/**
- * Minimizing copies with an exact algorithm using mixed integer programming (MIP).
- * Problem statement as a 'quadratic 0-1 program with linear constraints' with
- * n binary variables. Constraints are knapsack (enforce color for each node) and
- * cliques of ifg (interference constraints).
- * Transformation into a 'mixed integer program' with n binary variables and
- * additional 2n real variables. Constraints are the above the transformed
- * objective function and 'complementary conditions' for two var classes.
- * @author Daniel Grund
+ * Author: Daniel Grund
+ * Date: 28.02.2006
+ * Copyright: (c) Universitaet Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ *
+ * Common stuff used by all ILP fomulations.
*
- * NOTE: Unfortunately no good solver is available locally (or even for linking)
- * We use CPLEX 9.0 which runs on a machine residing at the Rechenzentrum.
- * @date 12.04.2005
*/
-#include "becopyopt.h"
+#include "bestatevent.h"
-#define DUMP_MPS /**< dumps the problem in "CPLEX"-MPS format. NOT fixed-column-MPS. */
-#undef USE_SOS /**< uses Special Ordered Sets when using MPS */
-#define DO_SOLVE /**< solve the MPS output with CPLEX */
-#undef DUMP_MATRICES /**< dumps all matrices completely. only recommended for small problems */
-#undef DUMP_LP /**< dumps the problem in LP format. 'human-readable' equations etc... */
-#define DELETE_FILES /**< deletes all dumped files after use */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /* HAVE_CONFIG_H */
-/* CPLEX-account related stuff */
-#define SSH_USER_HOST_PATH "kb61@sp-smp.rz.uni-karlsruhe.de"
-#define SSH_PASSWD "!cplex90"
-#define EXPECT_FILENAME "runme" /** name of the expect-script */
+#ifdef WITH_ILP
-#define DEBUG_LVL 0 //SET_LEVEL_1
-static firm_dbg_module_t *dbg = NULL;
+#define DUMP_ILP 1
+#define DUMP_SOL 2
-#define SLOTS_NUM2POS 256
-#define SLOTS_LIVING 32
+static int time_limit = 60;
+static int solve_net = 1;
+static int solve_log = 0;
+static int dump_flags = 0;
-/**
- * A type storing names of the x variables in the form x[NUMBER]_[COLOR]
- */
-typedef struct _x_name_t {
- int n, c;
-} x_name_t;
+#ifdef WITH_LIBCORE
+#include <libcore/lc_opts.h>
+#include <libcore/lc_opts_enum.h>
+static const lc_opt_enum_mask_items_t dump_items[] = {
+ { "ilp", DUMP_ILP },
+ { "sol", DUMP_SOL },
+ { NULL, 0 }
+};
-/**
- * For each node taking part in the opt-problem its position in the
- * x-variable-vector is stored in a set. This set maps the node-nr (given by
- * benumb) to the position in the vector.
- */
-typedef struct _num2pos_t {
- int num, pos;
-} num2pos_t;
+static lc_opt_enum_mask_var_t dump_var = {
+ &dump_flags, dump_items
+};
-/**
- * A type storing the unmodified '0-1 quadratic program' of the form
- * min f = xQx
- * udN: Ax = e
- * Bx <= e
- * x \in {0, 1}
- *
- * This problem is called the original problem
- */
-typedef struct _problem_instance_t {
- ir_graph* irg;
- const char *name;
- int x_dim, A_dim, B_dim; /**< number of: x variables, rows in A, rows in B */
- x_name_t *x; /**< stores the names of the x variables. all possible colors for a node are ordered and occupy consecutive entries. lives in obstack ob. */
- set *num2pos; /**< maps node numbers to positions in x. */
- sp_matrix_t *Q, *A, *B; /**< the (sparse) matrices of this problem */
-
- /* needed only for linearizations */
- int bigM, maxQij, minQij;
-
- /* overhead needed to build this */
- struct obstack ob;
- int curr_color;
- int curr_row;
-} problem_instance_t;
-
-/* Nodes have consecutive numbers so this hash shoud be fine */
-#define HASH_NUM(num) num
-
-static int set_cmp_num2pos(const void *x, const void *y, size_t size) {
- return ((num2pos_t *)x)->num != ((num2pos_t *)y)->num;
-}
+static const lc_opt_table_entry_t options[] = {
+ LC_OPT_ENT_INT ("limit", "time limit for solving in seconds (0 for unlimited, default 60)", &time_limit),
+ LC_OPT_ENT_BOOL ("net", "solve over the net (default: yes)", &solve_net),
+ LC_OPT_ENT_BOOL ("log", "show ilp solving log", &solve_log),
+ LC_OPT_ENT_ENUM_MASK("dump", "dump flags (ilp, sol)", &dump_var),
+ { NULL }
+};
-/**
- * Sets the first position of node with number num to pos.
- * See x_name_t *x in _problem_instance_t.
- */
-static INLINE void pi_set_first_pos(problem_instance_t *pi, int num, int pos) {
- num2pos_t find;
- find.num = num;
- find.pos = pos;
- set_insert(pi->num2pos, &find, sizeof(find), HASH_NUM(num));
+void be_co_ilp_register_options(lc_opt_entry_t *grp)
+{
+ lc_opt_entry_t *ilp_grp = lc_opt_get_grp(grp, "ilp");
+ lc_opt_add_table(ilp_grp, options);
}
+#endif
-/**
- * Get position by number. (First possible color)
- * returns -1 if not found.
- */
-static INLINE int pi_get_first_pos(problem_instance_t *pi, int num) {
- num2pos_t find, *found;
- find.num = num;
- found = set_find(pi->num2pos, &find, sizeof(find), HASH_NUM(num));
- if (found) {
- assert(pi->x[found->pos].n == num && (found->pos == 0 || pi->x[found->pos-1].n != num) && "pi->num2pos is broken!");
- return found->pos;
- } else
- return -1;
-}
-/**
- * Get position by number and color.
- * returns -1 if not found.
- */
-static INLINE int pi_get_pos(problem_instance_t *pi, int num, int col) {
- num2pos_t find, *found;
- find.num = num;
- int pos;
- found = set_find(pi->num2pos, &find, sizeof(find), HASH_NUM(num));
- if (!found)
- return -1;
- pos = found->pos;
- while (pos < pi->x_dim && pi->x[pos].n == num && pi->x[pos].c < col)
- pos++;
-
- if (pi->x[pos].n == num && pi->x[pos].c == col)
- return pos;
- else
- return -1;
-}
+#include "becopyilp_t.h"
+#include "beifg_t.h"
-#ifdef DUMP_MATRICES
-/**
- * Dump the raw matrices of the problem to a file for debugging.
- */
-static void pi_dump_matrices(problem_instance_t *pi) {
- int i;
- FILE *out = ffopen(pi->name, "matrix", "wt");
+/******************************************************************************
+ _____ _ _ _ _
+ / ____(_) | | | | (_)
+ | (___ _ _______ _ __ ___ __| |_ _ ___| |_ _ ___ _ __
+ \___ \| |_ / _ \ | '__/ _ \/ _` | | | |/ __| __| |/ _ \| '_ \
+ ____) | |/ / __/ | | | __/ (_| | |_| | (__| |_| | (_) | | | |
+ |_____/|_/___\___| |_| \___|\__,_|\__,_|\___|\__|_|\___/|_| |_|
- DBG((dbg, LEVEL_1, "Dumping raw...\n"));
- fprintf(out, "\n\nx-names =\n");
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, "%5d %2d\n", pi->x[i].n, pi->x[i].c);
+ *****************************************************************************/
- fprintf(out, "\n\n-Q =\n");
- matrix_dump(pi->Q, out, -1);
- fprintf(out, "\n\nA =\n");
- matrix_dump(pi->A, out, 1);
+size_red_t *new_size_red(copy_opt_t *co) {
+ size_red_t *res = xmalloc(sizeof(*res));
- fprintf(out, "\n\nB =\n");
- matrix_dump(pi->B, out, 1);
+ res->co = co;
+ res->all_removed = pset_new_ptr_default();
+ res->col_suff = NULL;
+ obstack_init(&res->ob);
- fclose(out);
+ return res;
}
-#endif
-#ifdef DUMP_LP
/**
- * Dumps the problem instance as a MILP. The original problem is transformed into:
- * min f = es - Mex
- * udN: Qx -y -s +Me = 0
- * Ax = e
- * Bx <= e
- * y <= 2M(e-x)
- * x \in N y, s >= 0
- *
- * with M >= max sum Q'ij * x_j
- * i j
+ * Checks if a node is simplicial in the graph heeding the already removed nodes.
*/
-static void pi_dump_lp(problem_instance_t *pi) {
- int i, max_abs_Qij;
- matrix_elem_t *e;
- FILE *out = ffopen(pi->name, "lpo", "wt");
-
- DBG((dbg, LEVEL_1, "Dumping lp...\n"));
- /* calc the big M for Q */
- max_abs_Qij = pi->maxQij;
- if (-pi->minQij > max_abs_Qij)
- max_abs_Qij = -pi->minQij;
- pi->bigM = pi->A_dim * max_abs_Qij;
- DBG((dbg, LEVEL_2, "BigM = %d\n", pi->bigM));
-
- /* generate objective function */
- fprintf(out, "min: ");
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, "+s%d_%d -%dx%d_%d ", pi->x[i].n, pi->x[i].c, pi->bigM, pi->x[i].n, pi->x[i].c);
- fprintf(out, ";\n\n");
-
- /* constraints for former objective function */
- for (i=0; i<pi->x_dim; ++i) {
- matrix_foreach_in_row(pi->Q, i, e) {
- int Qio = e->val;
- if (Qio == 1)
- fprintf(out, "+x%d_%d ", pi->x[e->col].n, pi->x[e->col].c);
- else if(Qio == -1)
- fprintf(out, "-x%d_%d ", pi->x[e->col].n, pi->x[e->col].c);
- else
- fprintf(out, "%+dx%d_%d ", Qio, pi->x[e->col].n, pi->x[e->col].c);
- }
- fprintf(out, "-y%d_%d -s%d_%d +%d= 0;\n", pi->x[i].n, pi->x[i].c, pi->x[i].n, pi->x[i].c, pi->bigM);
- }
- fprintf(out, "\n\n");
-
- /* constraints for (special) complementary condition */
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, "y%d_%d <= %d - %dx%d_%d;\n", pi->x[i].n, pi->x[i].c, 2*pi->bigM, 2*pi->bigM, pi->x[i].n, pi->x[i].c);
- fprintf(out, "\n\n");
-
- /* knapsack constraints */
- for (i=0; i<pi->A_dim; ++i) {
- matrix_foreach_in_row(pi->Q, i, e)
- fprintf(out, "+x%d_%d ", pi->x[e->col].n, pi->x[e->col].c);
- fprintf(out, " = 1;\n");
- }
- fprintf(out, "\n\n");
+static INLINE int sr_is_simplicial(size_red_t *sr, const ir_node *ifn) {
+ int i, o, size = 0;
+ ir_node **all, *curr;
+ be_ifg_t *ifg = sr->co->cenv->ifg;
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
- /* interference graph constraints */
- for (i=0; i<pi->B_dim; ++i) {
- matrix_foreach_in_row(pi->Q, i, e)
- fprintf(out, "+x%d_%d ", pi->x[e->col].n, pi->x[e->col].c);
- fprintf(out, " <= 1;\n");
- }
- fprintf(out, "\n\n");
+ all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
- /* integer constraints */
- fprintf(out, "int x%d_%d", pi->x[0].n, pi->x[0].c);
- for (i=1; i<pi->x_dim; ++i)
- fprintf(out, ", x%d_%d", pi->x[i].n, pi->x[i].c);
- fprintf(out, ";\n");
+ /* get all non-removed neighbors */
+ be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
+ if (!sr_is_removed(sr, curr))
+ all[size++] = curr;
+ be_ifg_neighbours_break(ifg, iter);
- fclose(out);
-}
-#endif
+ /* 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 0;
-#ifdef DUMP_MPS
-/**
- * Dumps an mps file representing the problem. This is NOT the old-style,
- * fixed-column format. Some white spaces are important, in general spaces
- * are separators, MARKER-lines are used in COLUMN section to define binaries.
- */
-//BETTER use last 2 fields in COLUMNS section
-static void pi_dump_mps(problem_instance_t *pi) {
- int i, max_abs_Qij;
- matrix_elem_t *e;
- FILE *out = ffopen(pi->name, "mps", "wt");
-
- DBG((dbg, LEVEL_1, "Dumping mps...\n"));
- max_abs_Qij = pi->maxQij;
- if (-pi->minQij > max_abs_Qij)
- max_abs_Qij = -pi->minQij;
- pi->bigM = pi->A_dim * max_abs_Qij;
- DBG((dbg, LEVEL_2, "BigM = %d\n", pi->bigM));
-
- fprintf(out, "NAME %s\n", pi->name);
-
- fprintf(out, "ROWS\n");
- fprintf(out, " N obj\n");
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, " E cQ%d\n", i);
- for (i=0; i<pi->A_dim; ++i)
- fprintf(out, " E cA%d\n", i);
- for (i=0; i<pi->B_dim; ++i)
- fprintf(out, " L cB%d\n", i);
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, " L cy%d\n", i);
-
- fprintf(out, "COLUMNS\n");
- /* the x vars come first */
- /* mark them as binaries */
- fprintf(out, " MARKI0\t'MARKER'\t'INTORG'\n");
-#ifdef USE_SOS
- int sos_cnt = 0;
- fprintf(out, " S1 SOS_%d\t'MARKER'\t'SOSORG'\n", sos_cnt++);
-#endif
- for (i=0; i<pi->x_dim; ++i) {
-#ifdef USE_SOS
- if (i>0 && pi->x[i].n != pi->x[i-1].n) {
- fprintf(out, " SOS_%d\t'MARKER'\t'SOSEND'\n", sos_cnt++);
- fprintf(out, " S1 SOS_%d\t'MARKER'\t'SOSORG'\n", sos_cnt++);
- }
-#endif
- /* participation in objective */
- fprintf(out, " x%d_%d\tobj\t%d\n", pi->x[i].n, pi->x[i].c, -pi->bigM);
- /* in Q */
- matrix_foreach_in_col(pi->Q, i, e)
- fprintf(out, " x%d_%d\tcQ%d\t%d\n", pi->x[i].n, pi->x[i].c, e->row, e->val);
- /* in A */
- matrix_foreach_in_col(pi->A, i, e)
- fprintf(out, " x%d_%d\tcA%d\t%d\n", pi->x[i].n, pi->x[i].c, e->row, e->val);
- /* in B */
- matrix_foreach_in_col(pi->B, i, e)
- fprintf(out, " x%d_%d\tcB%d\t%d\n", pi->x[i].n, pi->x[i].c, e->row, e->val);
- /* in y */
- fprintf(out, " x%d_%d\tcy%d\t%d\n", pi->x[i].n, pi->x[i].c, i, 2*pi->bigM);
- }
-
-#ifdef USE_SOS
- fprintf(out, " SOS_%d\t'MARKER'\t'SOSEND'\n", sos_cnt++);
-#endif
- fprintf(out, " MARKI1\t'MARKER'\t'INTEND'\n"); /* end of marking */
-
- /* next the s vars */
- for (i=0; i<pi->x_dim; ++i) {
- /* participation in objective */
- fprintf(out, " s%d_%d\tobj\t%d\n", pi->x[i].n, pi->x[i].c, 1);
- /* in Q */
- fprintf(out, " s%d_%d\tcQ%d\t%d\n", pi->x[i].n, pi->x[i].c, i, -1);
- }
+ /* all edges exist so this is a clique */
+ return 1;
+}
- /* next the y vars */
- for (i=0; i<pi->x_dim; ++i) {
- /* in Q */
- fprintf(out, " y%d_%d\tcQ%d\t%d\n", pi->x[i].n, pi->x[i].c, i, -1);
- /* in y */
- fprintf(out, " y%d_%d\tcy%d\t%d\n", pi->x[i].n, pi->x[i].c, i, 1);
- }
+void sr_remove(size_red_t *sr) {
+ ir_node *irn;
+ int redo = 1;
+ const be_ifg_t *ifg = sr->co->cenv->ifg;
+ void *iter = be_ifg_nodes_iter_alloca(ifg);
- fprintf(out, "RHS\n");
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, " rhs\tcQ%d\t%d\n", i, -pi->bigM);
- for (i=0; i<pi->A_dim; ++i)
- fprintf(out, " rhs\tcA%d\t%d\n", i, 1);
- for (i=0; i<pi->B_dim; ++i)
- fprintf(out, " rhs\tcB%d\t%d\n", i, 1);
- for (i=0; i<pi->x_dim; ++i)
- fprintf(out, " rhs\tcy%d\t%d\n", i, 2*pi->bigM);
-
- fprintf(out, "ENDATA\n");
- fclose(out);
-
- out = ffopen(pi->name, "mst", "wt");
- fprintf(out, "NAME\n");
- for (i=0; i<pi->x_dim; ++i) {
- int val, n, c;
- n = pi->x[i].n;
- c = pi->x[i].c;
- if (get_irn_color(get_irn_for_graph_nr(pi->irg, n)) == c)
- val = 1;
- else
- val = 0;
- fprintf(out, " x%d_%d\t%d\n", n, c, val);
- }
- fprintf(out, "ENDATA\n");
- fclose(out);
-}
-#endif
+ while (redo) {
+ redo = 0;
+ be_ifg_foreach_node(ifg, iter, irn) {
+ arch_register_req_t req;
-#ifdef DO_SOLVE
-/**
- * Invoke an external solver
- */
-static void pi_solve_ilp(problem_instance_t *pi) {
- FILE *out;
-
- DBG((dbg, LEVEL_1, "Solving with CPLEX@RZ...\n"));
- /* write command file for CPLEX */
- out = ffopen(pi->name, "cmd", "wt");
- fprintf(out, "read %s.mps\n", pi->name);
- fprintf(out, "read %s.mst\n", pi->name);
- fprintf(out, "set mip strategy mipstart 1\n");
- fprintf(out, "set logfile %s.sol\n", pi->name);
- fprintf(out, "optimize\n");
- fprintf(out, "display solution variables 1-%d\n", pi->x_dim);
- fprintf(out, "set logfile cplex.log\n");
- fprintf(out, "quit\n");
- fclose(out);
-
- /* write expect-file for copying problem to RZ */
- out = ffopen(EXPECT_FILENAME, "exp", "wt");
- fprintf(out, "#! /usr/bin/expect\n");
- fprintf(out, "spawn scp %s.mps %s.mst %s.cmd %s:\n", pi->name, pi->name, pi->name, SSH_USER_HOST_PATH);
- fprintf(out, "expect \":\"\n");
- fprintf(out, "send \"%s\\n\"\n", SSH_PASSWD);
- fprintf(out, "interact\n");
-
- fprintf(out, "spawn ssh %s \"./cplex90 < %s.cmd\"\n", SSH_USER_HOST_PATH, pi->name);
- fprintf(out, "expect \":\"\n");
- fprintf(out, "send \"%s\\n\"\n", SSH_PASSWD);
- fprintf(out, "interact\n");
-
- fprintf(out, "spawn scp %s:%s.sol .\n", SSH_USER_HOST_PATH, pi->name);
- fprintf(out, "expect \":\"\n");
- fprintf(out, "send \"%s\\n\"\n", SSH_PASSWD);
- fprintf(out, "interact\n");
- fclose(out);
-
- /* call the expect script */
- chmod(EXPECT_FILENAME ".exp", 0700);
- system(EXPECT_FILENAME ".exp");
-}
+ arch_get_register_req(sr->co->aenv, &req, irn, -1);
-/**
- * Sets the colors of irns according to the values of variables found in the
- * output file of the solver.
- */
-static void pi_apply_solution(problem_instance_t *pi) {
- FILE *in = ffopen(pi->name, "sol", "rt");
+ if (!arch_register_req_is(&req, limited) && !sr_is_removed(sr, irn) && !co_gs_is_optimizable(sr->co, irn)) {
+ if (sr_is_simplicial(sr, irn)) {
+ coloring_suffix_t *cs = obstack_alloc(&sr->ob, sizeof(*cs));
- if (!in)
- return;
- DBG((dbg, LEVEL_1, "Applying solution...\n"));
- while (!feof(in)) {
- char buf[1024];
- int num = -1, col = -1, val = -1;
+ cs->irn = irn;
+ cs->next = sr->col_suff;
+ sr->col_suff = cs;
- //TODO No integer feasible solution exists.
+ pset_insert_ptr(sr->all_removed, irn);
- if (fscanf(in, "x%d_%d %d.%s\n", &num, &col, &val, buf) != 3) {
- while(fscanf(in, "%1020s\n", buf) != 1);
- continue;
- }
- if (val == 1) {
- DBG((dbg, LEVEL_1, "x%d_%d = %d\n", num, col, val));
- set_irn_color(get_irn_for_graph_nr(pi->irg, num), col);
+ redo = 1;
+ }
+ }
}
+ be_ifg_nodes_break(ifg, iter);
}
- fclose(in);
}
-#endif /* DO_SOLVE */
-
-#ifdef DELETE_FILES
-static void pi_delete_files(problem_instance_t *pi) {
- char buf[1024];
- int end = snprintf(buf, sizeof(buf), "%s", pi->name);
- DBG((dbg, LEVEL_1, "Deleting files...\n"));
-#ifdef DUMP_MATRICES
- snprintf(buf+end, sizeof(buf)-end, ".matrix");
- remove(buf);
-#endif
-#ifdef DUMP_MPS
- snprintf(buf+end, sizeof(buf)-end, ".mps");
- remove(buf);
- snprintf(buf+end, sizeof(buf)-end, ".mst");
- remove(buf);
- snprintf(buf+end, sizeof(buf)-end, ".cmd");
- remove(buf);
- remove(EXPECT_FILENAME ".exp");
-#endif
-#ifdef DUMP_LP
- snprintf(buf+end, sizeof(buf)-end, ".lp");
- remove(buf);
-#endif
-}
-#endif
-/**
- * Collects all irns in currently processed register class
- */
-static void pi_collect_x_names(ir_node *block, void *env) {
- problem_instance_t *pi = env;
- struct list_head *head = &get_ra_block_info(block)->border_head;
- border_t *curr;
-
- list_for_each_entry_reverse(border_t, curr, head, list)
- if (curr->is_def && curr->is_real) {
- x_name_t xx;
- pi->A_dim++; /* one knapsack constraint for each node */
-
- xx.n = get_irn_graph_nr(curr->irn);
- pi_set_first_pos(pi, xx.n, pi->x_dim);
- //TODO iterate over all possible colors !!MUST BE IN ORDER!!
- for (xx.c=0; xx.c<MAX_COLORS; ++xx.c) {
- if (!is_possible_color(irn, xx.c))
- continue;
- DBG((dbg, LEVEL_2, "Adding %n %d\n", curr->irn, xx.c));
- obstack_grow(&pi->ob, &xx, sizeof(xx));
- pi->x_dim++; /* one x variable for each node and color */
- }
- }
-}
+void sr_reinsert(size_red_t *sr) {
+ coloring_suffix_t *cs;
+ be_ifg_t *ifg = sr->co->cenv->ifg;
+ bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(sr->co->cls));
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
-/**
- * Checks if all nodes in living are live_out in block block.
- */
-static INLINE int all_live_out(ir_node *block, pset *living) {
- ir_node *n;
- for (n = pset_first(living); n; n = pset_next(living))
- if (!is_live_out(block, n)) {
- pset_break(living);
- return 0;
- }
- return 1;
-}
+ /* color the removed nodes in right order */
+ for (cs = sr->col_suff; cs; cs = cs->next) {
+ int free_col;
+ ir_node *other, *irn;
-/**
- * Finds cliques in the interference graph, considering only nodes
- * for which the color pi->curr_color is possible. Finds only 'maximal-cliques',
- * viz cliques which are not conatained in another one.
- * This is used for the matrix B.
- */
-static void pi_clique_finder(ir_node *block, void *env) {
- problem_instance_t *pi = env;
- enum phase_t {growing, shrinking} phase = growing;
- struct list_head *head = &get_ra_block_info(block)->border_head;
- border_t *b;
- pset *living = pset_new_ptr(SLOTS_LIVING);
-
- list_for_each_entry_reverse(border_t, b, head, list) {
- const ir_node *irn = b->irn;
- if (!is_possible_color(n, pi->curr_col))
- continue;
-
- 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_out */
- if (phase == growing && pset_count(living) >= 2 && !all_live_out(block, living)) {
- ir_node *n;
- for (n = pset_first(living); n; n = pset_next(living)) {
- int pos = pi_get_pos(pi, get_irn_graph_nr(n), pi->curr_color);
- matrix_set(pi->B, pi->curr_row, pos, 1);
- DBG((dbg, LEVEL_2, "B[%d, %d] := %d\n", pi->curr_row, pos, 1));
- }
- pi->curr_row++;
- }
- pset_remove_ptr(living, irn);
- phase = shrinking;
+ /* get free color by inspecting all neighbors */
+ irn = cs->irn;
+ bitset_clear_all(used_cols);
+
+ be_ifg_foreach_neighbour(ifg, iter, irn, other) {
+ if (!sr_is_removed(sr, other)) /* only inspect nodes which are in graph right now */
+ bitset_set(used_cols, get_irn_col(sr->co, other));
}
+ be_ifg_neighbours_break(ifg, iter);
+
+ /* 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(sr->co, irn, free_col);
+ pset_remove_ptr(sr->all_removed, irn); /* irn is back in graph again */
}
+}
- del_pset(living);
+void free_size_red(size_red_t *sr) {
+ del_pset(sr->all_removed);
+ obstack_free(&sr->ob, NULL);
+ free(sr);
}
-/**
- * Generate the initial problem matrices and vectors.
- */
-static problem_instance_t *new_pi(const copy_opt_t *co) {
- DBG((dbg, LEVEL_1, "Generating new instance...\n"));
- problem_instance_t *pi = calloc(1, sizeof(*pi));
- pi->irg = co->irg;
- pi->name = get_entity_name(get_irg_entity(co->irg));
- pi->num2pos = new_set(set_cmp_num2pos, SLOTS_NUM2POS);
- pi->bigM = 1;
-
- /* Vector x
- * one entry per node and possible color */
- obstack_init(&pi->ob);
- dom_tree_walk_irg(co->irg, pi_collect_x_names, NULL, pi);
- pi->x = obstack_finish(&pi->ob);
-
- /* Matrix Q
- * weights for the 'same-color-optimization' target */
- {
- unit_t *curr;
- pi->Q = new_matrix(pi->x_dim, pi->x_dim);
-
- list_for_each_entry(unit_t, curr, &co->units, units) {
- const ir_node *root, *arg;
- int rootnr, argnr;
- unsigned rootpos, argpos;
- int i;
-
- root = curr->nodes[0];
- rootnr = get_irn_graph_nr(root);
- rootpos = pi_get_first_pos(pi, rootnr);
- for (i = 1; i < curr->node_count; ++i) {
- int weight = -get_weight(root, arg);
- arg = curr->nodes[i];
- argnr = get_irn_graph_nr(arg);
- argpos = pi_get_first_pos(pi, argnr);
-
- DBG((dbg, LEVEL_2, "Q[%n, %n] := %d\n", root, arg, weight));
- /* for all colors root and arg have in common, set the weight for
- * this pair in the objective function matrix Q */
- while (rootpos < pi->x_dim && argpos < pi->x_dim &&
- pi->x[rootpos].n == rootnr && pi->x[argpos].n == argnr) {
- if (pi->x[rootpos].c < pi->x[argpos].c)
- ++rootpos;
- else if (pi->x[rootpos].c > pi->x[argpos].c)
- ++argpos;
- else {
- matrix_set(pi->Q, rootpos++, argpos++, weight);
-
- if (weight < pi->minQij) {
- DBG((dbg, LEVEL_2, "minQij = %d\n", weight));
- pi->minQij = weight;
- }
- if (weight > pi->maxQij) {
- DBG((dbg, LEVEL_2, "maxQij = %d\n", weight));
- pi->maxQij = weight;
- }
- }
- }
- }
- }
- }
+/******************************************************************************
+ _____ _ _____ _ _____
+ / ____| (_) |_ _| | | __ \
+ | | __ ___ _ __ ___ _ __ _ ___ | | | | | |__) |
+ | | |_ |/ _ \ '_ \ / _ \ '__| |/ __| | | | | | ___/
+ | |__| | __/ | | | __/ | | | (__ _| |_| |____| |
+ \_____|\___|_| |_|\___|_| |_|\___| |_____|______|_|
- /* Matrix A
- * knapsack constraint for each node */
- {
- int row = 0, col = 0;
- pi->A = new_matrix(pi->A_dim, pi->x_dim);
- while (col < pi->x_dim) {
- int curr_n = pi->x[col].n;
- while (col < pi->x_dim && pi->x[col].n == curr_n) {
- DBG((dbg, LEVEL_2, "A[%d, %d] := %d\n", row, col, 1));
- matrix_set(pi->A, row, col++, 1);
- }
- ++row;
- }
- assert(row == pi->A_dim);
- }
+ *****************************************************************************/
- /* Matrix B
- * interference constraints using exactly those cliques not contained in others. */
- {
- int color, expected_clipques = pi->A_dim/3 * MAX_COLORS;
- pi->B = new_matrix(expected_clipques, pi->x_dim);
- for (color = 0; color < MAX_COLORS; ++color) {
- pi->curr_color = color;
- dom_tree_walk_irg(pi->irg, pi_clique_finder, NULL, pi);
- }
- pi->B_dim = matrix_get_rowcount(pi->B);
- }
+#include <stdio.h>
- return pi;
-}
+ilp_env_t *new_ilp_env(copy_opt_t *co, ilp_callback build, ilp_callback apply, void *env) {
+ ilp_env_t *res = xmalloc(sizeof(*res));
+ assert(res);
-/**
- * clean the problem instance
- */
-static void free_pi(problem_instance_t *pi) {
- del_matrix(pi->Q);
- del_matrix(pi->A);
- del_matrix(pi->B);
- del_set(pi->num2pos);
- obstack_free(&pi->ob, NULL);
- free(pi);
+ res->co = co;
+ res->build = build;
+ res->apply = apply;
+ res->env = env;
+ res->sr = new_size_red(co);
+
+ return res;
}
-void co_ilp_opt(copy_opt_t *co) {
- dbg = firm_dbg_register("ir.be.copyoptilp");
- firm_dbg_set_mask(dbg, DEBUG_LVL);
+lpp_sol_state_t ilp_go(ilp_env_t *ienv) {
+ be_main_env_t *main_env = ienv->co->cenv->birg->main_env;
- problem_instance_t *pi = new_pi(co);
+ sr_remove(ienv->sr);
-#ifdef DUMP_MATRICES
- pi_dump_matrices(pi);
-#endif
+ ienv->build(ienv);
+ lpp_set_time_limit(ienv->lp, time_limit);
-#ifdef DUMP_LP
- pi_dump_lp(pi);
-#endif
+ if(solve_log)
+ lpp_set_log(ienv->lp, stdout);
-#ifdef DUMP_MPS
- pi_dump_mps(pi);
+ if(solve_net)
+ lpp_solve_net(ienv->lp, main_env->options->ilp_server, main_env->options->ilp_solver);
+ else {
+#ifdef LPP_SOLVE_NET
+ fprintf(stderr, "can only solve ilp over the net\n");
+#else
+ lpp_solve_cplex(ienv->lp);
#endif
+ }
-#ifdef DO_SOLVE
- pi_solve_ilp(pi);
- pi_apply_solution(pi);
-#endif
+ be_stat_ev_dbl("co_ilp_objval", ienv->lp->objval);
+ be_stat_ev_dbl("co_ilp_best_bound", ienv->lp->best_bound);
+ be_stat_ev ("co_ilp_iter", ienv->lp->iterations);
+ be_stat_ev_dbl("co_ilp_sol_time", ienv->lp->sol_time);
-#ifdef DELETE_FILES
- pi_delete_files(pi);
-#endif
+ if(dump_flags & DUMP_ILP) {
+ FILE *f = be_chordal_open(ienv->co->cenv, "", "-co.ilp");
+ lpp_dump_plain(ienv->lp, f);
+ fclose(f);
+ }
+
+ ienv->apply(ienv);
+
+ sr_reinsert(ienv->sr);
- free_pi(pi);
+ return lpp_get_sol_state(ienv->lp);
}
+
+void free_ilp_env(ilp_env_t *ienv) {
+ free_size_red(ienv->sr);
+ free_lpp(ienv->lp);
+ free(ienv);
+}
+
+#else /* WITH_ILP */
+
+static INLINE void only_that_you_can_compile_without_WITH_ILP_defined(void) {
+}
+
+#endif /* WITH_ILP */