perform statitics only if firmstats are active

ir/be/bestat.c

@@ -52,30 +52,38 @@ static void stat_reg_pressure_block(ir_node *block, void *env) {
 }
 
 void be_do_stat_reg_pressure(be_irg_t *birg) {
-	be_liveness(birg->irg);
-	/* Collect register pressure information for each block */
-	irg_block_walk_graph(birg->irg, stat_reg_pressure_block, NULL, birg);
+	if (stat_is_active()) {
+		be_liveness(birg->irg);
+		/* Collect register pressure information for each block */
+		irg_block_walk_graph(birg->irg, stat_reg_pressure_block, NULL, birg);
+	}
 }
 
 /**
  * Notify statistic module about amount of ready nodes.
  */
 void be_do_stat_sched_ready(ir_node *block, nodeset *ready_set) {
-	stat_be_block_sched_ready(get_irn_irg(block), block, nodeset_count(ready_set));
+	if (stat_is_active()) {
+		stat_be_block_sched_ready(get_irn_irg(block), block, nodeset_count(ready_set));
+	}
 }
 
 /**
  * Pass information about a perm to the statistic module.
  */
 void be_do_stat_perm(const char *class_name, int n_regs, ir_node *perm, ir_node *block, int n, int real_size) {
-	stat_be_block_stat_perm(class_name, n_regs, perm, block, n, real_size);
+	if (stat_is_active()) {
+		stat_be_block_stat_perm(class_name, n_regs, perm, block, n, real_size);
+	}
 }
 
 /**
  * Pass information about a cycle or chain in a perm to the statistic module.
  */
 void be_do_stat_permcycle(const char *class_name, ir_node *perm, ir_node *block, int is_chain, int n_elems, int n_ops) {
-	stat_be_block_stat_permcycle(class_name, perm, block, is_chain, n_elems, n_ops);
+	if (stat_is_active()) {
+		stat_be_block_stat_permcycle(class_name, perm, block, is_chain, n_elems, n_ops);
+	}
 }
 
 #else