+/*
+ * 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.
+ */
+
/**
- * Author: Daniel Grund
- * Date: 17.05.2005
- * Copyright: (c) Universitaet Karlsruhe
- * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * @file
+ * @brief Common stuff used by all ILP formulations.
+ * @author Daniel Grund
+ * @date 28.02.2006
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#endif
-
-#define PATH_CONSTRAINTS_FOR_CLASSES
-#undef PRECOLOR_MAX_CLIQUE
-#undef NO_NULL_COLORS
-#undef NO_NULL_COLORS_EXTRA_CSTS
-#undef NO_NULL_COLORS_WITH_COSTS
-#if (defined(NO_NULL_COLORS_EXTRA_CSTS) || defined(NO_NULL_COLORS_WITH_COSTS)) && !defined(NO_NULL_COLORS)
-#error Chose your weapon!
-#endif
-
-#include "irprog.h"
-
-#include <lpp/lpp.h>
-#include <lpp/lpp_net.h>
-#include <lpp/lpp_cplex.h>
-#include <lpp/lpp_remote.h>
-#include "xmalloc.h"
-#include "pset.h"
-#include "irdom_t.h"
-#include "iredges_t.h"
-#include "bechordal_t.h"
-#include "becopyopt.h"
-#include "becopystat.h"
-#include "besched_t.h"
-#include "phiclass.h"
-
-#define LPP_HOST "i44pc52"
-#define LPP_SOLVER "cplex"
-
-#undef DUMP_MPS
-static firm_dbg_module_t *dbg = NULL;
-
-#define MAX(a,b) ((a<b)?(b):(a))
-#define MIN(a,b) ((a<b)?(a):(b))
-#define EPSILON 0.00001
-#define SLOTS_LIVING 32
-
-typedef struct _simpl_t {
- struct list_head chain;
- if_node_t *ifn;
-} simpl_t;
-
-typedef struct _problem_instance_t {
- const copy_opt_t *co; /** the copy_opt problem */
- /* problem size reduction removing simple nodes */
- struct list_head simplicials; /**< holds all simpl_t's in right order to color*/
- pset *removed; /**< holds all removed simplicial irns */
- /* lp problem */
- lpp_t *curr_lp; /**< points to the problem currently used */
- lpp_t *dilp; /**< problem formulation directly as milp */
-#ifdef NO_NULL_COLORS_EXTRA_CSTS
- int first_nnc_cst_idx; /**< the first index of a constraint belonging to no-null-colors stuff*/
-#endif
- int first_nnc_var_idx; /**< the first index of a constraint belonging to no-null-colors stuff*/
-
- int cst_counter, first_x_var, last_x_var;
- char buf[32];
- int all_simplicial;
- pset *done;
-} problem_instance_t;
-
-#define is_removed(irn) pset_find_ptr(pi->removed, irn)
-
-#define is_color_possible(irn,color) arch_reg_is_allocatable(get_arch_env(pi->co), irn, arch_pos_make_out(0), arch_register_for_index(pi->co->chordal_env->cls, color))
-/*
- * Some stuff for variable name handling.
- */
-#define mangle_cst(buf, prefix, nr) \
- snprintf((buf), sizeof(buf), "%c%d", (prefix), (nr))
+#include <stdbool.h>
-#define mangle_var1(buf, prefix, color) \
- snprintf((buf), sizeof(buf), "%c%d", (prefix), (color))
+#include "be_t.h"
+#include "irtools.h"
+#include "irprintf.h"
-#define mangle_var2(buf, prefix, node_nr, color) \
- snprintf((buf), sizeof(buf), "%c%d_%d", (prefix), (node_nr), (color))
+#include "statev_t.h"
+#include "bemodule.h"
+#include "error.h"
-#define mangle_var3(buf, prefix, n1, n2, col) \
- snprintf((buf), sizeof(buf), "%c%d_%d_%d", (prefix), (n1), (n2), (col))
+#include "lpp.h"
-#define mangle_var_irn(buf, prefix, irn, color) \
- mangle_var2((buf), (prefix), get_irn_graph_nr(irn), (color))
+#include "lc_opts.h"
+#include "lc_opts_enum.h"
-#define split_var(var, nnr, col) \
- sscanf(var, "x%d_%d", (nnr), (col))
+#define DUMP_ILP 1
+#define DUMP_SOL 2
+static int time_limit = 60;
+static int solve_log = 0;
+static unsigned dump_flags = 0;
-/**
- * Checks if a node is simplicial in the graph
- * heeding the already removed nodes.
- */
-static INLINE int pi_is_simplicial(problem_instance_t *pi, const if_node_t *ifn) {
- int i, o, size = 0;
- if_node_t **all, *curr;
- all = alloca(ifn_get_degree(ifn) * sizeof(*all));
+static const lc_opt_enum_mask_items_t dump_items[] = {
+ { "ilp", DUMP_ILP },
+ { "sol", DUMP_SOL },
+ { NULL, 0 }
+};
- /* get all non-removed neighbors */
- foreach_neighb(ifn, curr)
- if (!is_removed(curr))
- all[size++] = curr;
+static lc_opt_enum_mask_var_t dump_var = {
+ &dump_flags, dump_items
+};
- /* check if these form a clique */
- for (i=0; i<size; ++i)
- for (o=i+1; o<size; ++o)
- if (!ifg_has_edge(pi->co->chordal_env, all[i], all[o]))
- return 0;
+static const lc_opt_table_entry_t options[] = {
+ LC_OPT_ENT_INT ("limit", "time limit for solving in seconds (0 for unlimited)", &time_limit),
+ LC_OPT_ENT_BOOL ("log", "show ilp solving log", &solve_log),
+ LC_OPT_ENT_ENUM_MASK("dump", "dump flags", &dump_var),
+ LC_OPT_LAST
+};
- /* all edges exist so this is a clique */
- return 1;
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_copyilp)
+void be_init_copyilp(void)
+{
+ lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
+ lc_opt_entry_t *ra_grp = lc_opt_get_grp(be_grp, "ra");
+ lc_opt_entry_t *chordal_grp = lc_opt_get_grp(ra_grp, "chordal");
+ lc_opt_entry_t *co_grp = lc_opt_get_grp(chordal_grp, "co");
+ lc_opt_entry_t *ilp_grp = lc_opt_get_grp(co_grp, "ilp");
+
+ lc_opt_add_table(ilp_grp, options);
}
-/**
- * Iterative finds and 'removes' from the graph all nodes which are
- * simplicial AND not member of a equal-color-wish
- */
-static void pi_find_simplicials(problem_instance_t *pi) {
- set *if_nodes;
- if_node_t *ifn;
- int redo = 1;
+#include "becopyilp_t.h"
+#include "beifg.h"
- DBG((dbg, LEVEL_2, "Find simlicials...\n"));
+/******************************************************************************
+ _____ _ _ _ _
+ / ____(_) | | | | (_)
+ | (___ _ _______ _ __ ___ __| |_ _ ___| |_ _ ___ _ __
+ \___ \| |_ / _ \ | '__/ _ \/ _` | | | |/ __| __| |/ _ \| '_ \
+ ____) | |/ / __/ | | | __/ (_| | |_| | (__| |_| | (_) | | | |
+ |_____/|_/___\___| |_| \___|\__,_|\__,_|\___|\__|_|\___/|_| |_|
- if_nodes = be_ra_get_ifg_nodes(pi->co->chordal_env);
- while (redo) {
- redo = 0;
- for (ifn = set_first(if_nodes); ifn; ifn = set_next(if_nodes)) {
- ir_node *irn = get_irn_for_graph_nr(get_irg(pi->co), ifn->nnr);
- if (!is_removed(irn) && !is_optimizable(get_arch_env(pi->co), irn) && !is_optimizable_arg(pi->co, irn)) {
- if (pi_is_simplicial(pi, ifn)) {
- simpl_t *s = xmalloc(sizeof(*s));
- s->ifn = ifn;
- list_add(&s->chain, &pi->simplicials);
- pset_insert_ptr(pi->removed, irn);
- redo = 1;
- DBG((dbg, LEVEL_2, " Removed %n %d\n", irn, get_irn_graph_nr(irn)));
- }
- }
- }
- }
- if (set_count(be_ra_get_ifg_nodes(pi->co->chordal_env)) == pset_count(pi->removed))
- pi->all_simplicial = 1;
-}
+ *****************************************************************************/
-#ifdef NO_NULL_COLORS
-static void pi_add_constr_no_null_colors(problem_instance_t *pi) {
- int cst_counter=0, col, var_idx, cst_idx;
- int n_colors = pi->co->chordal_env->cls->n_regs;
- char buf[40];
-
- for (col = 0; col < n_colors; ++col) {
- mangle_var1(buf, 'u', col);
-#ifdef NO_NULL_COLORS_WITH_COSTS
- var_idx = lpp_add_var(pi->curr_lp, buf, lpp_binary, 1.0 / (double) (1 << (col+1)) );
-#else
- var_idx = lpp_add_var(pi->curr_lp, buf, lpp_binary, 1.0 / (2.0 * n_colors) );
-#endif
- if (!pi->first_nnc_var_idx)
- pi->first_nnc_var_idx = var_idx;
- }
-#ifdef NO_NULL_COLORS_EXTRA_CSTS
- for (col = 0; col < n_colors; ++col) {
- mangle_cst(buf, 'U', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_greater, 0);
- if (!pi->first_nnc_cst_idx)
- pi->first_nnc_cst_idx = cst_idx;
- lpp_set_factor_fast(pi->curr_lp, cst_idx, pi->first_nnc_var_idx+col, -1);
- }
-#endif
-
-#ifndef NO_NULL_COLORS_WITH_COSTS
- for (col = 0; col < n_colors - 1; ++col) {
- mangle_cst(buf, 'U', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_greater, 0);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, pi->first_nnc_var_idx+col , 1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, pi->first_nnc_var_idx+col+1, -1);
- }
-#endif
+size_red_t *new_size_red(copy_opt_t *co)
+{
+ size_red_t *res = XMALLOC(size_red_t);
-}
-#endif
+ res->co = co;
+ res->all_removed = pset_new_ptr_default();
+ res->col_suff = NULL;
+ obstack_init(&res->ob);
-/**
- * Add coloring-force conditions
- * Matrix A: knapsack constraint for each node
- */
-static void pi_add_constr_A(problem_instance_t *pi) {
- pmap_entry *pme;
-
- DBG((dbg, LEVEL_2, "Add A constraints...\n"));
- /* iterate over all blocks */
- pmap_foreach(pi->co->chordal_env->border_heads, pme) {
- struct list_head *head = pme->value;
- border_t *curr;
- bitset_t *pos_regs = bitset_alloca(pi->co->chordal_env->cls->n_regs);
-
- list_for_each_entry_reverse(border_t, curr, head, list)
- if (curr->is_def && curr->is_real && !is_removed(curr->irn)) {
- int cst_idx, nnr, col;
-
- nnr = get_irn_graph_nr(curr->irn);
- mangle_cst(pi->buf, 'A', nnr);
- cst_idx = lpp_add_cst(pi->curr_lp, pi->buf, lpp_equal, 1);
-
- /* iterate over all possible colors in order */
- bitset_clear_all(pos_regs);
- arch_get_allocatable_regs(get_arch_env(pi->co), curr->irn, arch_pos_make_out(0), pi->co->chordal_env->cls, pos_regs);
- bitset_foreach(pos_regs, col) {
- int var_idx;
- mangle_var2(pi->buf, 'x', nnr, col);
- var_idx = lpp_add_var(pi->curr_lp, pi->buf, lpp_binary, 0);
- if (!pi->first_x_var)
- pi->first_x_var = var_idx;
- pi->last_x_var = var_idx;
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
-#ifdef NO_NULL_COLORS_EXTRA_CSTS
- lpp_set_factor_fast(pi->curr_lp, pi->first_nnc_cst_idx+col, var_idx, 1);
-#endif
- }
- }
- }
+ return res;
}
/**
- * Checks if all nodes in @p living are live in in block @p block.
- * @return 1 if all are live in
- * 0 else
+ * Checks if a node is simplicial in the graph heeding the already removed nodes.
*/
-static INLINE int all_live_in(ir_node *block, pset *living) {
- ir_node *n;
- for (n = pset_first(living); n; n = pset_next(living))
- if (!is_live_in(block, n)) {
- pset_break(living);
- return 0;
- }
- return 1;
-}
+static inline bool sr_is_simplicial(size_red_t *sr, const ir_node *ifn)
+{
+ be_ifg_t *ifg = sr->co->cenv->ifg;
+ neighbours_iter_t iter;
+ ir_node **all = ALLOCAN(ir_node*, be_ifg_degree(ifg, ifn));
+ ir_node *curr;
+ int size = 0;
+ int i;
+ int o;
-/**
- * Finds cliques in the interference graph, considering only nodes
- * for which the color @p color is possible. Finds only 'maximal-cliques',
- * viz cliques which are not contained in another one.
- * Matrix B: interference constraints using cliques
- */
-static void pi_add_constr_B(problem_instance_t *pi, int color) {
- enum phase_t {growing, shrinking} phase = growing;
- border_t *b;
- pmap_entry *pme;
- pset *living = pset_new_ptr(SLOTS_LIVING);
-
- DBG((dbg, LEVEL_2, "Add B constraints (col = %d)...\n", color));
- /* iterate over all blocks */
- pmap_foreach(pi->co->chordal_env->border_heads, pme) {
- ir_node *block = pme->key;
- struct list_head *head = pme->value;
-
- list_for_each_entry_reverse(border_t, b, head, list) {
- const ir_node *irn = b->irn;
- if (is_removed(irn) || !is_color_possible(irn, color))
- continue;
+ /* get all non-removed neighbors */
+ be_ifg_foreach_neighbour(ifg, &iter, ifn, curr)
+ if (!sr_is_removed(sr, curr))
+ all[size++] = curr;
- if (b->is_def) {
- DBG((dbg, LEVEL_2, "Def %n\n", irn));
- pset_insert_ptr(living, irn);
- phase = growing;
- } else { /* is_use */
- DBG((dbg, LEVEL_2, "Use %n\n", irn));
-
- /* before shrinking the set, store the current 'maximum' clique;
- * do NOT if clique is a single node
- * do NOT if all values are live_in (in this case they were contained in a live-out clique elsewhere) */
- if (phase == growing && pset_count(living) >= 2 && !all_live_in(block, living)) {
- int cst_idx;
- ir_node *n;
- mangle_cst(pi->buf, 'B', pi->cst_counter);
-#ifdef NO_NULL_COLORS
- cst_idx = lpp_add_cst(pi->curr_lp, pi->buf, lpp_less, 0);
-#else
- cst_idx = lpp_add_cst(pi->curr_lp, pi->buf, lpp_less, 1);
-#endif
- for (n = pset_first(living); n; n = pset_next(living)) {
- int var_idx;
- mangle_var_irn(pi->buf, 'x', n, color);
- var_idx = lpp_get_var_idx(pi->curr_lp, pi->buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
- }
-#ifdef NO_NULL_COLORS
- lpp_set_factor_fast(pi->curr_lp, cst_idx, pi->first_nnc_var_idx+color, -1.0);
-#endif
- pi->cst_counter++;
- }
- pset_remove_ptr(living, irn);
- phase = shrinking;
- }
- }
- }
- assert(0 == pset_count(living));
- del_pset(living);
-}
+ /* check if these form a clique */
+ for (i=0; i<size; ++i)
+ for (o=i+1; o<size; ++o)
+ if (!be_ifg_connected(ifg, all[i], all[o]))
+ return false;
-/**
- * Generates constraints which interrelate x with y variables.
- * x1 and x2 have the different colors ==> y_12 = 1
- */
-static void pi_add_constr_E(problem_instance_t *pi) {
- unit_t *curr;
- bitset_t *root_regs, *arg_regs, *work_regs;
- int cst_counter = 0;
- unsigned nregs = pi->co->chordal_env->cls->n_regs;
- root_regs = bitset_alloca(nregs);
- arg_regs = bitset_alloca(nregs);
- work_regs = bitset_alloca(nregs);
-
- DBG((dbg, LEVEL_2, "Add E constraints...\n"));
- /* for all roots of optimization units */
- list_for_each_entry(unit_t, curr, &pi->co->units, units) {
- ir_node *root, *arg;
- int rootnr, argnr, color;
- int y_idx, i;
- char buf[32];
-
- root = curr->nodes[0];
- rootnr = get_irn_graph_nr(root);
- bitset_clear_all(root_regs);
- arch_get_allocatable_regs(get_arch_env(pi->co), root, arch_pos_make_out(0), pi->co->chordal_env->cls, root_regs);
-
- /* for all arguments of root */
- for (i = 1; i < curr->node_count; ++i) {
- arg = curr->nodes[i];
- argnr = get_irn_graph_nr(arg);
- bitset_clear_all(arg_regs);
- arch_get_allocatable_regs(get_arch_env(pi->co), arg, arch_pos_make_out(0), pi->co->chordal_env->cls, arg_regs);
-
- /* Introduce new variable and set factor in objective function */
- mangle_var2(buf, 'y', rootnr, argnr);
- y_idx = lpp_add_var(pi->curr_lp, buf, lpp_binary, curr->costs[i]);
-
- /* set starting value */
- lpp_set_start_value(pi->curr_lp, y_idx, (get_irn_col(pi->co, root) != get_irn_col(pi->co, arg)));
-
- /* For all colors root and arg have in common, add 2 constraints to E */
- bitset_copy(work_regs, root_regs);
- bitset_and(work_regs, arg_regs);
- bitset_foreach(work_regs, color) {
- int root_idx, arg_idx, cst_idx;
- mangle_var2(buf, 'x', rootnr, color);
- root_idx = lpp_get_var_idx(pi->curr_lp, buf);
- mangle_var2(buf, 'x', argnr, color);
- arg_idx = lpp_get_var_idx(pi->curr_lp, buf);
-
- /* add root-arg-y <= 0 */
- mangle_cst(buf, 'E', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_less, 0);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, root_idx, 1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, arg_idx, -1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, -1);
-
- /* add arg-root-y <= 0 */
- mangle_cst(buf, 'E', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_less, 0);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, root_idx, -1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, arg_idx, 1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, -1);
- }
- /* For all colors root and arg have "disjunct", add 1 constraints to E.
- * If root gets a color the arg is not possible to get then they will
- * definetly get different colors. So y has to be 1.
- * Vice versa for arg.
- */
- bitset_copy(work_regs, root_regs);
- bitset_xor(work_regs, arg_regs);
- bitset_foreach(work_regs, color) {
- int root_idx, arg_idx, cst_idx;
- mangle_var2(buf, 'x', rootnr, color);
- root_idx = lpp_get_var_idx(pi->curr_lp, buf);
- mangle_var2(buf, 'x', argnr, color);
- arg_idx = lpp_get_var_idx(pi->curr_lp, buf);
-
- mangle_cst(buf, 'E', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_less, 0);
- if (bitset_is_set(root_regs, color)) {
- /* add root-y <= 0 */
- lpp_set_factor_fast(pi->curr_lp, cst_idx, root_idx, 1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, -1);
- } else {
- assert(bitset_is_set(arg_regs, color) && "bitset_xor is buggy");
- /* add arg-y <= 0 */
- lpp_set_factor_fast(pi->curr_lp, cst_idx, arg_idx, 1);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, -1);
- }
- }
- }
- }
+ /* all edges exist so this is a clique */
+ return true;
}
-static INLINE int get_costs(problem_instance_t *pi, ir_node *phi, ir_node *irn) {
- int i;
- unit_t *curr;
- /* search optimization unit for phi */
- list_for_each_entry(unit_t, curr, &pi->co->units, units)
- if (curr->nodes[0] == phi) {
- for (i=1; i<curr->node_count; ++i)
- if (curr->nodes[i] == irn)
- return curr->costs[i];
- assert(0 && "irn must occur in this ou");
- }
- assert(0 && "phi must be found in a ou");
- return 0;
-}
+void sr_remove(size_red_t *sr)
+{
+ ir_node *irn;
+ bool redo = true;
+ const be_ifg_t *ifg = sr->co->cenv->ifg;
+ nodes_iter_t iter;
-static void clique_path_walker(ir_node *block, void *env) {
- problem_instance_t *pi = env;
- int count, arity, row, col, other_row, *costs;
- ir_node **phis, *phi, *irn, **phi_matrix;
- pset *done;
- bitset_t *candidates;
-
- /* Count all phi nodes of this block */
- for (count=0, irn = sched_first(block); is_Phi(irn); irn = sched_next(irn))
- count++;
-
- /* We at least 2 phi nodes for this class of inequalities */
- if (count < 2)
- return;
-
- /* Build the \Phi-Matrix */
- arity = get_irn_arity(sched_first(block));
- phis = alloca(count * sizeof(*phis));
- costs = alloca(count * sizeof(costs));
- phi_matrix = alloca(count*arity * sizeof(*phi_matrix));
- candidates = bitset_alloca(count);
-
- phi = sched_first(block);
- for (row=0; row<count; ++row) {
- phis[row] = phi;
- for (col=0; col<arity; ++col) {
- ir_node *arg = get_irn_n(phi, col);
- /* Sort out all arguments interfering with its phi */
- if (nodes_interfere(pi->co->chordal_env, phi, arg)) {
- phi_matrix[row*arity + col] = NULL;
- } else
- phi_matrix[row*arity + col] = arg;
- }
- phi = sched_next(phi);
- }
+ while (redo) {
+ redo = false;
+ be_ifg_foreach_node(ifg, &iter, irn) {
+ const arch_register_req_t *req = arch_get_irn_register_req(irn);
+ coloring_suffix_t *cs;
- /* Now find the interesting patterns in the matrix:
- * All nodes which are used at least twice in a column. */
- /* columnwise ... */
- for (col=0; col<arity; ++col) {
- done = pset_new_ptr_default();
- for (row=0; row<count; ++row) {
- irn = phi_matrix[row*arity + col];
- /*
- * is this an interfering arg (NULL)
- * or has the irn already been processed in this col?
- */
- if (!irn || pset_find_ptr(done, irn))
+ if (arch_register_req_is(req, limited) || sr_is_removed(sr, irn))
continue;
- else
- pset_insert_ptr(done, irn);
-
- /* insert irn in candidates */
- bitset_clear_all(candidates);
- bitset_set(candidates, row);
- /* search the irn in the rows below */
- for (other_row = row+1; other_row<count; ++other_row)
- if (irn == phi_matrix[other_row*arity + col]) {
- /* found the irn in the same col in another row */
- bitset_set(candidates, other_row);
- }
-
- /* now we know all occurences of irn in this col */
- if (bitset_popcnt(candidates) < 2)
+ if (co_gs_is_optimizable(sr->co, irn))
+ continue;
+ if (!sr_is_simplicial(sr, irn))
continue;
- /* generate an unequation finally.
- * phis are indexed in the bitset,
- * shared argument is irn
- * rhs is phi_count - 1 */
- {
- char buf[32];
- ir_node *root;
- int pos, irnnr, rootnr, cst_idx, y_idx, cst_counter = 0;
- int minimal_unequal_count = bitset_popcnt(candidates)-1;
-
- irnnr = get_irn_graph_nr(irn);
- mangle_cst(buf, 'M', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_greater, minimal_unequal_count);
-
- /* for all phis */
- bitset_foreach(candidates, pos) {
- root = phis[pos];
- rootnr = get_irn_graph_nr(root);
- mangle_var2(buf, 'y', rootnr, irnnr);
- y_idx = lpp_get_var_idx(pi->curr_lp, buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, 1);
- }
- }
- }
- del_pset(done); /* clear set for next row */
- } /*next col*/
-}
+ cs = OALLOC(&sr->ob, coloring_suffix_t);
+ cs->irn = irn;
+ cs->next = sr->col_suff;
+ sr->col_suff = cs;
-/**
- * Matrix M: Multi-Arg-Use. Interrelates different \phi-functions
- * in the same block, iff they use the same arg at the same pos.
- * Only one of the phis can get the arg.
- */
-static void pi_add_clique_path_cstr(problem_instance_t *pi) {
- DBG((dbg, LEVEL_2, "Adding clique path constraints...\n"));
- dom_tree_walk_irg(get_irg(pi->co), clique_path_walker, NULL, pi);
-}
+ pset_insert_ptr(sr->all_removed, irn);
-#ifndef PATH_CONSTRAINTS_FOR_CLASSES
-/**
- * Matrix P: Path contraints.
- * If 2 nodes interfere and there is a path of equal-color-edges
- * connecting them, then at least one of those equal-color-edges
- * will break and cause some costs.
- */
-static void pi_add_path_cstr(problem_instance_t *pi) {
- unit_t *curr;
- int cst_counter = 0;
- DBG((dbg, LEVEL_2, "Adding path constraints...\n"));
-
- /* for all optimization units (only phis) */
- list_for_each_entry(unit_t, curr, &pi->co->units, units) {
- int i, o, rootnr;
-
- if (curr->min_nodes_costs == 0)
- continue;
-
- rootnr = get_irn_graph_nr(curr->nodes[0]);
- /* check all argument pairs for interference */
- for (i=1; i<curr->node_count; ++i) {
- const ir_node *arg1 = curr->nodes[i];
- int arg1nr = get_irn_graph_nr(arg1);
- for (o=i+1; o<curr->node_count; ++o) {
- const ir_node *arg2 = curr->nodes[o];
- int arg2nr = get_irn_graph_nr(arg2);
- if (nodes_interfere(pi->co->chordal_env, arg1, arg2)) {
- int cst_idx, y_idx;
- char buf[32];
-
- mangle_cst(buf, 'P', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_greater, 1);
-
- mangle_var2(buf, 'y', rootnr, arg1nr);
- y_idx = lpp_get_var_idx(pi->curr_lp, buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, 1);
-
- mangle_var2(buf, 'y', rootnr, arg2nr);
- y_idx = lpp_get_var_idx(pi->curr_lp, buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, y_idx, 1);
- }
- }
+ redo = true;
}
}
}
-#endif
-#ifdef PATH_CONSTRAINTS_FOR_CLASSES
-static INLINE int get_y_var_idx(problem_instance_t *pi, int nnr1, int nnr2) {
- int res;
- char buf[30];
+void sr_reinsert(size_red_t *sr)
+{
+ coloring_suffix_t *cs;
+ ir_graph *irg = sr->co->irg;
+ be_ifg_t *ifg = sr->co->cenv->ifg;
+ unsigned n_regs = arch_register_class_n_regs(sr->co->cls);
- mangle_var2(buf, 'y', nnr1, nnr2);
- if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
- return res;
+ unsigned *const allocatable_cols = rbitset_alloca(n_regs);
+ be_set_allocatable_regs(irg, sr->co->cls, allocatable_cols);
- mangle_var2(buf, 'y', nnr2, nnr1);
- if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
- return res;
+ unsigned *const possible_cols = rbitset_alloca(n_regs);
+ neighbours_iter_t iter;
- assert(0 && "One of them must work");
-}
+ /* color the removed nodes in right order */
+ for (cs = sr->col_suff; cs; cs = cs->next) {
+ unsigned free_col;
+ ir_node *other;
+ ir_node *irn = cs->irn;
-static void check_ecc_and_add_cut(problem_instance_t *pi, ir_node **path, int length, pset *remain, ir_node *tgt) {
- if (path[length-1] == tgt) { /* we found a path */
- int cst_idx, var_idx, i, nnr1, nnr2;
- char buf[30];
-
- /* add cut to ilp */
- mangle_cst(buf, 'Q', pi->cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_greater, 1);
-
- /* add all vars along the path */
- nnr2 = get_irn_graph_nr(path[0]);
- for (i=1; i<length; ++i) {
- nnr1 = nnr2;
- nnr2 = get_irn_graph_nr(path[i]);
- var_idx = get_y_var_idx(pi, nnr1, nnr2);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
- }
- } else { /* try to extend the path */
- be_chordal_env_t *cenv = pi->co->chordal_env;
- const ir_edge_t *edge;
- ir_node *end = path[length-1];
- ir_node **next = alloca(pset_count(remain) * sizeof(*next));
- int i, o, max, next_pos = 0;
- pset *done = pset_new_ptr_default();
-
- /* find all potential next nodes on path */
- /* args of phis */
- if (is_Phi(end))
- for(i=0, max=get_irn_arity(end); i<max; ++i) {
- ir_node *arg = get_irn_n(end, i);
- if (!pset_find_ptr(done, arg) && pset_find_ptr(remain, arg)) {
- next[next_pos++] = arg;
- pset_insert_ptr(done, arg);
- }
- }
- /* outs of phis and other nodes */
- foreach_out_edge(end, edge) {
- ir_node *user = edge->src;
- if (is_Phi(user) && !pset_find_ptr(done, user) && pset_find_ptr(remain, user)) {
- next[next_pos++] = user;
- pset_insert_ptr(done, user);
- }
- }
- del_pset(done);
+ rbitset_copy(possible_cols, allocatable_cols, n_regs);
+ /* get free color by inspecting all neighbors */
+ be_ifg_foreach_neighbour(ifg, &iter, irn, other) {
+ const arch_register_req_t *cur_req;
+ unsigned cur_col;
- /* delete all potential nodes with interferences to other nodes in the path */
- for (i=0; i<next_pos; ++i) {
- ir_node *nn = next[i];
+ /* only inspect nodes which are in graph right now */
+ if (sr_is_removed(sr, other))
+ continue;
- /* if next is the tgt, it may interfere with path[0],
- * so skip the first check */
- o = (nn == tgt && length > 1) ? 1 : 0;
+ cur_req = arch_get_irn_register_req(other);
+ cur_col = get_irn_col(other);
- for(; o<length; ++o)
- if (nodes_interfere(cenv, nn, path[o])) {
- next[i] = NULL;
- break;
- }
+ /* Invalidate all single size register when it is a large one */
+ do {
+ rbitset_clear(possible_cols, cur_col);
+ ++cur_col;
+ } while ((cur_col % cur_req->width) != 0);
}
- /* now we have all possible nodes in next; impossibles are NULL */
-
- /* try to finish path with all possible nodes */
- for (i=0; i<next_pos; ++i) {
- if (!next[i]) /* this was an impossible node */
- continue;
- path[length] = next[i];
- pset_remove_ptr(remain, next[i]);
- check_ecc_and_add_cut(pi, path, length+1, remain, tgt);
- pset_insert_ptr(remain, next[i]);
+ /* now all bits not set are possible colors */
+ /* take one that matches the alignment constraint */
+ free_col = 0;
+ assert(!rbitset_is_empty(possible_cols, n_regs) && "No free color found. This can not be.");
+ while (true) {
+ free_col = (unsigned)rbitset_next(possible_cols, free_col, true);
+ if (free_col % arch_get_irn_register_req(irn)->width == 0)
+ break;
+ ++free_col;
+ assert(free_col < n_regs);
}
+ set_irn_col(sr->co->cls, irn, free_col);
+ pset_remove_ptr(sr->all_removed, irn); /* irn is back in graph again */
}
}
-static void path_cstr_for_classes_walker(ir_node *irn, void *env) {
- problem_instance_t *pi = env;
- be_chordal_env_t *cenv;
- int i, o, max;
- ir_node *m;
- pset *class = get_phi_class(irn);
- if (!class || pset_find_ptr(pi->done, class))
- return;
-
- pset_insert_ptr(pi->done, class);
-
- /* pset to array */
- max = pset_count(class);
- ir_node **cls = alloca(max * sizeof(*cls));
- for(i=0, m = pset_first(class); m; i++, m = pset_next(class)) {
- DBG((dbg, LEVEL_1, " class member: %+F\n", m));
- cls[i] = m;
- }
-
- cenv = pi->co->chordal_env;
- for(i=0; i<max; ++i) {
- ir_node **path = alloca(max * sizeof(*path));
- pset *remain = pset_new_ptr(8);
- pset_insert_pset_ptr(remain, class);
-
- /* add cls[i] to path and remove it from remainder */
- path[0] = cls[i];
- pset_remove_ptr(remain, cls[i]);
-
- for(o=i+1; o<max; ++o)
- if (nodes_interfere(cenv, cls[i], cls[o]))
- check_ecc_and_add_cut(pi, path, 1, remain, cls[o]);
-
- /* insert back into remainder */
- pset_insert_ptr(remain, cls[i]);
- }
+void free_size_red(size_red_t *sr)
+{
+ del_pset(sr->all_removed);
+ obstack_free(&sr->ob, NULL);
+ free(sr);
}
+/******************************************************************************
+ _____ _ _____ _ _____
+ / ____| (_) |_ _| | | __ \
+ | | __ ___ _ __ ___ _ __ _ ___ | | | | | |__) |
+ | | |_ |/ _ \ '_ \ / _ \ '__| |/ __| | | | | | ___/
+ | |__| | __/ | | | __/ | | | (__ _| |_| |____| |
+ \_____|\___|_| |_|\___|_| |_|\___| |_____|______|_|
-/**
- * Matrix P: Path contraints.
- * If 2 nodes interfere and there is a path of equal-color-edges
- * connecting them, then at least one of those equal-color-edges
- * will break and cause some costs.
- */
-static void pi_add_path_cstr_for_classes(problem_instance_t *pi) {
- DBG((dbg, LEVEL_2, "Adding path constraints for phi classes...\n"));
- pi->cst_counter = 0;
- pi->done = pset_new_ptr_default();
- irg_walk_graph(get_irg(pi->co), path_cstr_for_classes_walker, NULL, pi);
- del_pset(pi->done);
-}
-#endif
+ *****************************************************************************/
-#ifdef PRECOLOR_MAX_CLIQUE
-struct pre_col {
- problem_instance_t *pi;
- pset **clique;
-};
+#include <stdio.h>
-#define has_reg_class(pi,irn) \
- (arch_get_irn_reg_class(pi->co->chordal_env->session_env->main_env->arch_env, \
- irn, arch_pos_make_out(0)) == pi->co->chordal_env->cls)
+ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env)
+{
+ ilp_env_t *res = XMALLOC(ilp_env_t);
-static void preColoringWalker(ir_node *bl, void *env) {
- struct pre_col *e = env;
- pset **clique = e->clique;
- pset *max_clique = clique ? *clique : NULL;
- int max = max_clique ? pset_count(max_clique) : 0;
- problem_instance_t *pi = e->pi;
+ res->co = co;
+ res->build = build;
+ res->apply = apply;
+ res->env = env;
+ res->sr = new_size_red(co);
- int i, n;
- pset *live = pset_new_ptr_default();
- ir_node *irn;
- irn_live_t *li;
-
- /* as always, bring the live end nodes to life here */
- live_foreach(bl, li) {
- if(live_is_end(li) && has_reg_class(pi, li->irn)) {
- pset_insert_ptr(live, irn);
- }
- }
-
- sched_foreach_reverse(bl, irn) {
- int pres = pset_count(live);
-
- if(pres > max) {
- max = pres;
- if(max_clique)
- del_pset(max_clique);
-
- max_clique = pset_new_ptr_default();
- pset_insert_pset_ptr(max_clique, live);
- }
-
-
-
- if(has_reg_class(pi, irn))
- pset_remove_ptr(live, irn);
-
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
- ir_node *op = get_irn_n(irn, i);
- if(has_reg_class(pi, op) && !is_Phi(irn))
- pset_insert_ptr(live, op);
- }
- }
-
- del_pset(live);
- *clique = max_clique;
+ return res;
}
-static void pi_add_constr_preColoring(problem_instance_t *pi) {
- ir_node *irn;
- int cst_counter, color;
- struct pre_col pre_col;
-
- pre_col.clique = NULL;
- pre_col.pi = pi;
+lpp_sol_state_t ilp_go(ilp_env_t *ienv)
+{
+ ir_graph *irg = ienv->co->irg;
- dom_tree_walk_irg(get_irg(pi->co), preColoringWalker, NULL, &pre_col);
+ sr_remove(ienv->sr);
- color = 0;
- for (irn = pset_first(*pre_col.clique); irn; irn = pset_next(*pre_col.clique)) {
- int cst_idx, var_idx, nnr = get_irn_graph_nr(irn);
- char buf[100];
+ ienv->build(ienv);
- mangle_cst(buf, 'K', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_equal, 1);
+ if (dump_flags & DUMP_ILP) {
+ char buf[128];
+ FILE *f;
- mangle_var2(buf, 'x', nnr, color++);
- var_idx = lpp_get_var_idx(pi->curr_lp, buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
- }
-}
-#endif
-
-/**
- * Generate the initial problem matrices and vectors.
- */
-static problem_instance_t *new_pi(const copy_opt_t *co) {
- problem_instance_t *pi;
- int col;
-
- DBG((dbg, LEVEL_2, "Generating new instance...\n"));
- pi = xcalloc(1, sizeof(*pi));
- pi->co = co;
- pi->removed = pset_new_ptr_default();
- INIT_LIST_HEAD(&pi->simplicials);
- pi->dilp = new_lpp(co->name, lpp_minimize);
-
- /* problem size reduction */
- pi_find_simplicials(pi);
- if (pi->all_simplicial)
- return pi;
-
- /* built objective and constraints */
- pi->curr_lp = pi->dilp;
-#ifdef NO_NULL_COLORS
- pi_add_constr_no_null_colors(pi);
-#endif
- pi_add_constr_A(pi);
- for (col = 0; col < pi->co->chordal_env->cls->n_regs; ++col)
- pi_add_constr_B(pi, col);
- pi_add_constr_E(pi);
-
-#ifdef PATH_CONSTRAINTS_FOR_CLASSES
- pi_add_path_cstr_for_classes(pi);
-#else
- pi_add_path_cstr(pi);
-#endif
- pi_add_clique_path_cstr(pi);
-#ifdef PRECOLOR_MAX_CLIQUE
- pi_add_constr_preColoring(pi);
-#endif
-
- return pi;
-}
-
-/**
- * Clean the problem instance
- */
-static void free_pi(problem_instance_t *pi) {
- simpl_t *simpl, *tmp;
-
- DBG((dbg, LEVEL_2, "Free instance...\n"));
- free_lpp(pi->dilp);
- list_for_each_entry_safe(simpl_t, simpl, tmp, &pi->simplicials, chain)
- free(simpl);
- del_pset(pi->removed);
- free(pi);
-}
-
-/**
- * Set starting values for the mip problem according
- * to the current coloring of the graph.
- */
-static void pi_set_start_sol(problem_instance_t *pi) {
- int i;
- char var_name[64];
- DBG((dbg, LEVEL_2, "Set start solution...\n"));
- for (i=pi->first_x_var; i<=pi->last_x_var; ++i) {
- int nnr, col;
- double val;
- /* get variable name */
- lpp_get_var_name(pi->curr_lp, i, var_name, sizeof(var_name));
- /* split into components */
- if (split_var(var_name, &nnr, &col) == 2) {
- assert(get_irn_col(pi->co, get_irn_for_graph_nr(get_irg(pi->co), nnr)) != -1);
- val = (get_irn_col(pi->co, get_irn_for_graph_nr(get_irg(pi->co), nnr)) == col) ? 1 : 0;
- lpp_set_start_value(pi->curr_lp, i, val);
- } else {
- fprintf(stderr, "Variable name is: %s\n", var_name);
- assert(0 && "x vars always look like this 'x123_45'");
+ ir_snprintf(buf, sizeof(buf), "%F_%s-co.ilp", irg,
+ ienv->co->cenv->cls->name);
+ f = fopen(buf, "wt");
+ if (f == NULL) {
+ panic("Couldn't open '%s' for writing", buf);
}
+ lpp_dump_plain(ienv->lp, f);
+ fclose(f);
}
-}
-/**
- * Invoke a solver
- */
-static void pi_solve_ilp(problem_instance_t *pi) {
- pi_set_start_sol(pi);
- double lower_bound = co_get_lower_bound(pi->co) - co_get_inevit_copy_costs(pi->co);
- lpp_set_bound(pi->curr_lp, lower_bound);
-// lpp_solve_net(pi->curr_lp, LPP_HOST, LPP_SOLVER);
- lpp_solve_cplex(pi->curr_lp);
- DBG((dbg, LEVEL_1, "Solution time: %.2f\n", pi->curr_lp->sol_time));
-}
+ lpp_set_time_limit(ienv->lp, time_limit);
+ if (solve_log)
+ lpp_set_log(ienv->lp, stdout);
-/**
- * Set the color of all simplicial nodes removed form
- * the graph before transforming it to an ilp.
- */
-static void pi_set_simplicials(problem_instance_t *pi) {
- simpl_t *simpl, *tmp;
- bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(pi->co->chordal_env->cls));
+ lpp_solve(ienv->lp, be_options.ilp_server, be_options.ilp_solver);
- DBG((dbg, LEVEL_2, "Set simplicials...\n"));
- /* color the simplicial nodes in right order */
- list_for_each_entry_safe(simpl_t, simpl, tmp, &pi->simplicials, chain) {
- int free_col;
- ir_node *other_irn, *irn;
- if_node_t *other, *ifn;
+ //stat_ev_dbl("co_ilp_objval", ienv->lp->objval);
+ //stat_ev_dbl("co_ilp_best_bound", ienv->lp->best_bound);
+ stat_ev_int("co_ilp_iter", lpp_get_iter_cnt(ienv->lp));
+ stat_ev_dbl("co_ilp_sol_time", lpp_get_sol_time(ienv->lp));
- /* get free color by inspecting all neighbors */
- ifn = simpl->ifn;
- irn = get_irn_for_graph_nr(get_irg(pi->co), ifn->nnr);
- bitset_clear_all(used_cols);
- foreach_neighb(ifn, other) {
- other_irn = get_irn_for_graph_nr(get_irg(pi->co), other->nnr);
- if (!is_removed(other_irn)) /* only inspect nodes which are in graph right now */
- bitset_set(used_cols, get_irn_col(pi->co, other_irn));
- }
+ ienv->apply(ienv);
- /* now all bits not set are possible colors */
- free_col = bitset_next_clear(used_cols, 0);
- assert(free_col != -1 && "No free color found. This can not be.");
- set_irn_col(pi->co, irn, free_col);
- pset_remove_ptr(pi->removed, irn); /* irn is back in graph again */
- }
-}
+ sr_reinsert(ienv->sr);
-/**
- * Sets the colors of irns according to the values of variables
- * provided by the solution of the solver.
- */
-static int pi_apply_solution(problem_instance_t *pi) {
- int res = 1, i;
- double *sol;
- lpp_sol_state_t state;
- DBG((dbg, LEVEL_2, "Applying solution...\n"));
-
-#ifdef DO_STAT
- copystat_add_ilp_time((int)(1000.0*lpp_get_sol_time(pi->curr_lp))); //now we have ms
- copystat_add_ilp_vars(lpp_get_var_count(pi->curr_lp));
- copystat_add_ilp_csts(lpp_get_cst_count(pi->curr_lp));
- copystat_add_ilp_iter(lpp_get_iter_cnt(pi->curr_lp));
-#endif
-
- sol = xmalloc((pi->last_x_var - pi->first_x_var + 1) * sizeof(*sol));
- state = lpp_get_solution(pi->curr_lp, sol, pi->first_x_var, pi->last_x_var);
- if (state != lpp_optimal) {
- printf("WARNING %s: Solution state is not 'optimal': %d\n", pi->co->name, state);
- assert(state >= lpp_feasible && "The solution should at least be feasible!");
- res = 0;
- }
- for (i=0; i<pi->last_x_var - pi->first_x_var + 1; ++i) {
- int nnr, col;
- char var_name[64];
-
- if (sol[i] > 1-EPSILON) { /* split varibale name into components */
- lpp_get_var_name(pi->curr_lp, pi->first_x_var+i, var_name, sizeof(var_name));
- if (split_var(var_name, &nnr, &col) == 2) {
- DBG((dbg, LEVEL_2, "Irn %n Idx %d Var %s Val %f\n", get_irn_for_graph_nr(get_irg(pi->co), nnr), i, var_name, sol[i]));
- DBG((dbg, LEVEL_2, "x%d = %d\n", nnr, col));
- set_irn_col(pi->co, get_irn_for_graph_nr(get_irg(pi->co), nnr), col);
- } else
- assert(0 && "This should be a x-var");
- }
- }
- return res;
+ return lpp_get_sol_state(ienv->lp);
}
-int co_ilp_opt(copy_opt_t *co, double time_limit) {
- int res = 1;
- problem_instance_t *pi;
-
- dbg = firm_dbg_register("ir.be.copyoptilp");
- if (!strcmp(co->name, DEBUG_IRG))
- firm_dbg_set_mask(dbg, DEBUG_IRG_LVL_ILP);
- else
- firm_dbg_set_mask(dbg, DEBUG_LVL_ILP);
-
- pi = new_pi(co);
- if (!pi->all_simplicial) {
-#ifdef DUMP_MPS
- char buf[512];
- snprintf(buf, sizeof(buf), "%s.mps", co->name);
- lpp_dump(pi->curr_lp, buf);
-#endif
- lpp_set_time_limit(pi->curr_lp, time_limit);
- pi_solve_ilp(pi);
- res = pi_apply_solution(pi);
- pi_set_simplicials(pi);
- }
- free_pi(pi);
- return res;
+void free_ilp_env(ilp_env_t *ienv)
+{
+ free_size_red(ienv->sr);
+ lpp_free(ienv->lp);
+ free(ienv);
}
projects / libfirm / blobdiff