Remove address name SymConsts.
[libfirm] / ir / be / beifg.c
index e42cc6c..126e7e4 100644 (file)
@@ -1,37 +1,38 @@
-/**
- * @file   beifg.c
- * @date   18.11.2005
- * @author Sebastian Hack
+/*
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
  *
- * Copyright (C) 2005 Universitaet Karlsruhe
- * Released under the GPL
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
+ */
+
+/**
+ * @file
+ * @brief       Interface for interference graphs.
+ * @author      Sebastian Hack
+ * @date        18.11.2005
+ * @version     $Id$
  */
-#ifdef HAVE_CONFIG_H
 #include "config.h"
-#endif
 
 #include <stdlib.h>
 
-#ifdef HAVE_MALLOC_H
-#include <malloc.h>
-#endif
-
-#ifdef __linux__
-#include <malloc.h>
-#endif /* __linux__ */
-
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-
-#ifdef WITH_LIBCORE
-#include <libcore/lc_opts.h>
-#include <libcore/lc_opts_enum.h>
-#include <libcore/lc_timing.h>
-#endif /* WITH_LIBCORE */
+#include "lc_opts.h"
+#include "lc_opts_enum.h"
 
+#include "timing.h"
 #include "bitset.h"
-
 #include "irgwalk.h"
 #include "irnode_t.h"
 #include "irprintf.h"
 #include "irbitset.h"
 #include "beifg_t.h"
 #include "beifg_impl.h"
-#include "irphase.h"
 #include "irphase_t.h"
-#include "bechordal.h"
+#include "error.h"
+#include "xmalloc.h"
 
 #include "becopystat.h"
 #include "becopyopt.h"
-#include "beirg_t.h"
+#include "beirg.h"
+#include "bemodule.h"
 
 /** Defines values for the ifg performance test */
 #define BE_CH_PERFORMANCETEST_MIN_NODES (50)
 typedef struct _coloring_t coloring_t;
 
 struct _coloring_t {
-       phase_t ph;
-       const arch_env_t *arch_env;
-       ir_graph *irg;
+       ir_phase         ph;
+       ir_graph         *irg;
 };
 
-size_t (be_ifg_nodes_iter_size)(const void *self)
+size_t (be_ifg_nodes_iter_size)(const be_ifg_t *ifg)
 {
-       const be_ifg_t *ifg = self;
        return ifg->impl->nodes_iter_size;
 }
 
-size_t (be_ifg_neighbours_iter_size)(const void *self)
+size_t (be_ifg_neighbours_iter_size)(const be_ifg_t *ifg)
 {
-       const be_ifg_t *ifg = self;
        return ifg->impl->neighbours_iter_size;
 }
 
-size_t (be_ifg_cliques_iter_size)(const void *self)
+size_t (be_ifg_cliques_iter_size)(const be_ifg_t *ifg)
 {
-       const be_ifg_t *ifg = self;
        return ifg->impl->cliques_iter_size;
 }
 
-static void *regs_irn_data_init(phase_t *ph, ir_node *irn, void *data)
+static void *regs_irn_data_init(ir_phase *ph, const ir_node *irn, void *data)
 {
-       coloring_t *coloring = (coloring_t *) ph;
-       return (void *) arch_get_irn_register(coloring->arch_env, irn);
+       (void)ph;
+       (void)data;
+
+       return (void*)arch_get_irn_register(irn);
 }
 
-coloring_t *coloring_init(coloring_t *c, ir_graph *irg, const arch_env_t *aenv)
+static coloring_t *coloring_init(coloring_t *c, ir_graph *irg)
 {
-       phase_init(&c->ph, "regs_map", irg, PHASE_DEFAULT_GROWTH, regs_irn_data_init);
-       c->arch_env = aenv;
+       phase_init(&c->ph, "regs_map", irg, PHASE_DEFAULT_GROWTH, regs_irn_data_init, NULL);
        c->irg = irg;
        return c;
 }
@@ -101,90 +100,78 @@ static void restore_irn_color(ir_node *irn, void *c)
 {
        coloring_t *coloring = c;
        const arch_register_t *reg = phase_get_irn_data(&coloring->ph, irn);
-       if(reg)
-               arch_set_irn_register(coloring->arch_env, irn, reg);
+       if (reg)
+               arch_set_irn_register(irn, reg);
 }
 
-void coloring_save(coloring_t *c)
+static void coloring_save(coloring_t *c)
 {
        irg_walk_graph(c->irg, NULL, get_irn_color, c);
 }
 
-void coloring_restore(coloring_t *c)
+static void coloring_restore(coloring_t *c)
 {
        irg_walk_graph(c->irg, NULL, restore_irn_color, c);
 }
 
-void (be_ifg_free)(void *self)
+void (be_ifg_free)(be_ifg_t *ifg)
 {
-       be_ifg_t *ifg = self;
-       ifg->impl->free(self);
+       ifg->impl->free(ifg);
 }
 
-int (be_ifg_connected)(const void *self, const ir_node *a, const ir_node *b)
+int (be_ifg_connected)(const be_ifg_t *ifg, const ir_node *a, const ir_node *b)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->connected(self, a, b);
+       return ifg->impl->connected(ifg, a, b);
 }
 
-ir_node *(be_ifg_neighbours_begin)(const void *self, void *iter, const ir_node *irn)
+ir_node *(be_ifg_neighbours_begin)(const be_ifg_t *ifg, void *iter, const ir_node *irn)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->neighbours_begin(self, iter, irn);
+       return ifg->impl->neighbours_begin(ifg, iter, irn);
 }
 
-ir_node *(be_ifg_neighbours_next)(const void *self, void *iter)
+ir_node *(be_ifg_neighbours_next)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->neighbours_next(self, iter);
+       return ifg->impl->neighbours_next(ifg, iter);
 }
 
-void (be_ifg_neighbours_break)(const void *self, void *iter)
+void (be_ifg_neighbours_break)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       ifg->impl->neighbours_break(self, iter);
+       ifg->impl->neighbours_break(ifg, iter);
 }
 
-ir_node *(be_ifg_nodes_begin)(const void *self, void *iter)
+ir_node *(be_ifg_nodes_begin)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->nodes_begin(self, iter);
+       return ifg->impl->nodes_begin(ifg, iter);
 }
 
-ir_node *(be_ifg_nodes_next)(const void *self, void *iter)
+ir_node *(be_ifg_nodes_next)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->nodes_next(self, iter);
+       return ifg->impl->nodes_next(ifg, iter);
 }
 
-void (be_ifg_nodes_break)(const void *self, void *iter)
+void (be_ifg_nodes_break)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       ifg->impl->nodes_break(self, iter);
+       ifg->impl->nodes_break(ifg, iter);
 }
 
-int (be_ifg_cliques_begin)(const void *self, void *iter, ir_node **buf)
+int (be_ifg_cliques_begin)(const be_ifg_t *ifg, void *iter, ir_node **buf)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->cliques_begin(self, iter, buf);
+       return ifg->impl->cliques_begin(ifg, iter, buf);
 }
 
-int (be_ifg_cliques_next)(const void *self, void *iter)
+int (be_ifg_cliques_next)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->cliques_next(self, iter);
+       return ifg->impl->cliques_next(ifg, iter);
 }
 
-void (be_ifg_cliques_break)(const void *self, void *iter)
+void (be_ifg_cliques_break)(const be_ifg_t *ifg, void *iter)
 {
-       const be_ifg_t *ifg = self;
-       ifg->impl->cliques_break(self, iter);
+       ifg->impl->cliques_break(ifg, iter);
 }
 
-int (be_ifg_degree)(const void *self, const ir_node *irn)
+int (be_ifg_degree)(const be_ifg_t *ifg, const ir_node *irn)
 {
-       const be_ifg_t *ifg = self;
-       return ifg->impl->degree(self, irn);
+       return ifg->impl->degree(ifg, irn);
 }
 
 
@@ -193,7 +180,7 @@ int be_ifg_is_simplicial(const be_ifg_t *ifg, const ir_node *irn)
        int degree = be_ifg_degree(ifg, irn);
        void *iter = be_ifg_neighbours_iter_alloca(ifg);
 
-       ir_node **neighbours = xmalloc(degree * sizeof(neighbours[0]));
+       ir_node **neighbours = XMALLOCN(ir_node*, degree);
 
        ir_node *curr;
        int i, j;
@@ -202,9 +189,9 @@ int be_ifg_is_simplicial(const be_ifg_t *ifg, const ir_node *irn)
        be_ifg_foreach_neighbour(ifg, iter, irn, curr)
                neighbours[i++] = curr;
 
-       for(i = 0; i < degree; ++i) {
-               for(j = 0; j < i; ++j)
-                       if(!be_ifg_connected(ifg, neighbours[i], neighbours[j])) {
+       for (i = 0; i < degree; ++i) {
+               for (j = 0; j < i; ++j)
+                       if (!be_ifg_connected(ifg, neighbours[i], neighbours[j])) {
                                free(neighbours);
                                return 0;
                        }
@@ -244,7 +231,7 @@ void be_ifg_check(const be_ifg_t *ifg)
                {
                        ir_printf("%+F; ", m);
                        neighbours_count++;
-                       if(!be_ifg_connected(ifg, n, m))
+                       if (!be_ifg_connected(ifg, n, m))
                                ir_fprintf(stderr, "%+F is a neighbour of %+F but they are not connected!\n", n, m);
                }
        }
@@ -270,8 +257,8 @@ static int be_ifg_check_cmp_nodes(const void *a, const void *b)
        const ir_node *node_a = *(ir_node **)a;
        const ir_node *node_b = *(ir_node **)b;
 
-       long nr_a = get_irn_node_nr(node_a);
-       long nr_b = get_irn_node_nr(node_b);
+       long nr_a = get_irn_idx(node_a);
+       long nr_b = get_irn_idx(node_b);
 
        return QSORT_CMP(nr_a, nr_b);
 }
@@ -285,11 +272,11 @@ void be_ifg_check_sorted(const be_ifg_t *ifg)
        const int node_count = be_ifg_check_get_node_count(ifg);
        int i = 0;
 
-       ir_node **all_nodes = xmalloc(node_count * sizeof(all_nodes[0]));
+       ir_node **all_nodes = XMALLOCN(ir_node*, node_count);
 
        be_ifg_foreach_node(ifg, iter1, n)
        {
-               if(!node_is_in_irgs_storage(ifg->env->irg, n))
+               if (!node_is_in_irgs_storage(ifg->env->irg, n))
                {
                        ir_printf("+%F is in ifg but not in the current irg!", n);
                        assert (node_is_in_irgs_storage(ifg->env->irg, n));
@@ -303,7 +290,7 @@ void be_ifg_check_sorted(const be_ifg_t *ifg)
 
        for (i = 0; i < node_count; i++)
        {
-               ir_node **neighbours = xmalloc(node_count * sizeof(neighbours[0]));
+               ir_node **neighbours = XMALLOCN(ir_node*, node_count);
                int j = 0;
                int k = 0;
                int degree = 0;
@@ -320,7 +307,7 @@ void be_ifg_check_sorted(const be_ifg_t *ifg)
 
                ir_printf("%d. %+F's neighbours(%d): ", i+1, all_nodes[i], degree);
 
-               for(k = 0; k < j; k++)
+               for (k = 0; k < j; k++)
                {
                        ir_printf("%+F, ", neighbours[k]);
                }
@@ -343,11 +330,11 @@ void be_ifg_check_sorted_to_file(const be_ifg_t *ifg, FILE *f)
        const int node_count = be_ifg_check_get_node_count(ifg);
        int i = 0;
 
-       ir_node **all_nodes = xmalloc(node_count * sizeof(all_nodes[0]));
+       ir_node **all_nodes = XMALLOCN(ir_node*, node_count);
 
        be_ifg_foreach_node(ifg, iter1, n)
        {
-               if(!node_is_in_irgs_storage(ifg->env->irg, n))
+               if (!node_is_in_irgs_storage(ifg->env->irg, n))
                {
                        ir_fprintf (f,"+%F is in ifg but not in the current irg!",n);
                        assert (node_is_in_irgs_storage(ifg->env->irg, n));
@@ -361,7 +348,7 @@ void be_ifg_check_sorted_to_file(const be_ifg_t *ifg, FILE *f)
 
        for (i = 0; i < node_count; i++)
        {
-               ir_node **neighbours = xmalloc(node_count * sizeof(neighbours[0]));
+               ir_node **neighbours = XMALLOCN(ir_node*, node_count);
                int j = 0;
                int k = 0;
                int degree = 0;
@@ -378,7 +365,7 @@ void be_ifg_check_sorted_to_file(const be_ifg_t *ifg, FILE *f)
 
                ir_fprintf (f,"%d. %+F's neighbours(%d): ", i+1, all_nodes[i], degree);
 
-               for(k = 0; k < j; k++)
+               for (k = 0; k < j; k++)
                {
                        ir_fprintf (f,"%+F, ", neighbours[k]);
                }
@@ -394,7 +381,6 @@ void be_ifg_check_sorted_to_file(const be_ifg_t *ifg, FILE *f)
 
 void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 {
-#ifdef WITH_LIBCORE
        int tests = BE_CH_PERFORMANCETEST_COUNT;
        coloring_t coloring;
 
@@ -405,30 +391,30 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
        copy_opt_t *co;
        be_ifg_t *old_if = chordal_env->ifg;
 
-       lc_timer_t *timer = lc_timer_register("getTime","get Time of copy minimization using the ifg");
+       ir_timer_t *timer = ir_timer_new();
        unsigned long elapsed_usec = 0;
 
        if (get_irg_estimated_node_cnt(chordal_env->irg) >= BE_CH_PERFORMANCETEST_MIN_NODES)
        {
-               coloring_init(&coloring, chordal_env->irg, chordal_env->birg->main_env->arch_env);
+               coloring_init(&coloring, chordal_env->irg);
                coloring_save(&coloring);
 
-               lc_timer_reset(timer);
+               ir_timer_reset(timer);
 
                for (i = 0; i<tests; i++) /* performance test with std */
                {
 
-                       used_memory = lc_get_heap_used_bytes();
+                       used_memory = ir_get_heap_used_bytes();
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        chordal_env->ifg = be_ifg_std_new(chordal_env);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
-                       used_memory = lc_get_heap_used_bytes() - used_memory;
+                       used_memory = ir_get_heap_used_bytes() - used_memory;
 
                        coloring_restore(&coloring);
 
@@ -437,13 +423,13 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
                        co_build_ou_structure(co);
                        co_build_graph_structure(co);
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        co_solve_heuristic_new(co);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
                        co_free_graph_structure(co);
                        co_free_ou_structure(co);
@@ -452,7 +438,7 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                }
 
-               elapsed_usec = lc_timer_elapsed_usec(timer);
+               elapsed_usec = ir_timer_elapsed_usec(timer);
                /* calculating average */
                elapsed_usec = elapsed_usec / tests;
 
@@ -463,17 +449,17 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                for (i = 0; i<tests; i++)  /* performance test with clique */
                {
-                       used_memory = lc_get_heap_used_bytes();
+                       used_memory = ir_get_heap_used_bytes();
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        chordal_env->ifg = be_ifg_clique_new(chordal_env);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
-                       used_memory = lc_get_heap_used_bytes() - used_memory;
+                       used_memory = ir_get_heap_used_bytes() - used_memory;
 
                        coloring_restore(&coloring);
 
@@ -482,13 +468,13 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
                        co_build_ou_structure(co);
                        co_build_graph_structure(co);
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        co_solve_heuristic_new(co);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
                        co_free_graph_structure(co);
                        co_free_ou_structure(co);
@@ -497,7 +483,7 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                }
 
-               elapsed_usec = lc_timer_elapsed_usec(timer);
+               elapsed_usec = ir_timer_elapsed_usec(timer);
                /* calculating average */
                elapsed_usec = elapsed_usec / tests;
 
@@ -508,17 +494,17 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                for (i = 0; i<tests; i++)  /* performance test with list */
                {
-                       used_memory = lc_get_heap_used_bytes();
+                       used_memory = ir_get_heap_used_bytes();
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        chordal_env->ifg = be_ifg_list_new(chordal_env);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
-                       used_memory = lc_get_heap_used_bytes() - used_memory;
+                       used_memory = ir_get_heap_used_bytes() - used_memory;
 
                        coloring_restore(&coloring);
 
@@ -527,13 +513,13 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
                        co_build_ou_structure(co);
                        co_build_graph_structure(co);
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        co_solve_heuristic_new(co);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
                        co_free_graph_structure(co);
                        co_free_ou_structure(co);
@@ -542,7 +528,7 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                }
 
-               elapsed_usec = lc_timer_elapsed_usec(timer);
+               elapsed_usec = ir_timer_elapsed_usec(timer);
                /* calculating average */
                elapsed_usec = elapsed_usec / tests;
 
@@ -553,17 +539,17 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                for (i = 0; i<tests; i++)  /* performance test with pointer */
                {
-                       used_memory = lc_get_heap_used_bytes();
+                       used_memory = ir_get_heap_used_bytes();
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
-                       used_memory = lc_get_heap_used_bytes() - used_memory;
+                       used_memory = ir_get_heap_used_bytes() - used_memory;
 
                        coloring_restore(&coloring);
 
@@ -572,13 +558,13 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
                        co_build_ou_structure(co);
                        co_build_graph_structure(co);
 
-                       rt = lc_timer_enter_high_priority();
-                       lc_timer_start(timer);
+                       rt = ir_timer_enter_high_priority();
+                       ir_timer_start(timer);
 
                        co_solve_heuristic_new(co);
 
-                       lc_timer_stop(timer);
-                       rt = lc_timer_leave_high_priority();
+                       ir_timer_stop(timer);
+                       rt = ir_timer_leave_high_priority();
 
                        co_free_graph_structure(co);
                        co_free_ou_structure(co);
@@ -587,7 +573,7 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
 
                }
 
-               elapsed_usec = lc_timer_elapsed_usec(timer);
+               elapsed_usec = ir_timer_elapsed_usec(timer);
                /* calculating average */
                elapsed_usec = elapsed_usec / tests;
 
@@ -599,7 +585,8 @@ void be_ifg_check_performance(be_chordal_env_t *chordal_env)
        }
 
        chordal_env->ifg = old_if;
-#endif /* WITH_LIBCORE */
+
+       ir_timer_free(timer);
 }
 
 void be_ifg_dump_dot(be_ifg_t *ifg, ir_graph *irg, FILE *file, const be_ifg_dump_dot_cb_t *cb, void *self)
@@ -611,19 +598,19 @@ void be_ifg_dump_dot(be_ifg_t *ifg, ir_graph *irg, FILE *file, const be_ifg_dump
        ir_node *n, *m;
 
        fprintf(file, "graph G {\n\tgraph [");
-       if(cb->graph_attr)
+       if (cb->graph_attr)
                cb->graph_attr(file, self);
        fprintf(file, "];\n");
 
-       if(cb->at_begin)
+       if (cb->at_begin)
                cb->at_begin(file, self);
 
        be_ifg_foreach_node(ifg, nodes_it, n) {
-               if(cb->is_dump_node && cb->is_dump_node(self, n)) {
+               if (cb->is_dump_node && cb->is_dump_node(self, n)) {
                        int idx = get_irn_idx(n);
                        bitset_set(nodes, idx);
                        fprintf(file, "\tnode [");
-                       if(cb->node_attr)
+                       if (cb->node_attr)
                                cb->node_attr(file, self, n);
                        fprintf(file, "]; n%d;\n", idx);
                }
@@ -635,73 +622,196 @@ void be_ifg_dump_dot(be_ifg_t *ifg, ir_graph *irg, FILE *file, const be_ifg_dump
                        int n_idx = get_irn_idx(n);
                        int m_idx = get_irn_idx(m);
 
-                       if(n_idx < m_idx && bitset_is_set(nodes, n_idx) && bitset_is_set(nodes, m_idx)) {
+                       if (n_idx < m_idx && bitset_is_set(nodes, n_idx) && bitset_is_set(nodes, m_idx)) {
                                fprintf(file, "\tn%d -- n%d [", n_idx, m_idx);
-                               if(cb->edge_attr)
+                               if (cb->edge_attr)
                                        cb->edge_attr(file, self, n, m);
                                fprintf(file, "];\n");
                        }
                }
        }
 
-       if(cb->at_end)
+       if (cb->at_end)
                cb->at_end(file, self);
 
        fprintf(file, "}\n");
        bitset_free(nodes);
 }
 
-static void int_comp_rec(const be_chordal_env_t *cenv, ir_node *n, bitset_t *seen)
+static void int_comp_rec(be_ifg_t *ifg, ir_node *n, bitset_t *seen)
 {
-       void *neigh_it  = be_ifg_neighbours_iter_alloca(cenv->ifg);
+       void    *neigh_it = be_ifg_neighbours_iter_alloca(ifg);
        ir_node *m;
 
-       be_ifg_foreach_neighbour(cenv->ifg, neigh_it, n, m) {
-               if(!bitset_contains_irn(seen, m) && !arch_irn_is(cenv->birg->main_env->arch_env, m, ignore)) {
-                       bitset_add_irn(seen, m);
-                       int_comp_rec(cenv, m, seen);
-               }
+       be_ifg_foreach_neighbour(ifg, neigh_it, n, m) {
+               if (bitset_contains_irn(seen, m))
+                       continue;
+
+               if (arch_get_register_req_out(m)->type & arch_register_req_type_ignore)
+                       continue;
+
+               bitset_add_irn(seen, m);
+               int_comp_rec(ifg, m, seen);
        }
 
 }
 
-static int int_component_stat(const be_chordal_env_t *cenv)
+static int int_component_stat(be_irg_t *birg, be_ifg_t *ifg)
 {
-       int n_comp     = 0;
-       void *nodes_it = be_ifg_nodes_iter_alloca(cenv->ifg);
-       bitset_t *seen = bitset_irg_malloc(cenv->irg);
+       int      n_comp    = 0;
+       void     *nodes_it = be_ifg_nodes_iter_alloca(ifg);
+       bitset_t *seen     = bitset_irg_malloc(birg->irg);
 
        ir_node *n;
 
-       be_ifg_foreach_node(cenv->ifg, nodes_it, n) {
-               if(!bitset_contains_irn(seen, n) && !arch_irn_is(cenv->birg->main_env->arch_env, n, ignore)) {
-                       ++n_comp;
-                       bitset_add_irn(seen, n);
-                       int_comp_rec(cenv, n, seen);
-               }
+       be_ifg_foreach_node(ifg, nodes_it, n) {
+               if (bitset_contains_irn(seen, n))
+                       continue;
+
+               if (arch_get_register_req_out(n)->type & arch_register_req_type_ignore)
+                       continue;
+
+               ++n_comp;
+               bitset_add_irn(seen, n);
+               int_comp_rec(ifg, n, seen);
        }
 
        free(seen);
        return n_comp;
 }
 
-void be_ifg_stat(const be_chordal_env_t *cenv, be_ifg_stat_t *stat)
+void be_ifg_stat(be_irg_t *birg, be_ifg_t *ifg, be_ifg_stat_t *stat)
 {
-       void *nodes_it  = be_ifg_nodes_iter_alloca(cenv->ifg);
-       void *neigh_it  = be_ifg_neighbours_iter_alloca(cenv->ifg);
-       bitset_t *nodes = bitset_irg_malloc(cenv->irg);
-
-       ir_node *n, *m;
+       void     *nodes_it = be_ifg_nodes_iter_alloca(ifg);
+       void     *neigh_it = be_ifg_neighbours_iter_alloca(ifg);
+       bitset_t *nodes    = bitset_irg_malloc(birg->irg);
+       ir_node  *n, *m;
 
        memset(stat, 0, sizeof(stat[0]));
-       be_ifg_foreach_node(cenv->ifg, nodes_it, n) {
+
+       be_ifg_foreach_node(ifg, nodes_it, n) {
                stat->n_nodes += 1;
-               be_ifg_foreach_neighbour(cenv->ifg, neigh_it, n, m) {
+               be_ifg_foreach_neighbour(ifg, neigh_it, n, m) {
                        bitset_add_irn(nodes, n);
                        stat->n_edges += !bitset_contains_irn(nodes, m);
                }
        }
 
-       stat->n_comps = int_component_stat(cenv);
+       stat->n_comps = int_component_stat(birg, ifg);
        bitset_free(nodes);
 }
+
+enum {
+       BE_IFG_STD = 1,
+       BE_IFG_FAST = 2,
+       BE_IFG_CLIQUE = 3,
+       BE_IFG_POINTER = 4,
+       BE_IFG_LIST = 5,
+       BE_IFG_CHECK = 6
+};
+
+static int ifg_flavor = BE_IFG_STD;
+
+static const lc_opt_enum_int_items_t ifg_flavor_items[] = {
+       { "std",     BE_IFG_STD     },
+       { "fast",    BE_IFG_FAST    },
+       { "clique",  BE_IFG_CLIQUE  },
+       { "pointer", BE_IFG_POINTER },
+       { "list",    BE_IFG_LIST    },
+       { "check",   BE_IFG_CHECK   },
+       { NULL,      0              }
+};
+
+static lc_opt_enum_int_var_t ifg_flavor_var = {
+       &ifg_flavor, ifg_flavor_items
+};
+
+static const lc_opt_table_entry_t be_ifg_options[] = {
+       LC_OPT_ENT_ENUM_PTR ("ifg", "interference graph flavour", &ifg_flavor_var),
+       LC_OPT_LAST
+};
+
+void be_init_ifg(void)
+{
+       lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
+       lc_opt_entry_t *ifg_grp = lc_opt_get_grp(be_grp, "ifg");
+
+       lc_opt_add_table(ifg_grp, be_ifg_options);
+}
+
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_ifg);
+
+static FILE *be_ifg_open(const be_chordal_env_t *env, const char *prefix)
+{
+       FILE *result;
+       char buf[1024];
+
+       ir_snprintf(buf, sizeof(buf), "%s%F_%s.log", prefix, env->irg, env->cls->name);
+       result = fopen(buf, "wt");
+       if (result == NULL) {
+               panic("Couldn't open '%s' for writing.", buf);
+       }
+
+       return result;
+}
+
+static void check_ifg_implementations(const be_chordal_env_t *chordal_env)
+{
+       be_ifg_t *ifg;
+       FILE *f;
+
+       f = be_ifg_open(chordal_env, "std");
+       ifg = be_ifg_std_new(chordal_env);
+       be_ifg_check_sorted_to_file(ifg, f);
+       fclose(f);
+       be_ifg_free(ifg);
+
+       f = be_ifg_open(chordal_env, "list");
+       ifg = be_ifg_list_new(chordal_env);
+       be_ifg_check_sorted_to_file(ifg, f);
+       fclose(f);
+       be_ifg_free(ifg);
+
+       f = be_ifg_open(chordal_env, "clique");
+       ifg = be_ifg_clique_new(chordal_env);
+       be_ifg_check_sorted_to_file(ifg, f);
+       fclose(f);
+       be_ifg_free(ifg);
+
+       f = be_ifg_open(chordal_env, "pointer");
+       ifg = be_ifg_pointer_new(chordal_env);
+       be_ifg_check_sorted_to_file(ifg, f);
+       fclose(f);
+       be_ifg_free(ifg);
+};
+
+be_ifg_t *be_create_ifg(const be_chordal_env_t *chordal_env)
+{
+       be_ifg_t *ifg = NULL;
+
+       switch (ifg_flavor) {
+               default:
+                       assert(0);
+                       fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
+               case BE_IFG_STD:
+               case BE_IFG_FAST:
+                       ifg = be_ifg_std_new(chordal_env);
+                       break;
+               case BE_IFG_CLIQUE:
+                       ifg = be_ifg_clique_new(chordal_env);
+                       break;
+               case BE_IFG_POINTER:
+                       ifg = be_ifg_pointer_new(chordal_env);
+                       break;
+               case BE_IFG_LIST:
+                       ifg = be_ifg_list_new(chordal_env);
+                       break;
+               case BE_IFG_CHECK:
+                       check_ifg_implementations(chordal_env);
+                       /* Build the interference graph. */
+                       ifg = be_ifg_std_new(chordal_env);
+                       break;
+       }
+
+       return ifg;
+}