+typedef struct be_irg_t {
+ be_main_env_t *main_env;
+ be_lv_t *lv;
+ be_stack_layout_t stack_layout;
+ unsigned *allocatable_regs; /**< registers available for the
+ allocator */
+ arch_register_req_t *sp_req; /**< requirements for stackpointer producing
+ nodes. */
+ struct obstack obst; /**< birg obstack (mainly used to keep
+ register constraints which we can't keep
+ in the irg obst, because it gets replaced
+ during code selection) */
+ void *isa_link; /**< architecture specific per-graph data*/
+} be_irg_t;
+
+static inline be_irg_t *be_birg_from_irg(const ir_graph *irg)
+{
+ return (be_irg_t*) irg->be_data;
+}
+
+static inline be_main_env_t *be_get_irg_main_env(const ir_graph *irg)
+{
+ return be_birg_from_irg(irg)->main_env;
+}
+
+static inline be_lv_t *be_get_irg_liveness(const ir_graph *irg)
+{
+ return be_birg_from_irg(irg)->lv;
+}
+
+static inline const arch_env_t *be_get_irg_arch_env(const ir_graph *irg)
+{
+ return be_birg_from_irg(irg)->main_env->arch_env;
+}
+
+static inline struct obstack *be_get_be_obst(const ir_graph *irg)
+{
+ be_irg_t *const birg = be_birg_from_irg(irg);
+ struct obstack *const obst = &birg->obst;
+ assert(obstack_object_size(obst) == 0);
+ return obst;
+}
+
+static inline be_stack_layout_t *be_get_irg_stack_layout(const ir_graph *irg)
+{
+ return &be_birg_from_irg(irg)->stack_layout;
+}