+extern unsigned short asm_constraint_flags[256];
+
+void be_init_default_asm_constraint_flags(void);
+
+/**
+ * Put the registers to be ignored in this IRG into a bitset.
+ * @param birg The backend IRG data structure.
+ * @param cls The register class.
+ * @param bs The bitset (may be NULL).
+ * @return The number of registers to be ignored.
+ */
+unsigned be_put_ignore_regs(const be_irg_t *birg,
+ const arch_register_class_t *cls, bitset_t *bs);
+
+
+/**
+ * Initialize the backend. Must be run first in init_firm();
+ */
+void firm_be_init(void);
+void firm_be_finish(void);
+
+extern int be_timing;
+
+typedef enum {
+ T_ABI,
+ T_CODEGEN,
+ T_RA_PREPARATION,
+ T_SCHED,
+ T_CONSTR,
+ T_FINISH,
+ T_EMIT,
+ T_VERIFY,
+ T_OTHER,
+ T_HEIGHTS,
+ T_LIVE,
+ T_EXECFREQ,
+ T_SSA_CONSTR,
+ T_RA_PROLOG,
+ T_RA_EPILOG,
+ T_RA_CONSTR,
+ T_RA_SPILL,
+ T_RA_SPILL_APPLY,
+ T_RA_COLOR,
+ T_RA_IFG,
+ T_RA_COPYMIN,
+ T_RA_SSA,
+ T_RA_OTHER,
+ T_LAST = T_RA_OTHER
+} be_timer_id_t;
+extern ir_timer_t *be_timers[T_LAST+1];
+
+static inline void be_timer_push(be_timer_id_t id)
+{
+ int res;
+ if (!be_timing)
+ return;
+
+ assert(id <= T_LAST);
+ res = ir_timer_push(be_timers[id]);
+ (void) res;
+ assert(res && "Timer already on stack, cannot be pushed twice.");
+}
+
+static inline void be_timer_pop(be_timer_id_t id)
+{
+ ir_timer_t *tmp;
+ if (!be_timing)
+ return;
+
+ tmp = ir_timer_pop();
+ (void) tmp;
+ assert(tmp == be_timers[id] && "Attempt to pop wrong timer.");
+}
+
+#endif