extern bool bb_header_p (insn_t);
extern void sel_init_invalid_data_sets (insn_t);
extern bool insn_at_boundary_p (insn_t);
-extern bool jump_leads_only_to_bb_p (insn_t, basic_block);
/* Basic block and CFG functions. */
extern bool tidy_control_flow (basic_block, bool);
extern void free_bb_note_pool (void);
-extern void sel_remove_empty_bb (basic_block, bool, bool);
extern void purge_empty_blocks (void);
extern basic_block sel_split_edge (edge);
extern basic_block sel_create_recovery_block (insn_t);
-extern void sel_merge_blocks (basic_block, basic_block);
extern bool sel_redirect_edge_and_branch (edge, basic_block);
extern void sel_redirect_edge_and_branch_force (edge, basic_block);
extern void sel_init_pipelining (void);