-extern ir_entity *arch_get_frame_entity(const arch_env_t *env, const ir_node *irn);
-extern void arch_set_frame_entity(const arch_env_t *env, ir_node *irn, ir_entity *ent);
-extern int arch_get_sp_bias(const arch_env_t *env, ir_node *irn);
-
-extern int arch_get_op_estimated_cost(const arch_env_t *env, const ir_node *irn);
-extern arch_inverse_t *arch_get_inverse(const arch_env_t *env, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack);
-extern int arch_possible_memory_operand(const arch_env_t *env, const ir_node *irn, unsigned int i);
-extern void arch_perform_memory_operand(const arch_env_t *env, ir_node *irn, ir_node *spill, unsigned int i);
+int arch_get_op_estimated_cost(const ir_node *irn);
+arch_inverse_t *arch_get_inverse(const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack);
+int arch_possible_memory_operand(const ir_node *irn, unsigned int i);
+void arch_perform_memory_operand(ir_node *irn, ir_node *spill, unsigned int i);