
-static void add_block(anchor *list, ir_node *block) {
- if(list->start == NULL) {
- list->start = block;
- list->end = block;
- } else {
- set_irn_link(list->end, block);
- list->end = block;
- }
-
- list->n_blks++;
-}
-
-static void create_block_list(ir_node *leader_block, anchor *list) {
- int i;
- ir_node *block = NULL;
- const ir_edge_t *edge;
-
- ir_extblk *extbb = get_Block_extbb(leader_block);
- if(extbb_visited(extbb))
- return;
- mark_extbb_visited(extbb);
-
- for(i = 0; i < get_extbb_n_blocks(extbb); ++i) {
- block = get_extbb_block(extbb, i);
- add_block(list, block);
- }
-
- assert(block != NULL);
-
- // pick successor extbbs
- foreach_block_succ(block, edge) {
- ir_node *succ = get_edge_src_irn(edge);
-
- create_block_list(succ, list);
- }
-
- for(i = 0; i < get_extbb_n_blocks(extbb) - 1; ++i) {
- block = get_extbb_block(extbb, i);
- foreach_block_succ(block, edge) {
- ir_node *succ = get_edge_src_irn(edge);
-
- create_block_list(succ, list);
- }
- }
-}
-
-void compute_extbb_execfreqs(ir_graph *irg, ir_exec_freq *execfreqs);
-
-/*
- * Calculates a block schedule. The schedule is stored as a linked
- * list starting at the start_block of the irg.
- */
-static ir_node **create_extbb_block_schedule(ir_graph *irg, ir_exec_freq *execfreqs)
-{
- anchor list;
- ir_node **blk_list, *b, *n;
- unsigned i;
-
- /* schedule extended basic blocks */
- compute_extbb_execfreqs(irg, execfreqs);
- //compute_extbb(irg);
-
- list.start = NULL;
- list.end = NULL;
- list.n_blks = 0;
- inc_irg_block_visited(irg);
- create_block_list(get_irg_start_block(irg), &list);
-
- /** create an array, so we can go forward and backward */
- blk_list = NEW_ARR_D(ir_node *, irg->obst,list.n_blks);
-
- for (i = 0, b = list.start; b; b = n, ++i) {
- n = get_irn_link(b);
- blk_list[i] = b;
- }
-
- return blk_list;
-}
/*
* __ __ _
* |_| |_|\__,_|_|_| |_|
*
*/
-
-#ifdef WITH_LIBCORE
-void be_block_schedule_register_options(lc_opt_entry_t *grp)
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_blocksched)
+void be_init_blocksched(void)
{
- static int run_once = 0;
- lc_opt_entry_t *blocksched_grp;
+ lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
- if(run_once)
- return;
- run_once = 1;
- blocksched_grp = lc_opt_get_grp(grp, "blocksched");
+ lc_opt_add_table(be_grp, be_blocksched_options);
- lc_opt_add_table(blocksched_grp, be_blocksched_options);
+ FIRM_DBG_REGISTER(dbg, "firm.be.blocksched");
}
-#endif /* WITH_LIBCORE */
-ir_node **be_create_block_schedule(ir_graph *irg, ir_exec_freq *execfreqs)
+ir_node **be_create_block_schedule(ir_graph *irg)
{
- switch(algo) {
+ switch (algo) {
case BLOCKSCHED_GREEDY:
case BLOCKSCHED_NAIV:
- return create_block_schedule_greedy(irg, execfreqs);
- case BLOCKSCHED_EXTBB:
- return create_extbb_block_schedule(irg, execfreqs);
-#ifdef WITH_ILP
+ return create_block_schedule_greedy(irg);
case BLOCKSCHED_ILP:
- return create_block_schedule_ilp(irg, execfreqs);
-#endif /* WITH_ILP */
+ return create_block_schedule_ilp(irg);
}
- assert(0 && "unknown blocksched algo");
- return NULL;
+ panic("unknown blocksched algo");
}
projects / libfirm / blobdiff