flow.c (verify_local_live_at_start): Back out last change.

	* flow.c (verify_local_live_at_start): Back out last change.
	* combine.c (distribute_notes): When parts of a hard reg are
	neither set nor referenced in PLACE, search backwards for a
	place to put a REG_UNUSED note; if none found, ask for flow
	info refresh.

From-SVN: r37284