#include <malloc.h>
#endif
+#include "debug.h"
#include "xmalloc.h"
-#include "becopyopt.h"
+#include "becopyopt_t.h"
#include "becopystat.h"
#include "bitset.h"
#include "bearch.h"
static INLINE int qnode_are_conflicting(const qnode_t *qn, const ir_node *n1, const ir_node *n2) {
conflict_t c;
/* search for live range interference */
- if (n1!=n2 && nodes_interfere(qn->ou->co->chordal_env, n1, n2))
+ if (n1!=n2 && nodes_interfere(qn->ou->co->cenv, n1, n2))
return 1;
/* search for recoloring conflicts */
if ((int)n1 < (int)n2) {
*
*/
static ir_node *qnode_color_irn(const qnode_t *qn, ir_node *irn, int col, const ir_node *trigger) {
- const be_chordal_env_t *chordal_env = qn->ou->co->chordal_env;
- const arch_register_class_t *cls = chordal_env->cls;
- const arch_env_t *arch_env = chordal_env->main_env->arch_env;
+ copy_opt_t *co = qn->ou->co;
+ const be_chordal_env_t *chordal_env = co->cenv;
+ const arch_register_class_t *cls = co->cls;
+ const arch_env_t *arch_env = co->aenv;
int irn_col = qnode_get_new_color(qn, irn);
ir_node *sub_res, *curr;
be_ifg_t *ifg = chordal_env->ifg;
static void ou_optimize(unit_t *ou) {
int i;
qnode_t *curr = NULL, *tmp;
- arch_env_t *aenv = get_arch_env(ou->co);
- const arch_register_class_t *cls = ou->co->chordal_env->cls;
+ const arch_env_t *aenv = ou->co->aenv;
+ const arch_register_class_t *cls = ou->co->cls;
bitset_t *pos_regs = bitset_alloca(cls->n_regs);
bitset_t *ign_regs = bitset_alloca(cls->n_regs);
free_qnode(curr);
}
-void co_heur_opt(copy_opt_t *co) {
+int co_solve_heuristic(copy_opt_t *co) {
unit_t *curr;
dbg = firm_dbg_register("ir.be.copyoptheur");
ou_optimize(curr);
del_pset(pinned_global);
+
+ return 0;
}
/**
* Author: Daniel Grund
- * Date: 17.05.2005
+ * Date: 28.02.2006
* Copyright: (c) Universitaet Karlsruhe
* Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
- * CVS-ID: $Id$
+ *
+ * Common stuff used by all ILP fomulations.
+ *
*/
-#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;
- ir_node *irn;
-} 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, -1, 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))
-
-#define mangle_var1(buf, prefix, color) \
- snprintf((buf), sizeof(buf), "%c%d", (prefix), (color))
-
-#define mangle_var2(buf, prefix, node_nr, color) \
- snprintf((buf), sizeof(buf), "%c%d_%d", (prefix), (node_nr), (color))
-
-#define mangle_var3(buf, prefix, n1, n2, col) \
- snprintf((buf), sizeof(buf), "%c%d_%d_%d", (prefix), (n1), (n2), (col))
-
-#define mangle_var_irn(buf, prefix, irn, color) \
- mangle_var2((buf), (prefix), get_irn_graph_nr(irn), (color))
-
-#define split_var(var, nnr, col) \
- sscanf(var, "x%d_%d", (nnr), (col))
-
-
-/**
- * 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 ir_node *ifn) {
- int i, o, size = 0;
- ir_node **all, *curr;
- be_ifg_t *ifg = pi->co->chordal_env->ifg;
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
-
- all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
-
- /* get all non-removed neighbors */
- be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
- if (!is_removed(curr))
- all[size++] = curr;
-
- /* 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;
-
- /* all edges exist so this is a clique */
- return 1;
-}
-
-static int irn_cmp(const void *a, const void *b, size_t n)
-{
- return a != b;
-}
-
-/**
- * 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) {
- ir_node *irn;
- int redo = 1;
- int n_nodes = 0;
- const be_ifg_t *ifg = pi->co->chordal_env->ifg;
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
-
- DBG((dbg, LEVEL_2, "Find simlicials...\n"));
-
- while (redo) {
- arch_register_req_t req;
- redo = 0;
- be_ifg_foreach_node(ifg, iter, irn) {
- if (!is_removed(irn) && !is_optimizable(get_arch_env(pi->co), irn, &req) && !is_optimizable_arg(pi->co, irn)) {
- if (pi_is_simplicial(pi, irn)) {
- simpl_t *s = xmalloc(sizeof(*s));
- s->irn = irn;
- list_add(&s->chain, &pi->simplicials);
- pset_insert_ptr(pi->removed, irn);
- redo = 1;
- DBG((dbg, LEVEL_2, " Removed %+F\n", irn));
- }
- }
- }
- }
-
- /* TODO: Count inside the last look */
- be_ifg_foreach_node(ifg, iter, irn) {
- n_nodes++;
- }
-
- if (n_nodes == 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
-
-}
-#endif
-
-/**
- * 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, -1, 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
- }
- }
- }
-}
-
-/**
- * Checks if all nodes in @p living are live in in block @p block.
- * @return 1 if all are live in
- * 0 else
- */
-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;
-}
-
-/**
- * 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;
-
- 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);
-}
-
-/**
- * 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, -1, 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, -1, 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);
- }
- }
- }
- }
-}
-
-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;
-}
-
-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);
- }
-
- /* 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))
- 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)
- 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*/
-}
-
-/**
- * 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);
-}
-
-#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);
- }
- }
- }
- }
-}
-#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];
-
- mangle_var2(buf, 'y', nnr1, nnr2);
- if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
- return res;
-
- mangle_var2(buf, 'y', nnr2, nnr1);
- if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
- return res;
-
- assert(0 && "One of them must work");
- return -1;
-}
-
-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);
-
-
- /* delete all potential nodes with interferences to other nodes in the path */
- for (i=0; i<next_pos; ++i) {
- ir_node *nn = next[i];
-
- /* if next is the tgt, it may interfere with path[0],
- * so skip the first check */
- o = (nn == tgt && length > 1) ? 1 : 0;
-
- for(; o<length; ++o)
- if (nodes_interfere(cenv, nn, path[o])) {
- next[i] = NULL;
- break;
- }
- }
- /* 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]);
- }
- }
-}
-
-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, **cls;
- 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);
- 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]);
- }
-}
-
-
-/**
- * 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;
-};
-
-#define has_reg_class(pi,irn) \
- (arch_get_irn_reg_class(pi->co->chordal_env->session_env->main_env->arch_env, \
- irn, -1) == pi->co->chordal_env->cls)
-
-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;
-
- 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;
-}
-
-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;
-
- dom_tree_walk_irg(get_irg(pi->co), preColoringWalker, NULL, &pre_col);
-
- 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];
-
- mangle_cst(buf, 'K', cst_counter++);
- cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_equal, 1);
-
- 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'");
- }
- }
-}
-
-/**
- * Invoke a solver
- */
-static void pi_solve_ilp(problem_instance_t *pi) {
- double lower_bound;
-
- pi_set_start_sol(pi);
- 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));
-}
-
-/**
- * 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;
- be_ifg_t *ifg = pi->co->chordal_env->ifg;
- bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(pi->co->chordal_env->cls));
- void *iter = be_ifg_neighbours_iter_alloca(ifg);
-
- 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;
-
- /* get free color by inspecting all neighbors */
- irn = simpl->irn;
- bitset_clear_all(used_cols);
-
- be_ifg_foreach_neighbour(ifg, iter, irn, other) {
- if (!is_removed(other)) /* only inspect nodes which are in graph right now */
- bitset_set(used_cols, get_irn_col(pi->co, other));
- }
-
- /* 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 */
- }
-}
-
-/**
- * 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;
-}
-
-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");
-
- 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;
-}
+#include "becopyilp_t.h"
\ No newline at end of file
--- /dev/null
+/**
+ * Author: Daniel Grund
+ * Date: 17.05.2005
+ * Copyright: (c) Universitaet Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * CVS-ID: $Id$
+ *
+ * ILP formalization using:
+ * - 2 classes of vars: Nodes- and optimality variables.
+ * - Clique constraints
+ * - Path constraints
+ * - Clique path constraints
+ */
+
+#include "becopyilp_t.h"
+#include "benumb_t.h"
+#include "belive_t.h"
+#include "irdom_t.h"
+#include "irgwalk.h"
+
+#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
+
+#undef DUMP_MPS
+static firm_dbg_module_t *dbg = NULL;
+#define SLOTS_LIVING 32
+
+
+
+typedef struct _simpl_t {
+ struct list_head chain;
+ ir_node *irn;
+} 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(pi->co->aenv, irn, -1, arch_register_for_index(pi->co->cls, color))
+
+/*
+ * Some stuff for variable name handling.
+ */
+#define mangle_cst(buf, prefix, nr) \
+ snprintf((buf), sizeof(buf), "%c%d", (prefix), (nr))
+
+#define mangle_var1(buf, prefix, color) \
+ snprintf((buf), sizeof(buf), "%c%d", (prefix), (color))
+
+#define mangle_var2(buf, prefix, node_nr, color) \
+ snprintf((buf), sizeof(buf), "%c%d_%d", (prefix), (node_nr), (color))
+
+#define mangle_var3(buf, prefix, n1, n2, col) \
+ snprintf((buf), sizeof(buf), "%c%d_%d_%d", (prefix), (n1), (n2), (col))
+
+#define mangle_var_irn(buf, prefix, irn, color) \
+ mangle_var2((buf), (prefix), get_irn_graph_nr(irn), (color))
+
+#define split_var(var, nnr, col) \
+ sscanf(var, "x%d_%d", (nnr), (col))
+
+
+/**
+ * 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 ir_node *ifn) {
+ int i, o, size = 0;
+ ir_node **all, *curr;
+ be_ifg_t *ifg = pi->co->cenv->ifg;
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
+
+ all = alloca(be_ifg_degree(ifg, ifn) * sizeof(*all));
+
+ /* get all non-removed neighbors */
+ be_ifg_foreach_neighbour(ifg, iter, ifn, curr)
+ if (!is_removed(curr))
+ all[size++] = curr;
+
+ /* 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;
+
+ /* all edges exist so this is a clique */
+ return 1;
+}
+
+static int irn_cmp(const void *a, const void *b, size_t n)
+{
+ return a != b;
+}
+
+/**
+ * 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) {
+ ir_node *irn;
+ int redo = 1;
+ int n_nodes = 0;
+ const be_ifg_t *ifg = pi->co->cenv->ifg;
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
+
+ DBG((dbg, LEVEL_2, "Find simlicials...\n"));
+
+ while (redo) {
+ arch_register_req_t req;
+ redo = 0;
+ be_ifg_foreach_node(ifg, iter, irn) {
+ if (!is_removed(irn) && !co_is_optimizable(pi->co->aenv, irn, &req) && !co_is_optimizable_arg(pi->co, irn)) {
+ if (pi_is_simplicial(pi, irn)) {
+ simpl_t *s = xmalloc(sizeof(*s));
+ s->irn = irn;
+ list_add(&s->chain, &pi->simplicials);
+ pset_insert_ptr(pi->removed, irn);
+ redo = 1;
+ DBG((dbg, LEVEL_2, " Removed %+F\n", irn));
+ }
+ }
+ }
+ }
+
+ /* TODO: Count inside the last look */
+ be_ifg_foreach_node(ifg, iter, irn) {
+ n_nodes++;
+ }
+
+ if (n_nodes == 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
+
+}
+#endif
+
+/**
+ * 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->cenv->border_heads, pme) {
+ struct list_head *head = pme->value;
+ border_t *curr;
+ bitset_t *pos_regs = bitset_alloca(pi->co->cenv->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(pi->co->aenv, curr->irn, -1, 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
+ }
+ }
+ }
+}
+
+/**
+ * Checks if all nodes in @p living are live in in block @p block.
+ * @return 1 if all are live in
+ * 0 else
+ */
+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;
+}
+
+/**
+ * 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->cenv->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);
+#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);
+}
+
+/**
+ * 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->cenv->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(pi->co->aenv, root, -1, 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(pi->co->aenv, arg, -1, 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);
+ }
+ }
+ }
+ }
+}
+
+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;
+}
+
+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->cenv, phi, arg)) {
+ phi_matrix[row*arity + col] = NULL;
+ } else
+ phi_matrix[row*arity + col] = arg;
+ }
+ phi = sched_next(phi);
+ }
+
+ /* 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))
+ 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)
+ 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*/
+}
+
+/**
+ * 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(pi->co->irg, clique_path_walker, NULL, pi);
+}
+
+#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->cenv, 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);
+ }
+ }
+ }
+ }
+}
+#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];
+
+ mangle_var2(buf, 'y', nnr1, nnr2);
+ if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
+ return res;
+
+ mangle_var2(buf, 'y', nnr2, nnr1);
+ if ((res = lpp_get_var_idx(pi->curr_lp, buf)) != -1)
+ return res;
+
+ assert(0 && "One of them must work");
+ return -1;
+}
+
+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->cenv;
+ 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);
+
+
+ /* delete all potential nodes with interferences to other nodes in the path */
+ for (i=0; i<next_pos; ++i) {
+ ir_node *nn = next[i];
+
+ /* if next is the tgt, it may interfere with path[0],
+ * so skip the first check */
+ o = (nn == tgt && length > 1) ? 1 : 0;
+
+ for(; o<length; ++o)
+ if (nodes_interfere(cenv, nn, path[o])) {
+ next[i] = NULL;
+ break;
+ }
+ }
+ /* 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]);
+ }
+ }
+}
+
+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, **cls;
+ 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);
+ 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->cenv;
+ 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]);
+ }
+}
+
+
+/**
+ * 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(pi->co->irg, 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;
+};
+
+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;
+
+ 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;
+}
+
+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;
+
+ dom_tree_walk_irg(get_irg(pi->co), preColoringWalker, NULL, &pre_col);
+
+ 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];
+
+ mangle_cst(buf, 'K', cst_counter++);
+ cst_idx = lpp_add_cst(pi->curr_lp, buf, lpp_equal, 1);
+
+ 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->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(pi->co->irg, nnr)) != -1);
+ val = (get_irn_col(pi->co, get_irn_for_graph_nr(pi->co->irg, 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'");
+ }
+ }
+}
+
+/**
+ * Invoke a solver
+ */
+static void pi_solve_ilp(problem_instance_t *pi) {
+ double lower_bound;
+
+ pi_set_start_sol(pi);
+ 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));
+}
+
+/**
+ * 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;
+ be_ifg_t *ifg = pi->co->cenv->ifg;
+ bitset_t *used_cols = bitset_alloca(arch_register_class_n_regs(pi->co->cls));
+ void *iter = be_ifg_neighbours_iter_alloca(ifg);
+
+ 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;
+
+ /* get free color by inspecting all neighbors */
+ irn = simpl->irn;
+ bitset_clear_all(used_cols);
+
+ be_ifg_foreach_neighbour(ifg, iter, irn, other) {
+ if (!is_removed(other)) /* only inspect nodes which are in graph right now */
+ bitset_set(used_cols, get_irn_col(pi->co, other));
+ }
+
+ /* 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 */
+ }
+}
+
+/**
+ * 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(pi->co->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->irg, nnr), col);
+ } else
+ assert(0 && "This should be a x-var");
+ }
+ }
+ return res;
+}
+
+int co_solve_ilp1(copy_opt_t *co, double time_limit) {
+ int res = 1;
+ problem_instance_t *pi;
+
+ dbg = firm_dbg_register("ir.be.copyoptilp");
+
+ 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;
+}
--- /dev/null
+/**
+ * Author: Daniel Grund
+ * Date: 28.02.2006
+ * Copyright: (c) Universitaet Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ *
+ * ILP formalization using G=(V, E, Q):
+ * - 1 class of variables: equal color vars
+ * - Path constraints
+ * - Clique path constraints
+ *
+ *
+ * \min \sum_{ (i,j) \in Q } w_ij y_ij
+ *
+ * y_ij = 1 (i,j) \in E
+ *
+ * \sum_c y_nc = |C| - 1 n \in N, c \in C
+ *
+ * y_nc = 1 n \in N, c \not\in C(n)
+ *
+ * \sum_{e \in p} y_e >= 1 p \in P path constraints
+ *
+ * \sum_{e \in cp} y_e >= |cp| - 1 cp \in CP clique-path constraints
+ *
+ * y_ij \in N, w_ij \in R^+
+ */
+
+#include "becopyilp_t.h"
+
+int co_solve_ilp2(copy_opt_t *co, double time_limit) {
+ int res = 1;
+
+ return res;
+}
--- /dev/null
+/**
+ * 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.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#endif
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+#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 "irprog.h"
+#include "irdom_t.h"
+#include "iredges_t.h"
+#include "bechordal_t.h"
+#include "becopyopt_t.h"
+#include "becopystat.h"
+#include "besched_t.h"
+#include "phiclass.h"
+
+#define LPP_HOST "i44pc52"
+#define LPP_SOLVER "cplex"
+
+#define MAX(a,b) ((a<b)?(b):(a))
+#define MIN(a,b) ((a<b)?(a):(b))
+#define EPSILON 0.00001
#include <malloc.h>
#endif
+#include <libcore/lc_timing.h>
+
+#include "xmalloc.h"
+#include "debug.h"
+#include "pmap.h"
+#include "irgraph.h"
+#include "irgwalk.h"
#include "irprog.h"
#include "irloop_t.h"
+#include "iredges_t.h"
+#include "phiclass.h"
-#include "xmalloc.h"
+#include "bearch.h"
#include "beutil.h"
-#include "bechordal_t.h"
-#include "becopyopt.h"
+#include "becopyopt_t.h"
#include "becopystat.h"
-static firm_dbg_module_t *dbg = NULL;
-
-#define is_curr_reg_class(irn) \
- (arch_get_irn_reg_class(get_arch_env(co), \
- irn, -1) == co->chordal_env->cls)
-#define MIN(a,b) ((a<b)?(a):(b))
-#define MAX(a,b) ((a<b)?(b):(a))
+static firm_dbg_module_t *dbg = NULL;
/**
* Determines a maximum weighted independent set with respect to
* the interference and conflict edges of all nodes in a qnode.
*/
static int ou_max_ind_set_costs(unit_t *ou) {
- be_chordal_env_t *chordal_env = ou->co->chordal_env;
+ be_chordal_env_t *chordal_env = ou->co->cenv;
ir_node **safe, **unsafe;
int i, o, safe_count, safe_costs, unsafe_count, *unsafe_costs;
bitset_t *curr;
copy_opt_t *co = env;
unit_t *unit;
arch_register_req_t req;
- arch_env_t *aenv = co->chordal_env->main_env->arch_env;
- if (!is_curr_reg_class(irn))
+ if (!is_curr_reg_class(co, irn))
return;
- if (!is_optimizable(get_arch_env(co), irn, &req))
+ if (!co_is_optimizable(co->aenv, irn, &req))
return;
/* Init a new unit */
int o, arg_pos;
ir_node *arg = get_irn_n(irn, i);
- assert(is_curr_reg_class(arg) && "Argument not in same register class.");
+ assert(is_curr_reg_class(co, arg) && "Argument not in same register class.");
if (arg == irn)
continue;
- if (nodes_interfere(co->chordal_env, irn, arg)) {
+ if (nodes_interfere(co->cenv, irn, arg)) {
unit->inevitable_costs += co->get_costs(irn, arg, i);
continue;
}
} else
/* Proj of a perm with corresponding arg */
- if (is_Perm_Proj(get_arch_env(co), irn)) {
- assert(!nodes_interfere(co->chordal_env, irn, get_Copy_src(irn)));
+ if (is_Perm_Proj(co->aenv, irn)) {
+ assert(!nodes_interfere(co->cenv, irn, get_Copy_src(irn)));
unit->nodes = xmalloc(2 * sizeof(*unit->nodes));
unit->costs = xmalloc(2 * sizeof(*unit->costs));
unit->node_count = 2;
} else
/* Src == Tgt of a 2-addr-code instruction */
- if (is_2addr_code(get_arch_env(co), irn, &req)) {
+ if (is_2addr_code(co->aenv, irn, &req)) {
ir_node *other = req.other_same;
- if (!nodes_interfere(co->chordal_env, irn, other)) {
+ if (!nodes_interfere(co->cenv, irn, other)) {
unit->nodes = xmalloc(2 * sizeof(*unit->nodes));
unit->costs = xmalloc(2 * sizeof(*unit->costs));
unit->node_count = 2;
}
}
+void be_copy_opt_init(void) {
+ dbg = firm_dbg_register("ir.be.copyoptmain");
+}
+
copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, int (*get_costs)(ir_node*, ir_node*, int)) {
const char *s1, *s2, *s3;
int len;
dbg = firm_dbg_register("ir.be.copyopt");
co = xcalloc(1, sizeof(*co));
- co->chordal_env = chordal_env;
+ co->cenv = chordal_env;
+ co->aenv = chordal_env->main_env->arch_env;
+ co->irg = chordal_env->irg;
+ co->cls = chordal_env->cls;
co->get_costs = get_costs;
s1 = get_irp_prog_name();
- s2 = get_entity_name(get_irg_entity(get_irg(co)));
+ s2 = get_entity_name(get_irg_entity(co->irg));
s3 = chordal_env->cls->name;
len = strlen(s1) + strlen(s2) + strlen(s3) + 5;
co->name = xmalloc(len);
DBG((dbg, LEVEL_1, "\tCollecting optimization units\n"));
INIT_LIST_HEAD(&co->units);
- irg_walk_graph(get_irg(co), co_collect_units, NULL, co);
+ irg_walk_graph(co->irg, co_collect_units, NULL, co);
return co;
}
}
int is_optimizable_arg(const copy_opt_t *co, ir_node *irn) {
- arch_env_t *aenv = get_arch_env(co);
const ir_edge_t *edge;
- if (arch_irn_is_ignore(aenv, irn))
+ if (arch_irn_is_ignore(co->aenv, irn))
return 0;
foreach_out_edge(irn, edge) {
ir_node *n = edge->src;
- if (!nodes_interfere(co->chordal_env, irn, n) || irn == n) {
+ if (!nodes_interfere(co->cenv, irn, n) || irn == n) {
arch_register_req_t req;
- arch_get_register_req(aenv, &req, n, -1);
+ arch_get_register_req(co->aenv, &req, n, -1);
if(is_Reg_Phi(n) ||
- is_Perm(aenv, n) ||
+ is_Perm(co->aenv, n) ||
(arch_register_req_is(&req, should_be_same) && req.other_same == irn)
)
return 1;
res += curr->inevitable_costs + curr->min_nodes_costs;
return res;
}
+
+
+
+#define DO_HEUR
+#undef DO_CLASSES
+#undef DO_ILP
+
+
+/**
+ * Helpers for saving and restoring colors of nodes.
+ * Used to get dependable and comparable benchmark results.
+ */
+#if (defined(DO_HEUR) && defined(DO_BETTER)) || (defined(DO_HEUR) && defined(DO_ILP)) || (defined(DO_BETTER) && defined(DO_ILP))
+
+typedef struct color_saver {
+ arch_env_t *arch_env;
+ be_chordal_env_t *chordal_env;
+ pmap *saved_colors;
+ int flag; /* 0 save, 1 load */
+} color_save_t;
+
+static void save_load(ir_node *irn, void *env) {
+ color_save_t *saver = env;
+ if (saver->chordal_env->cls == arch_get_irn_reg_class(saver->arch_env, irn, -1)) {
+ if (saver->flag == 0) { /* save */
+ const arch_register_t *reg = arch_get_irn_register(saver->arch_env, irn);
+ pmap_insert(saver->saved_colors, irn, (void *) reg);
+ } else { /*load */
+ arch_register_t *reg = pmap_get(saver->saved_colors, irn);
+ arch_set_irn_register(saver->arch_env, irn, reg);
+ }
+ }
+}
+
+static void save_colors(color_save_t *color_saver) {
+ color_saver->flag = 0;
+ irg_walk_graph(color_saver->chordal_env->irg, save_load, NULL, color_saver);
+}
+
+static void load_colors(color_save_t *color_saver) {
+ color_saver->flag = 1;
+ irg_walk_graph(color_saver->chordal_env->irg, save_load, NULL, color_saver);
+}
+
+#endif /* Need save/load stuff */
+
+
+
+void co_compare_solvers(be_chordal_env_t *chordal_env) {
+ copy_opt_t *co;
+
+#ifdef DO_STAT
+ lc_timer_t *timer;
+ color_save_t saver;
+ int costs, costs_inevit, costs_init, costs_heur, costs_classes, costs_ilp, lower_bound;
+#endif
+
+ co = new_copy_opt(chordal_env, get_costs_loop_depth);
+ DBG((dbg, LEVEL_1, "----> CO: %s\n", co->name));
+ phi_class_compute(chordal_env->irg);
+
+
+#ifdef DO_STAT
+#if (defined(DO_HEUR) && defined(DO_BETTER)) || (defined(DO_HEUR) && defined(DO_ILP)) || (defined(DO_BETTER) && defined(DO_ILP))
+ saver.arch_env = chordal_env->main_env->arch_env;
+ saver.chordal_env = chordal_env;
+ saver.saved_colors = pmap_create();
+ save_colors(&saver);
+#endif
+
+ costs_inevit = co_get_inevit_copy_costs(co);
+ lower_bound = co_get_lower_bound(co);
+ costs_init = co_get_copy_costs(co);
+
+ DBG((dbg, LEVEL_1, "Inevit Costs: %3d\n", costs_inevit));
+ DBG((dbg, LEVEL_1, "Lower Bound: %3d\n", lower_bound));
+ DBG((dbg, LEVEL_1, "Init costs: %3d\n", costs_init));
+
+ copystat_add_inevit_costs(costs_inevit);
+ copystat_add_init_costs(costs_init);
+ copystat_add_max_costs(co_get_max_copy_costs(co));
+#endif
+
+
+#ifdef DO_HEUR
+#ifdef DO_STAT
+ timer = lc_timer_register("heur", NULL);
+ lc_timer_reset_and_start(timer);
+#endif
+
+ co_solve_heuristic(co);
+
+#ifdef DO_STAT
+ lc_timer_stop(timer);
+ costs_heur = co_get_copy_costs(co);
+ DBG((dbg, LEVEL_1, "Heur costs: %3d\n", costs_heur));
+ copystat_add_heur_time(lc_timer_elapsed_msec(timer));
+ copystat_add_heur_costs(costs_heur);
+ assert(lower_bound <= costs_heur);
+#endif
+#endif /* DO_HEUR */
+
+
+
+#ifdef DO_CLASSES
+#ifdef DO_STAT
+#ifdef DO_HEUR
+ load_colors(&saver);
+#endif
+ timer = lc_timer_register("classes", NULL);
+ lc_timer_reset_and_start(timer);
+#endif
+
+ co_classes_opt(co);
+
+#ifdef DO_STAT
+ lc_timer_stop(timer);
+ costs_classes = co_get_copy_costs(co);
+ DBG((dbg, LEVEL_1, "Classes costs: %3d\n", costs_classes));
+ copystat_add_classes_time(lc_timer_elapsed_msec(timer));
+ copystat_add_classes_costs(costs_heur);
+ assert(lower_bound <= costs_classes);
+#endif
+#endif /* DO_CLASSES */
+
+
+
+#ifdef DO_ILP
+#ifdef DO_STAT
+#if defined(DO_HEUR) || defined(DO_CLASSES)
+ load_colors(&saver);
+#endif
+#endif
+
+ co_solve_ilp1(co, 60.0);
+
+#ifdef DO_STAT
+ costs_ilp = co_get_copy_costs(co);
+ DBG((dbg, LEVEL_1, "Opt costs: %3d\n", costs_ilp));
+ copystat_add_opt_costs(costs_ilp);
+ assert(lower_bound <= costs_ilp);
+#endif
+#endif /* DO_ILP */
+
+
+#ifdef DO_STAT
+#if (defined(DO_HEUR) && defined(DO_BETTER)) || (defined(DO_HEUR) && defined(DO_ILP)) || (defined(DO_BETTER) && defined(DO_ILP))
+ pmap_destroy(saver.saved_colors);
+#endif
+#endif
+ free_copy_opt(co);
+}
/**
* Author: Daniel Grund
- * Date: 12.04.2005
+ * Date: 11.04.2005
* Copyright: (c) Universitaet Karlsruhe
* Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
*
- * Header for copy optimization problem. Analysis and set up of the problem.
+ * Main file for the optimization reducing the copies needed for:
+ * - Phi coalescing
+ * - Register-constrained nodes
+ * - Two-address code instructions
*/
#ifndef _BECOPYOPT_H
#define _BECOPYOPT_H
-#include "debug.h"
-#include "obst.h"
-#include "list.h"
-#include "set.h"
-#include "pset.h"
-#include "bitset.h"
-
-#include "irgraph.h"
-#include "irgwalk.h"
#include "irnode.h"
-#include "irdom.h"
-#include "irouts.h"
-
-#include "beutil.h"
-#include "benumb_t.h"
-#include "belive_t.h"
-#include "bechordal_t.h"
-#include "bearch.h"
+#include "bechordal.h"
-#define MIS_HEUR_TRIGGER 8
typedef int(*cost_fct_t)(ir_node*, ir_node*, int);
-/**
- * Data representing the problem of copy minimization.
- */
-typedef struct _copy_opt_t {
- be_chordal_env_t *chordal_env;
- char *name; /**< ProgName__IrgName__RegClass */
- struct list_head units; /**< all units to optimize in specific order */
- cost_fct_t get_costs; /**< function ptr used to get costs for copies */
- struct obstack ob;
-} copy_opt_t;
+typedef struct _copy_opt_t copy_opt_t;
/**
- * A single unit of optimization. Lots of these form a copy-opt problem
+ * Has to be called during the firm init phase
*/
-typedef struct _unit_t {
- struct list_head units; /**< chain for all units */
- copy_opt_t *co; /**< the copy_opt this unit belongs to */
- int node_count; /**< size of the nodes array */
- ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */
- int *costs; /**< costs[i] are arising, if nodes[i] has a different color */
- int inevitable_costs; /**< sum of costs of all args interfering with root */
- int all_nodes_costs; /**< sum of all costs[i] */
- int min_nodes_costs; /**< a lower bound for the costs in costs[], determined by a max indep. set */
- int sort_key; /**< maximum costs. controls the order of ou's in the struct list_head units. */
-
- /* for heuristic */
- struct list_head queue; /**< list of qn's sorted by weight of qn-mis */
-} unit_t;
-
-/* Helpers */
-#define get_arch_env(co) ((co)->chordal_env->main_env->arch_env)
-#define get_irg(co) ((co)->chordal_env->irg)
-#define get_irn_col(co, irn) \
- arch_register_get_index(arch_get_irn_register(get_arch_env(co), irn))
-#define set_irn_col(co, irn, col) \
- arch_set_irn_register(get_arch_env(co), irn, arch_register_for_index(co->chordal_env->cls, col))
-
-
-#define list_entry_units(lh) list_entry(lh, unit_t, units)
-
-#define get_Copy_src(irn) (get_irn_n(get_Proj_pred(irn), get_Proj_proj(irn)))
-#define is_Perm(arch_env, irn) (arch_irn_classify(arch_env, irn) == arch_irn_class_perm)
-#define is_Reg_Phi(irn) (is_Phi(irn) && mode_is_data(get_irn_mode(irn)))
-#define is_Perm_Proj(arch_env, irn) (is_Proj(irn) && is_Perm(arch_env, get_Proj_pred(irn)))
-#define is_2addr_code(arch_env, irn, req) (arch_get_register_req(arch_env, req, irn, -1)->type == arch_register_req_type_should_be_same)
-
+void be_copy_opt_init(void);
/**
- * Generate the problem. Collect all infos and optimizable nodes.
+ * Generate the problem. Collect all information and optimizable nodes.
*/
-copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, int (*get_costs)(ir_node*, ir_node*, int));
+copy_opt_t *new_copy_opt(be_chordal_env_t *chordal_env, cost_fct_t get_costs);
/**
- * Free the space...
+ * Free the space used...
*/
void free_copy_opt(copy_opt_t *co);
-/**
- * Checks if a node is optimizable, viz. has somthing to do with coalescing
- * @param arch The architecture environment
- * @param irn The irn to check
- * @param req A register_requirement structure (used to check for 2-addr-code)
- */
-#define is_optimizable(arch, irn, req) (!arch_irn_is_ignore(arch, irn) && (is_Reg_Phi(irn) || is_Perm_Proj(arch, irn) || is_2addr_code(arch, irn, req)))
-
-/**
- * Checks if the irn is a non-interfering argument of a node which 'is_optimizable'
- */
-int is_optimizable_arg(const copy_opt_t *co, ir_node *irn);
-
/**
* Computes the costs of a copy according to loop depth
* @param pos: the argument position of arg in the root arguments
* @return Must be >= 0 in all cases.
*/
-int get_costs_loop_depth(ir_node *root, ir_node* arg, int pos);
+int co_get_costs_loop_depth(ir_node *root, ir_node* arg, int pos);
/**
* All costs equal 1. Using this will reduce the number of copies.
* @return Must be >= 0 in all cases.
*/
-int get_costs_all_one(ir_node *root, ir_node* arg, int pos);
-
-/**
- * Returns the maximal costs possible, i.e. the costs if all
- * pairs would be assigned different registers.
- */
-int co_get_max_copy_costs(const copy_opt_t *co);
+int co_get_costs_all_one(ir_node *root, ir_node* arg, int pos);
/**
- * Returns the inevitable costs, i.e. the costs of
- * all copy pairs which interfere.
- */
-int co_get_inevit_copy_costs(const copy_opt_t *co);
-
-/**
- * Returns the current costs the copies are causing.
- * The result includes inevitable costs and the costs
- * of the copies regarding the current register allocation
+ * Solves the problem using a heuristic approach
*/
-int co_get_copy_costs(const copy_opt_t *co);
+int co_solve_heuristic(copy_opt_t *co);
/**
- * Returns a lower bound for the costs of copies in this ou.
- * The result includes inevitable costs and the costs of a
- * minimal costs caused by the nodes of the ou.
+ * Solves the problem using mixed integer programming
+ * @returns 1 iff solution state was optimal
*/
-int co_get_lower_bound(const copy_opt_t *co);
+int co_solve_ilp1(copy_opt_t *co, double time_limit);
/**
- * Solves the problem using a heuristic approach
+ * Solves the problem using mixed integer programming
+ * @returns 1 iff solution state was optimal
*/
-void co_heur_opt(copy_opt_t *co);
+int co_solve_ilp2(copy_opt_t *co, double time_limit);
/**
- * Solves the problem using mixed integer programming
- * @returns 1 iff solution state was optimal
+ * Compares different solutions of the same problem
*/
-int co_ilp_opt(copy_opt_t *co, double time_limit);
+void co_compare_solvers(be_chordal_env_t *chordal_env);
#endif
--- /dev/null
+/**
+ * Author: Daniel Grund
+ * Date: 12.04.2005
+ * Copyright: (c) Universitaet Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ *
+ * Header for copy optimization problem. Analysis and set up of the problem.
+ */
+
+#ifndef _BECOPYOPT_T_H
+#define _BECOPYOPT_T_H
+
+#include "list.h"
+#include "bearch.h"
+#include "bechordal_t.h"
+#include "becopyopt.h"
+
+#define MIS_HEUR_TRIGGER 8
+
+/**
+ * Data representing the problem of copy minimization.
+ */
+struct _copy_opt_t {
+ be_chordal_env_t *cenv;
+ const arch_register_class_t *cls;
+ const arch_env_t *aenv;
+ ir_graph *irg;
+ char *name; /**< ProgName__IrgName__RegClass */
+
+ struct list_head units; /**< all units to optimize in specific order */
+ cost_fct_t get_costs; /**< function ptr used to get costs for copies */
+ struct obstack ob;
+};
+
+/**
+ * A single unit of optimization. Lots of these form a copy-opt problem
+ */
+typedef struct _unit_t {
+ struct list_head units; /**< chain for all units */
+ copy_opt_t *co; /**< the copy_opt this unit belongs to */
+ int node_count; /**< size of the nodes array */
+ ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */
+ int *costs; /**< costs[i] are arising, if nodes[i] has a different color */
+ int inevitable_costs; /**< sum of costs of all args interfering with root */
+ int all_nodes_costs; /**< sum of all costs[i] */
+ int min_nodes_costs; /**< a lower bound for the costs in costs[], determined by a max indep. set */
+ int sort_key; /**< maximum costs. controls the order of ou's in the struct list_head units. */
+
+ /* for heuristic */
+ struct list_head queue; /**< list of qn's sorted by weight of qn-mis */
+} unit_t;
+
+/* Helpers */
+#define get_irn_col(co, irn) arch_register_get_index(arch_get_irn_register((co)->aenv, irn))
+#define set_irn_col(co, irn, col) arch_set_irn_register((co)->aenv, irn, arch_register_for_index((co)->cls, col))
+#define is_curr_reg_class(co, irn) (arch_get_irn_reg_class((co)->aenv, irn, -1) == (co)->cls)
+
+#define MIN(a,b) ((a<b)?(a):(b))
+#define MAX(a,b) ((a<b)?(b):(a))
+
+#define list_entry_units(lh) list_entry(lh, unit_t, units)
+
+
+#define get_Copy_src(irn) (get_irn_n(get_Proj_pred(irn), get_Proj_proj(irn)))
+#define is_Perm(arch_env, irn) (arch_irn_classify(arch_env, irn) == arch_irn_class_perm)
+#define is_Reg_Phi(irn) (is_Phi(irn) && mode_is_data(get_irn_mode(irn)))
+#define is_Perm_Proj(arch_env, irn) (is_Proj(irn) && is_Perm(arch_env, get_Proj_pred(irn)))
+#define is_2addr_code(arch_env, irn, req) (arch_get_register_req(arch_env, req, irn, -1)->type == arch_register_req_type_should_be_same)
+
+/**
+ * Checks if a node is optimizable, viz. has somthing to do with coalescing
+ * @param arch The architecture environment
+ * @param irn The irn to check
+ * @param req A register_requirement structure (used to check for 2-addr-code)
+ */
+#define co_is_optimizable(arch, irn, req) (!arch_irn_is_ignore(arch, irn) && (is_Reg_Phi(irn) || is_Perm_Proj(arch, irn) || is_2addr_code(arch, irn, req)))
+
+/**
+ * Checks if the irn is a non-interfering argument of a node which 'is_optimizable'
+ */
+int co_is_optimizable_arg(const copy_opt_t *co, ir_node *irn);
+
+/**
+ * Returns the maximal costs possible, i.e. the costs if all
+ * pairs would be assigned different registers.
+ */
+int co_get_max_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns the inevitable costs, i.e. the costs of
+ * all copy pairs which interfere.
+ */
+int co_get_inevit_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns the current costs the copies are causing.
+ * The result includes inevitable costs and the costs
+ * of the copies regarding the current register allocation
+ */
+int co_get_copy_costs(const copy_opt_t *co);
+
+/**
+ * Returns a lower bound for the costs of copies in this ou.
+ * The result includes inevitable costs and the costs of a
+ * minimal costs caused by the nodes of the ou.
+ */
+int co_get_lower_bound(const copy_opt_t *co);
+
+
+#endif
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