+#include "benode.h"
+
+
+
+typedef struct pressure_walker_env_t pressure_walker_env_t;
+struct pressure_walker_env_t {
+ ir_graph *irg;
+ be_lv_t *lv;
+ double insn_count;
+ double regpressure;
+ size_t max_pressure;
+ const arch_register_class_t *cls;
+};
+
+static void check_reg_pressure_class(pressure_walker_env_t *env,
+ ir_node *block,
+ const arch_register_class_t *cls)
+{
+ ir_graph *irg = env->irg;
+ ir_node *irn;
+ ir_nodeset_t live_nodes;
+ size_t max_live;
+
+ ir_nodeset_init(&live_nodes);
+ be_liveness_end_of_block(env->lv, cls, block, &live_nodes);
+ max_live = ir_nodeset_size(&live_nodes);
+ env->regpressure += max_live;
+
+ sched_foreach_reverse(block, irn) {
+ size_t cnt;
+
+ if (is_Phi(irn))
+ break;
+
+ be_liveness_transfer(cls, irn, &live_nodes);
+ cnt = ir_nodeset_size(&live_nodes);
+ max_live = cnt < max_live ? max_live : cnt;
+ env->regpressure += cnt;
+ env->insn_count++;
+ }