extern void df_scan_blocks (void);
extern df_ref df_ref_create (rtx, rtx *, rtx,basic_block,
enum df_ref_type, int ref_flags);
+extern void df_uses_create (rtx *, rtx, int);
extern void df_ref_remove (df_ref);
extern struct df_insn_info * df_insn_create_insn_record (rtx);
extern void df_insn_delete (basic_block, unsigned int);