#include "becopyopt.h"
#include "becopystat.h"
-#define DUMP_MPS
+#undef DUMP_MPS
#define DEBUG_LVL SET_LEVEL_1
static firm_dbg_module_t *dbg = NULL;
+#define EPSILON 0.00001
#define SLOTS_LIVING 32
/**
lpp_t *dilp; /**< problem formulation directly as milp */
/* overhead stuff */
lpp_t *curr_lp; /**< points to the problem currently used */
- int curr_color, cst_counter, last_x_var;
+ int cst_counter, last_x_var;
char buf[32];
int all_simplicial;
} problem_instance_t;
list_add(&s->chain, &pi->simplicials);
pset_insert_ptr(pi->removed, irn);
redo = 1;
- DBG((dbg, LEVEL_2, " Removed %n\n", irn));
+ 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;
}
/**
* Add coloring-force conditions
+ * Matrix A: knapsack constraint for each node
*/
-static void pi_add_constr_A(ir_node *block, void *env) {
- problem_instance_t *pi = env;
- struct list_head *head = get_block_border_head(pi->co->chordal_env, block);
- 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, equal, 1);
-
- // iterate over all possible colors in order
- bitset_clear_all(pos_regs);
- arch_get_allocatable_regs(pi->co->chordal_env->arch_env, curr->irn, arch_pos_make_out(0), pi->co->chordal_env->cls, pos_regs);
- bitset_foreach(pos_regs, col) {
- int var_idx;
- mangle_var(pi->buf, 'x', nnr, col);
- var_idx = lpp_add_var(pi->curr_lp, pi->buf, binary, 0);
- pi->last_x_var = var_idx;
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
+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, equal, 1);
+
+ // iterate over all possible colors in order
+ bitset_clear_all(pos_regs);
+ arch_get_allocatable_regs(pi->co->chordal_env->arch_env, curr->irn, arch_pos_make_out(0), pi->co->chordal_env->cls, pos_regs);
+ bitset_foreach(pos_regs, col) {
+ int var_idx;
+ mangle_var(pi->buf, 'x', nnr, col);
+ var_idx = lpp_add_var(pi->curr_lp, pi->buf, binary, 0);
+ pi->last_x_var = var_idx;
+ lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
+ }
}
- }
+ }
}
/**
/**
* Finds cliques in the interference graph, considering only nodes
- * for which the color pi->curr_color is possible. Finds only 'maximal-cliques',
+ * for which the color @p color is possible. Finds only 'maximal-cliques',
* viz cliques which are not contained in another one.
- * This is used for the matrix B.
+ * Matrix B: interference constraints using cliques
*/
-static void pi_add_constr_B(ir_node *block, void *env) {
- problem_instance_t *pi = env;
+static void pi_add_constr_B(problem_instance_t *pi, int color) {
enum phase_t {growing, shrinking} phase = growing;
- struct list_head *head = get_block_border_head(pi->co->chordal_env, block);
border_t *b;
+ pmap_entry *pme;
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_removed(irn) || !is_color_possible(irn, pi->curr_color))
- 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_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);
- cst_idx = lpp_add_cst(pi->curr_lp, pi->buf, less, 1);
- for (n = pset_first(living); n; n = pset_next(living)) {
- int var_idx;
- mangle_var_irn(pi->buf, 'x', n, pi->curr_color);
- var_idx = lpp_get_var_idx(pi->curr_lp, pi->buf);
- lpp_set_factor_fast(pi->curr_lp, cst_idx, var_idx, 1);
+ 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;
+
+ 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);
+ cst_idx = lpp_add_cst(pi->curr_lp, pi->buf, less, 1);
+ 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);
+ }
+ pi->cst_counter++;
}
- pi->cst_counter++;
+ pset_remove_ptr(living, irn);
+ phase = shrinking;
}
- pset_remove_ptr(living, irn);
- phase = shrinking;
}
}
-
+ assert(0 == pset_count(living));
del_pset(living);
}
+/**
+ * Generates constraints which interrelate x with y variables.
+ * y=1 ==> x1 and x2 must have the same color.
+ * <== is achieved automatically by minimization.
+ */
static void pi_add_constr_E(problem_instance_t *pi) {
unit_t *curr;
bitset_t *root_regs, *arg_regs;
root_regs = bitset_alloca(nregs);
arg_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) {
const ir_node *root, *arg;
}
/**
- * Sum(y_root_arg, arg \in Args) <= max_indep_set_size - 1
+ * Matrix M: maximum independent set constraints
+ * Generates lower bound-cuts for optimization units with inner interferences.
+ * Sum(y_{root, arg}, arg \in Args) <= max_indep_set_size - 1
*/
static void pi_add_constr_M(problem_instance_t *pi) {
unit_t *curr;
int cst_counter = 0;
+ DBG((dbg, LEVEL_2, "Add M constraints...\n"));
/* for all optimization units */
list_for_each_entry(unit_t, curr, &pi->co->units, units) {
*/
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));
/* problem size reduction */
pi_find_simplicials(pi);
//TODO dump_ifg_w/o_removed
- if (set_count(be_ra_get_ifg_nodes(pi->co->chordal_env)) == pset_count(pi->removed))
- pi->all_simplicial = 1;
+ if (pi->all_simplicial)
+ return pi;
+ /* built objective abd constraints */
pi->curr_lp = pi->dilp;
-
- /* Matrix A: knapsack constraint for each node */
- DBG((dbg, LEVEL_2, "Add A constraints...\n"));
- dom_tree_walk_irg(co->chordal_env->irg, pi_add_constr_A, NULL, pi);
- /* Matrix B: interference constraints using cliques */
- DBG((dbg, LEVEL_2, "Add B constraints...\n"));
- for (pi->curr_color = 0; pi->curr_color < pi->co->chordal_env->cls->n_regs; ++pi->curr_color)
- dom_tree_walk_irg(co->chordal_env->irg, pi_add_constr_B, NULL, pi);
- /* Matrix E: interrelate x with y variables */
- DBG((dbg, LEVEL_2, "Add E constraints...\n"));
+ 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);
- /* Matrix M: maximum independent set constraints */
- DBG((dbg, LEVEL_2, "Add M constraints...\n"));
- //pi_add_constr_M(pi);
+ pi_add_constr_M(pi);
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"));
- /* pi->simplicials get freed during apply_solution */
free_lpp(pi->dilp);
+ list_for_each_entry_safe(simpl_t, simpl, tmp, &pi->simplicials, chain)
+ free(simpl);
del_pset(pi->removed);
free(pi);
}
static void pi_solve_ilp(problem_instance_t *pi, void (*lpp_solve)(lpp_t *)) {
pi_set_start_sol(pi);
lpp_solve(pi->curr_lp);
- DBG((dbg, LEVEL_1, "Solution time: %f\n", lpp_get_sol_time(pi->curr_lp)));
}
/**
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 */
- free(simpl);
}
}
DBG((dbg, LEVEL_2, "Applying solution...\n"));
#ifdef DO_STAT
- //TODO stat
+ curr_vals[I_ILP_ITER] += lpp_get_iter_cnt(pi->curr_lp);
+ curr_vals[I_ILP_TIME] += lpp_get_sol_time(pi->curr_lp);
#endif
sol = xmalloc((pi->last_x_var+1) * sizeof(*sol));
state = lpp_get_solution(pi->curr_lp, sol, 1, pi->last_x_var);
if (state != optimal) {
printf("Solution state is not 'optimal': %d\n", state);
- if (state < feasible)
- assert(0);
+ assert(state >= feasible && "The solution should at least be feasible!");
}
- for (i=0; i<pi->last_x_var; ++i)
- if (sol[i] == 1.0) { /* split varibale name into components */
- int nnr, col;
- char var_name[64];
+ for (i=0; i<pi->last_x_var; ++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, 1+i, var_name, sizeof(var_name));
if (split_var(var_name, &nnr, &col) == 2) {
- DBG((dbg, LEVEL_2, " x%d = %d\n", nnr, col));
+ DBG((dbg, LEVEL_2, "Irn %n Idx %d Var %s Val %f\n", get_irn_for_graph_nr(pi->co->chordal_env->irg, 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(pi->co->chordal_env->irg, nnr), col);
} else
assert(0 && "This should be a x-var");
}
+ }
}
void co_ilp_opt(copy_opt_t *co) {
#endif
pi_solve_ilp(pi, lpp_solve_local);
pi_apply_solution(pi);
+ pi_set_simplicials(pi);
}
- pi_set_simplicials(pi);
free_pi(pi);
}
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