-/**
- * Author: Daniel Grund
- * Date: 28.02.2006
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+/*
+ * Copyright (C) 1995-2007 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 ILP based copy minimization.
+ * @author Daniel Grund
+ * @date 28.02.2006
+ * @version $Id$
*
* ILP formalization using G=(V, E, Q):
* - 2 class of variables: coloring vars x_ic and equal color vars y_ij
*
* x_nc, y_ij \in N, w_ij \in R^+
*/
-
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#ifdef WITH_ILP
+#include "bitset.h"
+#include "raw_bitset.h"
+#include "pdeq.h"
+
#include "irtools.h"
#include "irgwalk.h"
#include "becopyilp_t.h"
#include "beifg_t.h"
#include "besched_t.h"
+#include "benodesets.h"
#define DEBUG_LVL 1
typedef struct _local_env_t {
- firm_dbg_module_t *dbg;
double time_limit;
int first_x_var, last_x_var;
pmap *nr_2_irn;
+ DEBUG_ONLY(firm_dbg_module_t *dbg;)
} local_env_t;
static void build_coloring_cstr(ilp_env_t *ienv) {
be_ifg_foreach_node(ifg, iter, irn)
if (!sr_is_removed(ienv->sr, irn)) {
int col, cst_idx;
- arch_register_req_t req;
+ const arch_register_req_t *req;
int curr_node_color = get_irn_col(ienv->co, irn);
int node_nr = (int)get_irn_node_nr(irn);
local_env_t *lenv = ienv->env;
pmap_insert(lenv->nr_2_irn, INT_TO_PTR(node_nr), irn);
- arch_get_register_req(ienv->co->aenv, &req, irn, -1);
+ req = arch_get_register_req(ienv->co->aenv, irn, -1);
/* get assignable colors */
- if (arch_register_req_is(&req, limited))
- req.limited(req.limited_env, colors);
- else
- arch_put_non_ignore_regs(ienv->co->aenv, req.cls, colors);
+ if (arch_register_req_is(req, limited)) {
+ rbitset_copy_to_bitset(req->limited, colors);
+ } else {
+ arch_register_class_put(req->cls, colors);
+ // bitset_andnot(colors, ienv->co->cenv->ignore_colors);
+ }
/* add the coloring constraint */
cst_idx = lpp_add_cst(ienv->lp, NULL, lpp_equal, 1.0);
/* for each maximal clique */
be_ifg_foreach_clique(ifg, iter, clique, &size) {
+ int realsize = 0;
- if (size < 2)
+ for (i=0; i<size; ++i)
+ if (!sr_is_removed(ienv->sr, clique[i]))
+ ++realsize;
+
+ if (realsize < 2)
continue;
/* for all colors */
}
}
+
+/**
+ * TODO: Remove the dependency of the opt-units data structure
+ * by walking over all affinity edges. Graph structure
+ * does not provide this walker, yet.
+ */
static void build_affinity_cstr(ilp_env_t *ienv) {
unit_t *curr;
int n_colors = arch_register_class_n_regs(ienv->co->cls);
lpp_set_factor_fast(ienv->lp, cst_idx, root_idx, 1.0);
lpp_set_factor_fast(ienv->lp, cst_idx, arg_idx, -1.0);
- lpp_set_factor_fast(ienv->lp, cst_idx, root_idx, -1.0);
+ lpp_set_factor_fast(ienv->lp, cst_idx, y_idx, -1.0);
}
}
}
return ! (e1->n1 == e2->n1 && e1->n2 == e2->n2);
}
-#define HASH_EDGE(e) (HASH_PTR((e)->n1) ^ HASH_PTR((e)->n2))
+#define HASH_EDGE(e) (nodeset_hash((e)->n1) ^ nodeset_hash((e)->n2))
static INLINE edge_t *add_edge(set *edges, ir_node *n1, ir_node *n2, int *counter) {
edge_t new_edge;
new_edge.n1 = n2;
new_edge.n2 = n1;
}
- *counter++;
+ (*counter)++;
return set_insert(edges, &new_edge, sizeof(new_edge), HASH_EDGE(&new_edge));
}
if (e) {
e->n1 = NULL;
e->n2 = NULL;
- *counter--;
+ (*counter)--;
}
}
* At most 1 node of the clique can be colored equally with the external node.
*/
static void build_clique_star_cstr(ilp_env_t *ienv) {
- node_t *node;
+ affinity_node_t *aff;
/* for each node with affinity edges */
- co_gs_foreach_node(ienv->co, node) {
+ co_gs_foreach_aff_node(ienv->co, aff) {
struct obstack ob;
neighb_t *nbr;
- ir_node *center = node->irn;
+ ir_node *center = aff->irn;
ir_node **nodes;
set *edges;
int i, o, n_nodes, n_edges;
/* get all affinity neighbours */
n_nodes = 0;
- co_gs_foreach_neighb(node, nbr) {
+ co_gs_foreach_neighb(aff, nbr) {
obstack_ptr_grow(&ob, nbr->irn);
++n_nodes;
}
for (e=set_first(edges); !e->n1; e=set_next(edges))
/*nothing*/ ;
- remove_edge(edges, e->n1, e->n2, &n_edges);
+ /* we could be stepped out of the loop before the set iterated to the end */
+ set_break(edges);
+
pset_insert_ptr(clique, e->n1);
pset_insert_ptr(clique, e->n2);
+ remove_edge(edges, e->n1, e->n2, &n_edges);
/* while the clique is growing */
do {
}
}
+
+static void extend_path(ilp_env_t *ienv, pdeq *path, ir_node *irn) {
+ be_ifg_t *ifg = ienv->co->cenv->ifg;
+ int i, len;
+ ir_node **curr_path;
+ affinity_node_t *aff;
+ neighb_t *nbr;
+
+ /* do not walk backwards or in circles */
+ if (pdeq_contains(path, irn))
+ return;
+
+ /* insert the new irn */
+ pdeq_putr(path, irn);
+
+
+
+ /* check for forbidden interferences */
+ len = pdeq_len(path);
+ curr_path = alloca(len * sizeof(*curr_path));
+ pdeq_copyl(path, (const void **)curr_path);
+
+ for (i=1; i<len; ++i)
+ if (be_ifg_connected(ifg, irn, curr_path[i]))
+ goto end;
+
+
+
+ /* check for terminating interference */
+ if (be_ifg_connected(ifg, irn, curr_path[0])) {
+
+ /* One node is not a path. */
+ /* And a path of length 2 is covered by a clique star constraint. */
+ if (len > 2) {
+ /* finally build the constraint */
+ int cst_idx = lpp_add_cst(ienv->lp, NULL, lpp_greater, 1.0);
+ for (i=1; i<len; ++i) {
+ char buf[16];
+ int nr_1 = get_irn_node_nr(curr_path[i-1]);
+ int nr_2 = get_irn_node_nr(curr_path[i]);
+ int var_idx = lpp_get_var_idx(ienv->lp, name_cdd_sorted(buf, 'y', nr_1, nr_2));
+ lpp_set_factor_fast(ienv->lp, cst_idx, var_idx, 1.0);
+ }
+ }
+
+ /* this path cannot be extended anymore */
+ goto end;
+ }
+
+
+
+ /* recursively extend the path */
+ aff = get_affinity_info(ienv->co, irn);
+ co_gs_foreach_neighb(aff, nbr)
+ extend_path(ienv, path, nbr->irn);
+
+
+end:
+ /* remove the irn */
+ pdeq_getr(path);
+
+}
+
/**
- *
+ * Search a path of affinity edges, whose ends are connected
+ * by an interference edge and there are no other interference
+ * edges in between.
+ * Then at least one of these affinity edges must break.
*/
static void build_path_cstr(ilp_env_t *ienv) {
+ affinity_node_t *aff_info;
+
+ /* for each node with affinity edges */
+ co_gs_foreach_aff_node(ienv->co, aff_info) {
+ pdeq *path = new_pdeq();
+
+ extend_path(ienv, path, aff_info->irn);
+ del_pdeq(path);
+ }
}
static void ilp2_build(ilp_env_t *ienv) {
lpp_sol_state_t state;
int i, count;
- count = lenv->last_x_var - lenv->first_x_var + 1;
- sol = xmalloc(count * sizeof(sol[0]));
- state = lpp_get_solution(ienv->lp, sol, lenv->first_x_var, lenv->last_x_var);
- if (state != lpp_optimal) {
- printf("WARNING %s: Solution state is not 'optimal': %d\n", ienv->co->name, state);
- assert(state >= lpp_feasible && "The solution should at least be feasible!");
- }
+ /* first check if there was sth. to optimize */
+ if (lenv->first_x_var >= 0) {
+
+ count = lenv->last_x_var - lenv->first_x_var + 1;
+ sol = xmalloc(count * sizeof(sol[0]));
+ state = lpp_get_solution(ienv->lp, sol, lenv->first_x_var, lenv->last_x_var);
+ if (state != lpp_optimal) {
+ printf("WARNING %s: Solution state is not 'optimal': %d\n", ienv->co->name, state);
+ assert(state >= lpp_feasible && "The solution should at least be feasible!");
+ }
- for (i=0; i<count; ++i) {
- int nodenr, color;
- char var_name[16];
+ for (i=0; i<count; ++i) {
+ int nodenr, color;
+ char var_name[16];
- if (sol[i] > 1-EPSILON) { /* split variable name into components */
- lpp_get_var_name(ienv->lp, lenv->first_x_var+i, var_name, sizeof(var_name));
+ if (sol[i] > 1-EPSILON) { /* split variable name into components */
+ lpp_get_var_name(ienv->lp, lenv->first_x_var+i, var_name, sizeof(var_name));
- if (sscanf(var_name, "x_%d_%d", &nodenr, &color) == 2) {
- ir_node *irn = pmap_get(lenv->nr_2_irn, INT_TO_PTR(nodenr));
- assert(irn && "This node number must be present in the map");
+ if (sscanf(var_name, "x_%d_%d", &nodenr, &color) == 2) {
+ ir_node *irn = pmap_get(lenv->nr_2_irn, INT_TO_PTR(nodenr));
+ assert(irn && "This node number must be present in the map");
- set_irn_col(ienv->co, irn, color);
- } else
- assert(0 && "This should be a x-var");
+ set_irn_col(ienv->co, irn, color);
+ } else
+ assert(0 && "This should be a x-var");
+ }
}
}
#endif
}
-int co_solve_ilp2(copy_opt_t *co, double time_limit) {
+int co_solve_ilp2(copy_opt_t *co) {
lpp_sol_state_t sol_state;
ilp_env_t *ienv;
local_env_t my;
- my.time_limit = time_limit;
+ ASSERT_OU_AVAIL(co); //See build_clique_st
+ ASSERT_GS_AVAIL(co);
+
+ my.time_limit = 0;
my.first_x_var = -1;
my.last_x_var = -1;
my.nr_2_irn = pmap_create();
- my.dbg = firm_dbg_register("ir.be.coilp2");
- firm_dbg_set_mask(my.dbg, DEBUG_LVL);
+ FIRM_DBG_REGISTER(my.dbg, "firm.be.coilp2");
ienv = new_ilp_env(co, ilp2_build, ilp2_apply, &my);
#else /* WITH_ILP */
-static void only_that_you_can_compile_without_WITH_ILP_defined(void) {
+static INLINE void only_that_you_can_compile_without_WITH_ILP_defined(void) {
}
#endif /* WITH_ILP */
projects / libfirm / blobdiff