X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbechordal_main.c;h=39755ed7c4eb56a63726da8aede5e4111727c08b;hb=80a6158fdd766f42ee6c508a773bc114ff1b61f3;hp=639861fb4ee848a2b86ac8958030626f4d03cd47;hpb=2f6acfb47eb91336095d2373db11144a4011f1a2;p=libfirm

diff --git a/ir/be/bechordal_main.c b/ir/be/bechordal_main.c
index 639861fb4..39755ed7c 100644
--- a/ir/be/bechordal_main.c
+++ b/ir/be/bechordal_main.c
@@ -4,7 +4,7 @@
  * @author Sebastian Hack
  * @cvs-id $Id$
  *
- * Copyright (C) 2005 Universitaet Karlsruhe
+ * Copyright (C) 2005-2006 Universitaet Karlsruhe
  * Released under the GPL
  *
  * Driver for the chordal register allocator.
@@ -13,6 +13,8 @@
 #include "config.h"
 #endif
 
+#include <time.h>
+
 #include "obst.h"
 #include "pset.h"
 #include "list.h"
@@ -26,6 +28,7 @@
 #include <libcore/lc_timing.h>
 #endif /* WITH_LIBCORE */
 
+#include "ircons_t.h"
 #include "irmode_t.h"
 #include "irgraph_t.h"
 #include "irprintf_t.h"
@@ -46,16 +49,20 @@
 #include "bejavacoal.h"
 #include "beutil.h"
 #include "besched.h"
-#include "benumb_t.h"
 #include "besched_t.h"
 #include "belive_t.h"
 #include "bearch.h"
 #include "beifg_t.h"
 #include "beifg_impl.h"
 #include "benode_t.h"
+#include "bestatevent.h"
+#include "bestat.h"
+#include "bemodule.h"
 
 #include "bespillbelady.h"
 #include "bespillmorgan.h"
+#include "bespillslots.h"
+#include "bespilloptions.h"
 #include "belower.h"
 
 #ifdef WITH_ILP
@@ -67,60 +74,8 @@
 #include "becopyopt.h"
 #include "bessadestr.h"
 #include "beverify.h"
-#include "bespillslots.h"
-#include "bespillcost.h"
 #include "benode_t.h"
 
-void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
-	const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
-	struct obstack ob;
-	pmap_entry *pme;
-	ir_node **nodes, *n1, *n2;
-	int i, o;
-	DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
-
-	/* Collect all irns */
-	obstack_init(&ob);
-	pmap_foreach(chordal_env->border_heads, pme) {
-		border_t *curr;
-		struct list_head *head = pme->value;
-		list_for_each_entry(border_t, curr, head, list)
-			if (curr->is_def && curr->is_real)
-				if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
-					obstack_ptr_grow(&ob, curr->irn);
-	}
-	obstack_ptr_grow(&ob, NULL);
-	nodes = (ir_node **) obstack_finish(&ob);
-
-	/* Check them */
-	for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
-		const arch_register_t *n1_reg, *n2_reg;
-
-		n1_reg = arch_get_irn_register(arch_env, n1);
-		if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
-			DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
-			assert(0 && "Register constraint does not hold");
-		}
-		for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
-			n2_reg = arch_get_irn_register(arch_env, n2);
-			if (values_interfere(chordal_env->lv, n1, n2) && n1_reg == n2_reg) {
-				DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
-				assert(0 && "Interfering values have the same color!");
-			}
-		}
-	}
-	obstack_free(&ob, NULL);
-}
-
-int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
-{
-	if(env->ifg)
-		return be_ifg_connected(env->ifg, a, b);
-	else
-		return values_interfere(env->lv, a, b);
-}
-
-
 static be_ra_chordal_opts_t options = {
 	BE_CH_DUMP_NONE,
 	BE_CH_SPILL_BELADY,
@@ -129,6 +84,17 @@ static be_ra_chordal_opts_t options = {
 	BE_CH_VRFY_WARN,
 };
 
+/** Enable extreme live range splitting. */
+static int be_elr_split = 0;
+
+/** Assumed loop iteration count for execution frequency estimation. */
+static int be_loop_weight = 9;
+
+typedef struct _post_spill_env_t {
+	be_chordal_env_t cenv;
+	double           pre_spill_cost;
+} post_spill_env_t;
+
 static be_ra_timer_t ra_timer = {
 	NULL,
 	NULL,
@@ -140,12 +106,12 @@ static be_ra_timer_t ra_timer = {
 	NULL,
 	NULL,
 	NULL,
+	NULL,
 };
 
-#ifdef WITH_LIBCORE
 static const lc_opt_enum_int_items_t spill_items[] = {
-	{ "morgan", BE_CH_SPILL_MORGAN },
 	{ "belady", BE_CH_SPILL_BELADY },
+	{ "morgan", BE_CH_SPILL_MORGAN },
 #ifdef WITH_ILP
 	{ "remat",  BE_CH_SPILL_REMAT },
 #endif /* WITH_ILP */
@@ -173,16 +139,17 @@ static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 };
 
 static const lc_opt_enum_int_items_t dump_items[] = {
-	{ "spill",    BE_CH_DUMP_SPILL     },
-	{ "live",     BE_CH_DUMP_LIVE      },
-	{ "color",    BE_CH_DUMP_COLOR     },
-	{ "copymin",  BE_CH_DUMP_COPYMIN   },
-	{ "ssadestr", BE_CH_DUMP_SSADESTR  },
-	{ "tree",     BE_CH_DUMP_TREE_INTV },
-	{ "constr",   BE_CH_DUMP_CONSTR    },
-	{ "lower",    BE_CH_DUMP_LOWER     },
-	{ "appel",    BE_CH_DUMP_APPEL     },
-	{ "all",      BE_CH_DUMP_ALL       },
+	{ "spill",      BE_CH_DUMP_SPILL      },
+	{ "live",       BE_CH_DUMP_LIVE       },
+	{ "color",      BE_CH_DUMP_COLOR      },
+	{ "copymin",    BE_CH_DUMP_COPYMIN    },
+	{ "ssadestr",   BE_CH_DUMP_SSADESTR   },
+	{ "tree",       BE_CH_DUMP_TREE_INTV  },
+	{ "constr",     BE_CH_DUMP_CONSTR     },
+	{ "lower",      BE_CH_DUMP_LOWER      },
+	{ "spillslots", BE_CH_DUMP_SPILLSLOTS },
+	{ "appel",      BE_CH_DUMP_APPEL      },
+	{ "all",        BE_CH_DUMP_ALL        },
 	{ NULL, 0 }
 };
 
@@ -213,39 +180,66 @@ static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 	&options.vrfy_option, be_ch_vrfy_items
 };
 
-/** Enable extreme live range splitting. */
-static int be_elr_split = 0;
-
-/** Assumed loop iteration count for execution frequency estimation. */
-static int be_loop_weight = 9;
-
 static const lc_opt_table_entry_t be_chordal_options[] = {
-	LC_OPT_ENT_ENUM_INT ("spill",	      "spill method (belady, morgan or remat)", &spill_var),
-	LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour (std, fast, clique, pointer, list, check)", &ifg_flavor_var),
-	LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options (copy or swap)", &lower_perm_var),
+	LC_OPT_ENT_ENUM_INT ("spill",	      "spill method", &spill_var),
+	LC_OPT_ENT_ENUM_PTR ("ifg",           "interference graph flavour", &ifg_flavor_var),
+	LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 	LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
-	LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options (off, warn, assert)", &be_ch_vrfy_var),
+	LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 	LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 	LC_OPT_ENT_INT      ("loop_weight",   "assumed amount of loop iterations for guessing the execution frequency", &be_loop_weight),
 	{ NULL }
 };
 
-static void be_ra_chordal_register_options(lc_opt_entry_t *grp)
-{
-	static int run_once = 0;
-	lc_opt_entry_t *chordal_grp;
+void be_ra_chordal_check(be_chordal_env_t *chordal_env) {
+	const arch_env_t *arch_env = chordal_env->birg->main_env->arch_env;
+	struct obstack ob;
+	pmap_entry *pme;
+	ir_node **nodes, *n1, *n2;
+	int i, o;
+	be_lv_t *lv = chordal_env->birg->lv;
+	DEBUG_ONLY(firm_dbg_module_t *dbg = chordal_env->dbg;)
 
-	if (! run_once) {
-		run_once    = 1;
-		chordal_grp = lc_opt_get_grp(grp, "chordal");
+	/* Collect all irns */
+	obstack_init(&ob);
+	pmap_foreach(chordal_env->border_heads, pme) {
+		border_t *curr;
+		struct list_head *head = pme->value;
+		list_for_each_entry(border_t, curr, head, list)
+			if (curr->is_def && curr->is_real)
+				if (arch_get_irn_reg_class(arch_env, curr->irn, -1) == chordal_env->cls)
+					obstack_ptr_grow(&ob, curr->irn);
+	}
+	obstack_ptr_grow(&ob, NULL);
+	nodes = (ir_node **) obstack_finish(&ob);
+
+	/* Check them */
+	for (i = 0, n1 = nodes[i]; n1; n1 = nodes[++i]) {
+		const arch_register_t *n1_reg, *n2_reg;
 
-		lc_opt_add_table(chordal_grp, be_chordal_options);
+		n1_reg = arch_get_irn_register(arch_env, n1);
+		if (!arch_reg_is_allocatable(arch_env, n1, -1, n1_reg)) {
+			DBG((dbg, 0, "Register %s assigned to %+F is not allowed\n", n1_reg->name, n1));
+			assert(0 && "Register constraint does not hold");
+		}
+		for (o = i+1, n2 = nodes[o]; n2; n2 = nodes[++o]) {
+			n2_reg = arch_get_irn_register(arch_env, n2);
+			if (values_interfere(lv, n1, n2) && n1_reg == n2_reg) {
+				DBG((dbg, 0, "Values %+F and %+F interfere and have the same register assigned: %s\n", n1, n2, n1_reg->name));
+				assert(0 && "Interfering values have the same color!");
+			}
+		}
 	}
+	obstack_free(&ob, NULL);
+}
 
-	co_register_options(chordal_grp);
-	be_java_coal_register_options(chordal_grp);
+int nodes_interfere(const be_chordal_env_t *env, const ir_node *a, const ir_node *b)
+{
+	if(env->ifg)
+		return be_ifg_connected(env->ifg, a, b);
+	else
+		return values_interfere(env->birg->lv, a, b);
 }
-#endif /* WITH_LIBCORE */
 
 static void dump(unsigned mask, ir_graph *irg,
 				 const arch_register_class_t *cls,
@@ -321,30 +315,34 @@ static void memory_operand_walker(ir_node *irn, void *env) {
 	const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 	const ir_edge_t  *edge, *ne;
 	ir_node          *block;
+	ir_node          *spill;
 
 	if (! be_is_Reload(irn))
 		return;
 
+	/* only use memory operands, if the reload is only used by 1 node */
+	if(get_irn_n_edges(irn) > 1)
+		return;
+
+	spill = be_get_Reload_mem(irn);
 	block = get_nodes_block(irn);
 
 	foreach_out_edge_safe(irn, edge, ne) {
 		ir_node *src = get_edge_src_irn(edge);
 		int     pos  = get_edge_src_pos(edge);
 
-		if (! src)
-			continue;
+		assert(src && "outedges broken!");
 
 		if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 			DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
-			arch_perform_memory_operand(aenv, src, irn, pos);
+			arch_perform_memory_operand(aenv, src, spill, pos);
 		}
 	}
 
 	/* kill the Reload */
 	if (get_irn_n_edges(irn) == 0) {
 		sched_remove(irn);
-		set_irn_n(irn, 0, new_Bad());
-		set_irn_n(irn, 1, new_Bad());
+		set_irn_n(irn, be_pos_Reload_mem, new_Bad());
 	}
 }
 
@@ -356,38 +354,121 @@ static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 }
 
 /**
- * Performs chordal register allocation for each register class on given irg.
- *
- * @param bi  Backend irg object
- * @return Structure containing timer for the single phases or NULL if no timing requested.
+ * Sorry for doing stats again...
  */
-static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
+typedef struct _node_stat_t {
+	unsigned int n_phis;      /**< Phis of the current register class. */
+	unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
+	unsigned int n_copies;    /**< Copies */
+	unsigned int n_perms;     /**< Perms */
+	unsigned int n_spills;    /**< Spill nodes */
+	unsigned int n_reloads;   /**< Reloads */
+} node_stat_t;
+
+struct node_stat_walker {
+	node_stat_t *stat;
+	const be_chordal_env_t *cenv;
+	bitset_t *mem_phis;
+};
+
+static void node_stat_walker(ir_node *irn, void *data)
 {
-	const be_main_env_t *main_env  = bi->main_env;
-	const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
-	ir_graph            *irg       = bi->irg;
-	be_options_t        *main_opts = main_env->options;
-	int                  splitted  = 0;
+	struct node_stat_walker *env = data;
+	const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 
-	int j, m;
-	be_chordal_env_t chordal_env;
+	if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 
+		/* if the node is a normal phi */
+		if(is_Phi(irn))
+			env->stat->n_phis++;
+
+		else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
+			++env->stat->n_spills;
+
+		else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
+			++env->stat->n_reloads;
+
+		else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
+			++env->stat->n_copies;
+
+		else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
+			++env->stat->n_perms;
+	}
+
+	/* a mem phi is a PhiM with a mem phi operand or a Spill operand */
+	else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
+		int i;
+
+		for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
+			ir_node *op = get_irn_n(irn, i);
+
+			if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
+				bitset_add_irn(env->mem_phis, irn);
+				env->stat->n_mem_phis++;
+				break;
+			}
+		}
+	}
+}
+
+static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
+{
+	struct node_stat_walker env;
+
+	memset(stat, 0, sizeof(stat[0]));
+	env.cenv     = cenv;
+	env.mem_phis = bitset_irg_malloc(cenv->irg);
+	env.stat     = stat;
+	irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
+	bitset_free(env.mem_phis);
+}
+
+static void insn_count_walker(ir_node *irn, void *data)
+{
+	int *cnt = data;
+
+	switch(get_irn_opcode(irn)) {
+	case iro_Proj:
+	case iro_Phi:
+	case iro_Start:
+	case iro_End:
+		break;
+	default:
+		(*cnt)++;
+	}
+}
+
+static unsigned int count_insns(ir_graph *irg)
+{
+	int cnt = 0;
+	irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
+	return cnt;
+}
+
+#ifdef WITH_LIBCORE
+/**
+ * Initialize all timers.
+ */
+static void be_init_timer(be_options_t *main_opts)
+{
 	if (main_opts->timing == BE_TIME_ON) {
-		ra_timer.t_prolog  = lc_timer_register("ra_prolog",   "regalloc prolog");
-		ra_timer.t_epilog  = lc_timer_register("ra_epilog",   "regalloc epilog");
-		ra_timer.t_live    = lc_timer_register("ra_liveness", "be liveness");
-		ra_timer.t_spill   = lc_timer_register("ra_spill",    "spiller");
-		ra_timer.t_color   = lc_timer_register("ra_color",    "graph coloring");
-		ra_timer.t_ifg     = lc_timer_register("ra_ifg",      "interference graph");
-		ra_timer.t_copymin = lc_timer_register("ra_copymin",  "copy minimization");
-		ra_timer.t_ssa     = lc_timer_register("ra_ssadestr", "ssa destruction");
-		ra_timer.t_verify  = lc_timer_register("ra_verify",   "graph verification");
-		ra_timer.t_other   = lc_timer_register("ra_other",    "other time");
+		ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
+		ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
+		ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
+		ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
+		ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
+		ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
+		ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
+		ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
+		ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
+		ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
+		ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
+		LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
@@ -395,15 +476,19 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 		LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 	}
+}
 
-#define BE_TIMER_PUSH(timer)                                                        \
-	if (main_opts->timing == BE_TIME_ON) {                                          \
-		int res = lc_timer_push(timer);                                             \
-		if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
-			assert(res && "Timer already on stack, cannot be pushed twice.");       \
-		else if (options.vrfy_option == BE_CH_VRFY_WARN && ! res)                   \
-			fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
-				lc_timer_get_name(timer));                                          \
+#define BE_TIMER_INIT(main_opts)	be_init_timer(main_opts)
+
+#define BE_TIMER_PUSH(timer)                                                            \
+	if (main_opts->timing == BE_TIME_ON) {                                              \
+		if (! lc_timer_push(timer)) {                                                   \
+			if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
+				assert(!"Timer already on stack, cannot be pushed twice.");             \
+			else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
+				fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
+					lc_timer_get_name(timer));                                          \
+		}                                                                               \
 	}
 #define BE_TIMER_POP(timer)                                                                    \
 	if (main_opts->timing == BE_TIME_ON) {                                                     \
@@ -415,194 +500,319 @@ static be_ra_timer_t *be_ra_chordal_main(const be_irg_t *bi)
 				lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 		timer = tmp;                                                                           \
 	}
+#else
 
-	BE_TIMER_PUSH(ra_timer.t_other);
-	BE_TIMER_PUSH(ra_timer.t_prolog);
+#define BE_TIMER_INIT(main_opts)
+#define BE_TIMER_PUSH(timer)
+#define BE_TIMER_POP(timer)
 
-	compute_doms(irg);
+#endif /* WITH_LIBCORE */
 
-	chordal_env.opts      = &options;
-	chordal_env.irg       = irg;
-	chordal_env.birg      = bi;
-	chordal_env.dom_front = be_compute_dominance_frontiers(irg);
-	chordal_env.exec_freq = compute_execfreq(irg, be_loop_weight);
-	chordal_env.lv        = be_liveness(irg);
-	FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
+/**
+ * Perform things which need to be done per register class before spilling.
+ */
+static void pre_spill(const arch_isa_t *isa, int cls_idx, post_spill_env_t *pse) {
+	be_chordal_env_t *chordal_env = &pse->cenv;
+	node_stat_t      node_stat;
+
+	chordal_env->cls           = arch_isa_get_reg_class(isa, cls_idx);
+	chordal_env->border_heads  = pmap_create();
+	chordal_env->ignore_colors = bitset_malloc(chordal_env->cls->n_regs);
+
+#ifdef FIRM_STATISTICS
+	if (be_stat_ev_is_active()) {
+		be_stat_tags[STAT_TAG_CLS] = chordal_env->cls->name;
+		be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
+
+		/* perform some node statistics. */
+		node_stats(chordal_env, &node_stat);
+		be_stat_ev("phis_before_spill", node_stat.n_phis);
+	}
+#endif /* FIRM_STATISTICS */
 
-	obstack_init(&chordal_env.obst);
+	/* put all ignore registers into the ignore register set. */
+	put_ignore_colors(chordal_env);
 
-	BE_TIMER_POP(ra_timer.t_prolog);
+	be_pre_spill_prepare_constr(chordal_env);
+	dump(BE_CH_DUMP_CONSTR, chordal_env->irg, chordal_env->cls, "-constr-pre", dump_ir_block_graph_sched);
+
+#ifdef FIRM_STATISTICS
+	if (be_stat_ev_is_active()) {
+		pse->pre_spill_cost = be_estimate_irg_costs(chordal_env->irg,
+			chordal_env->birg->main_env->arch_env, chordal_env->birg->exec_freq);
+	}
+#endif /* FIRM_STATISTICS */
+}
+
+/**
+ * Perform things which need to be done per register class after spilling.
+ */
+static void post_spill(post_spill_env_t *pse) {
+	be_chordal_env_t    *chordal_env = &pse->cenv;
+	ir_graph            *irg         = chordal_env->irg;
+	be_irg_t            *birg        = chordal_env->birg;
+	const be_main_env_t *main_env    = birg->main_env;
+	be_options_t        *main_opts   = main_env->options;
+	static int          splitted     = 0;
+	node_stat_t         node_stat;
+
+#ifdef FIRM_STATISTICS
+	if (be_stat_ev_is_active()) {
+		double spillcosts = be_estimate_irg_costs(irg, main_env->arch_env, birg->exec_freq) - pse->pre_spill_cost;
+
+		be_stat_ev_l("spillcosts", (long) spillcosts);
+
+		node_stats(chordal_env, &node_stat);
+		be_stat_ev("phis_after_spill", node_stat.n_phis);
+		be_stat_ev("mem_phis", node_stat.n_mem_phis);
+		be_stat_ev("reloads", node_stat.n_reloads);
+		be_stat_ev("spills", node_stat.n_spills);
+	}
+#endif /* FIRM_STATISTICS */
 
-	/* Perform the following for each register class. */
-	for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
-		//FILE *f;
-		copy_opt_t *co = NULL;
+	check_for_memory_operands(chordal_env);
 
-		chordal_env.cls           = arch_isa_get_reg_class(isa, j);
-		chordal_env.border_heads  = pmap_create();
-		chordal_env.ignore_colors = bitset_malloc(chordal_env.cls->n_regs);
+	be_abi_fix_stack_nodes(birg->abi, birg->lv);
 
-		/* put all ignore registers into the ignore register set. */
-		put_ignore_colors(&chordal_env);
+	BE_TIMER_PUSH(ra_timer.t_verify);
+
+	/* verify schedule and register pressure */
+	if (chordal_env->opts->vrfy_option == BE_CH_VRFY_WARN) {
+		be_verify_schedule(irg);
+		be_verify_register_pressure(chordal_env->birg, chordal_env->cls, irg);
+	}
+	else if (chordal_env->opts->vrfy_option == BE_CH_VRFY_ASSERT) {
+		assert(be_verify_schedule(irg) && "Schedule verification failed");
+		assert(be_verify_register_pressure(chordal_env->birg, chordal_env->cls, irg)
+			&& "Register pressure verification failed");
+	}
+	BE_TIMER_POP(ra_timer.t_verify);
 
-		BE_TIMER_PUSH(ra_timer.t_live);
-		be_liveness_recompute(chordal_env.lv);
-		BE_TIMER_POP(ra_timer.t_live);
-		dump(BE_CH_DUMP_LIVE, irg, chordal_env.cls, "-live", dump_ir_block_graph_sched);
+	if (be_elr_split && ! splitted) {
+		extreme_liverange_splitting(chordal_env);
+		splitted = 1;
+	}
 
-		be_pre_spill_prepare_constr(&chordal_env);
-		dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-constr-pre", dump_ir_block_graph_sched);
+	/* Color the graph. */
+	BE_TIMER_PUSH(ra_timer.t_color);
+	be_ra_chordal_color(chordal_env);
+	BE_TIMER_POP(ra_timer.t_color);
 
-		BE_TIMER_PUSH(ra_timer.t_spill);
+	dump(BE_CH_DUMP_CONSTR, irg, chordal_env->cls, "-color", dump_ir_block_graph_sched);
 
-		/* spilling */
-		switch(options.spill_method) {
-		case BE_CH_SPILL_MORGAN:
-			be_spill_morgan(&chordal_env);
+	/* Create the ifg with the selected flavor */
+	BE_TIMER_PUSH(ra_timer.t_ifg);
+	switch (chordal_env->opts->ifg_flavor) {
+		default:
+			fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
+		case BE_CH_IFG_STD:
+		case BE_CH_IFG_FAST:
+			chordal_env->ifg = be_ifg_std_new(chordal_env);
 			break;
-		case BE_CH_SPILL_BELADY:
-			be_spill_belady(&chordal_env);
+		case BE_CH_IFG_CLIQUE:
+			chordal_env->ifg = be_ifg_clique_new(chordal_env);
 			break;
-#ifdef WITH_ILP
-		case BE_CH_SPILL_REMAT:
-			be_spill_remat(&chordal_env);
+		case BE_CH_IFG_POINTER:
+			chordal_env->ifg = be_ifg_pointer_new(chordal_env);
 			break;
-#endif /* WITH_ILP */
-		default:
-			fprintf(stderr, "no valid spiller selected. falling back to belady\n");
-			be_spill_belady(&chordal_env);
-		}
+		case BE_CH_IFG_LIST:
+			chordal_env->ifg = be_ifg_list_new(chordal_env);
+			break;
+		case BE_CH_IFG_CHECK:
+			check_ifg_implementations(chordal_env);
+			/* Build the interference graph. */
+			chordal_env->ifg = be_ifg_std_new(chordal_env);
+			break;
+	}
+	BE_TIMER_POP(ra_timer.t_ifg);
+
+#ifdef FIRM_STATISTICS
+	if (be_stat_ev_is_active()) {
+		be_ifg_stat_t stat;
+		be_ifg_stat(chordal_env, &stat);
+		be_stat_ev("ifg_nodes", stat.n_nodes);
+		be_stat_ev("ifg_edges", stat.n_edges);
+		be_stat_ev("ifg_comps", stat.n_comps);
+
+		node_stats(chordal_env, &node_stat);
+		be_stat_ev("perms_before_coal", node_stat.n_perms);
+		be_stat_ev("copies_before_coal", node_stat.n_copies);
+	}
+#endif /* FIRM_STATISTICS */
 
-		BE_TIMER_POP(ra_timer.t_spill);
+	/* copy minimization */
+	BE_TIMER_PUSH(ra_timer.t_copymin);
+	co_driver(chordal_env);
+	BE_TIMER_POP(ra_timer.t_copymin);
 
-		DBG((chordal_env.dbg, LEVEL_1, "spill costs for %+F in regclass %s: %g\n",
-		      irg,
-		      chordal_env.cls->name,
-		      get_irg_spill_cost(&chordal_env))
-		    );
+	dump(BE_CH_DUMP_COPYMIN, irg, chordal_env->cls, "-copymin", dump_ir_block_graph_sched);
 
-		dump(BE_CH_DUMP_SPILL, irg, chordal_env.cls, "-spill", dump_ir_block_graph_sched);
-		be_compute_spill_offsets(&chordal_env);
-		//be_coalesce_spillslots(&chordal_env);
-		check_for_memory_operands(&chordal_env);
-		be_abi_fix_stack_nodes(bi->abi, chordal_env.lv);
+	BE_TIMER_PUSH(ra_timer.t_ssa);
 
-		BE_TIMER_PUSH(ra_timer.t_verify);
+	/* ssa destruction */
+	be_ssa_destruction(chordal_env);
 
-		/* verify schedule and register pressure */
-		if (options.vrfy_option == BE_CH_VRFY_WARN) {
-			be_verify_schedule(irg);
-			be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg);
-		}
-		else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
-			assert(be_verify_schedule(irg) && "Schedule verification failed");
-			assert(be_verify_register_pressure(chordal_env.birg->main_env->arch_env, chordal_env.cls, irg)
-				&& "Register pressure verification failed");
-		}
-		BE_TIMER_POP(ra_timer.t_verify);
+	BE_TIMER_POP(ra_timer.t_ssa);
 
-		if (be_elr_split && ! splitted) {
-			extreme_liverange_splitting(&chordal_env);
-			splitted = 1;
-		}
+	dump(BE_CH_DUMP_SSADESTR, irg, chordal_env->cls, "-ssadestr", dump_ir_block_graph_sched);
+
+	BE_TIMER_PUSH(ra_timer.t_verify);
+	if (chordal_env->opts->vrfy_option != BE_CH_VRFY_OFF) {
+		be_ssa_destruction_check(chordal_env);
+	}
+	BE_TIMER_POP(ra_timer.t_verify);
+
+	be_ifg_free(chordal_env->ifg);
+	pmap_destroy(chordal_env->border_heads);
+	bitset_free(chordal_env->ignore_colors);
+
+#ifdef FIRM_STATISTICS
+	if (be_stat_ev_is_active()) {
+		node_stats(chordal_env, &node_stat);
+		be_stat_ev("perms_after_coal", node_stat.n_perms);
+		be_stat_ev("copies_after_coal", node_stat.n_copies);
+		be_stat_ev_pop();
+	}
+#endif /* FIRM_STATISTICS */
+}
+
+/**
+ * Performs chordal register allocation for each register class on given irg.
+ *
+ * @param birg  Backend irg object
+ * @return Structure containing timer for the single phases or NULL if no timing requested.
+ */
+static void be_ra_chordal_main(be_irg_t *birg)
+{
+	const be_main_env_t *main_env  = birg->main_env;
+	const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
+	ir_graph            *irg       = birg->irg;
+	be_options_t        *main_opts = main_env->options;
+	int                 j, m;
+	be_chordal_env_t    chordal_env;
 
+	BE_TIMER_INIT(main_opts);
+	BE_TIMER_PUSH(ra_timer.t_other);
+	BE_TIMER_PUSH(ra_timer.t_prolog);
 
-		/* Color the graph. */
-		BE_TIMER_PUSH(ra_timer.t_color);
-		be_ra_chordal_color(&chordal_env);
-		BE_TIMER_POP(ra_timer.t_color);
+	be_assure_dom_front(birg);
+	be_assure_liveness(birg);
 
-		dump(BE_CH_DUMP_CONSTR, irg, chordal_env.cls, "-color", dump_ir_block_graph_sched);
+	chordal_env.opts      = &options;
+	chordal_env.irg       = irg;
+	chordal_env.birg      = birg;
+	FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 
-		/* Create the ifg with the selected flavor */
-		BE_TIMER_PUSH(ra_timer.t_ifg);
-		switch (options.ifg_flavor) {
-			default:
-				fprintf(stderr, "no valid ifg flavour selected. falling back to std\n");
-			case BE_CH_IFG_STD:
-			case BE_CH_IFG_FAST:
-				chordal_env.ifg = be_ifg_std_new(&chordal_env);
-				break;
-			case BE_CH_IFG_CLIQUE:
-				chordal_env.ifg = be_ifg_clique_new(&chordal_env);
-				break;
-			case BE_CH_IFG_POINTER:
-				chordal_env.ifg = be_ifg_pointer_new(&chordal_env);
+	obstack_init(&chordal_env.obst);
+
+	BE_TIMER_POP(ra_timer.t_prolog);
+
+	be_stat_ev("insns_before", count_insns(irg));
+
+	if (! arch_code_generator_has_spiller(birg->cg)) {
+		/* use one of the generic spiller */
+
+		/* Perform the following for each register class. */
+		for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
+			post_spill_env_t pse;
+
+			memcpy(&pse.cenv, &chordal_env, sizeof(chordal_env));
+			pre_spill(isa, j, &pse);
+
+			BE_TIMER_PUSH(ra_timer.t_spill);
+			/* spilling */
+			switch(options.spill_method) {
+			case BE_CH_SPILL_MORGAN:
+				be_spill_morgan(&pse.cenv);
 				break;
-			case BE_CH_IFG_LIST:
-				chordal_env.ifg = be_ifg_list_new(&chordal_env);
+			case BE_CH_SPILL_BELADY:
+				be_spill_belady(&pse.cenv);
 				break;
-			case BE_CH_IFG_CHECK:
-				check_ifg_implementations(&chordal_env);
-				/* Build the interference graph. */
-				chordal_env.ifg = be_ifg_std_new(&chordal_env);
+	#ifdef WITH_ILP
+			case BE_CH_SPILL_REMAT:
+				be_spill_remat(&pse.cenv);
 				break;
-		}
-		BE_TIMER_POP(ra_timer.t_ifg);
+	#endif /* WITH_ILP */
+			default:
+				fprintf(stderr, "no valid spiller selected. falling back to belady\n");
+				be_spill_belady(&pse.cenv);
+			}
+			BE_TIMER_POP(ra_timer.t_spill);
 
-		BE_TIMER_PUSH(ra_timer.t_verify);
-		if (options.vrfy_option != BE_CH_VRFY_OFF)
-			be_ra_chordal_check(&chordal_env);
+			dump(BE_CH_DUMP_SPILL, irg, pse.cenv.cls, "-spill", dump_ir_block_graph_sched);
 
-		BE_TIMER_POP(ra_timer.t_verify);
+			post_spill(&pse);
+		}
+	}
+	else {
+		post_spill_env_t *pse;
 
-		/* copy minimization */
-		BE_TIMER_PUSH(ra_timer.t_copymin);
-		co_driver(&chordal_env);
-		BE_TIMER_POP(ra_timer.t_copymin);
-		dump(BE_CH_DUMP_COPYMIN, irg, chordal_env.cls, "-copymin", dump_ir_block_graph_sched);
+		/* the backend has it's own spiller */
+		m = arch_isa_get_n_reg_class(isa);
 
-		BE_TIMER_PUSH(ra_timer.t_verify);
+		pse = alloca(m * sizeof(pse[0]));
 
-		if (options.vrfy_option != BE_CH_VRFY_OFF)
-			be_ra_chordal_check(&chordal_env);
+		for (j = 0; j < m; ++j) {
+			memcpy(&pse[j].cenv, &chordal_env, sizeof(chordal_env));
+			pre_spill(isa, j, &pse[j]);
+		}
 
-		BE_TIMER_POP(ra_timer.t_verify);
-		BE_TIMER_PUSH(ra_timer.t_ssa);
+		BE_TIMER_PUSH(ra_timer.t_spill);
+		arch_code_generator_spill(birg->cg, &chordal_env);
+		BE_TIMER_POP(ra_timer.t_spill);
+		dump(BE_CH_DUMP_SPILL, irg, NULL, "-spill", dump_ir_block_graph_sched);
 
-		/* ssa destruction */
-		be_ssa_destruction(&chordal_env);
+		for (j = 0; j < m; ++j) {
+			post_spill(&pse[j]);
+		}
+	}
 
-		BE_TIMER_POP(ra_timer.t_ssa);
+	BE_TIMER_PUSH(ra_timer.t_spillslots);
 
-		dump(BE_CH_DUMP_SSADESTR, irg, chordal_env.cls, "-ssadestr", dump_ir_block_graph_sched);
+	be_coalesce_spillslots(&chordal_env);
+	dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 
-		BE_TIMER_PUSH(ra_timer.t_verify);
-		if (options.vrfy_option != BE_CH_VRFY_OFF) {
-			be_ssa_destruction_check(&chordal_env);
-			be_ra_chordal_check(&chordal_env);
-		}
-		BE_TIMER_POP(ra_timer.t_verify);
+	BE_TIMER_POP(ra_timer.t_spillslots);
 
-		be_ifg_free(chordal_env.ifg);
-		pmap_destroy(chordal_env.border_heads);
-		bitset_free(chordal_env.ignore_colors);
+	BE_TIMER_PUSH(ra_timer.t_verify);
+	/* verify spillslots */
+	if (options.vrfy_option == BE_CH_VRFY_WARN) {
+		be_verify_spillslots(main_env->arch_env, irg);
 	}
+	else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
+		assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
+	}
+	BE_TIMER_POP(ra_timer.t_verify);
 
 	BE_TIMER_PUSH(ra_timer.t_epilog);
-
 	dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 
 	lower_nodes_after_ra(&chordal_env, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 	dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 
 	obstack_free(&chordal_env.obst, NULL);
-	be_free_dominance_frontiers(chordal_env.dom_front);
-	be_liveness_free(chordal_env.lv);
-	free_execfreq(chordal_env.exec_freq);
-
 	BE_TIMER_POP(ra_timer.t_epilog);
+
 	BE_TIMER_POP(ra_timer.t_other);
 
-#undef BE_TIMER_PUSH
-#undef BE_TIMER_POP
+	be_stat_ev("insns_after", count_insns(irg));
 
-	return main_opts->timing == BE_TIME_ON ? &ra_timer : NULL;
+	return;
 }
 
-const be_ra_t be_ra_chordal_allocator = {
-#ifdef WITH_LIBCORE
-	be_ra_chordal_register_options,
-#endif
-	be_ra_chordal_main
+static be_ra_t be_ra_chordal_allocator = {
+	be_ra_chordal_main,
 };
+
+void be_init_chordal(void)
+{
+	lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
+	lc_opt_entry_t *ra_grp = lc_opt_get_grp(be_grp, "ra");
+	lc_opt_entry_t *chordal_grp = lc_opt_get_grp(ra_grp, "chordal");
+
+	lc_opt_add_table(chordal_grp, be_chordal_options);
+
+	be_register_allocator("chordal", &be_ra_chordal_allocator);
+}
+
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_chordal);