* emit-rtl.c (set_used_flags): New.
	(verify_rtx_sharing, verify_rtl_sharing): New.
	(unshare_all_rtl_1): Rename to....
	(unshare_all_rtl_in_chain): ... this one; make static.
	(copy_rtx_if_shared): LABEL_REF chan be shared.
	* ifcvt.c (unshare_ifcvt_sequence): New.
	(noce_try_move, noce_try_store_flag, noce_try_store_flag_constants,
	noce_try_addcc, noce_try_addcc, noce_try_store_flag_mask,
	noce_try_cmove, noce_try_store_flag_mask, noce_try_minmax,
	noce_try_abs, noce_process_if_block, find_cond_trap
	* rtl.h (verify_rtl_sharing, set_used_flags, unshare_all_rtl_in_chain):
	Declare.

From-SVN: r74030