(fill_slots_from_thread): Update THREAD if it is split.

From-SVN: r8337

gcc/reorg.c

@@ -3297,6 +3297,8 @@ fill_slots_from_thread (insn, condition, thread, opposite_thread, likely,
 	      trial = try_split (pat, trial, 0);
 	      if (new_thread == old_trial)
 		new_thread = trial;
+	      if (thread == old_trial)
+		thread = trial;
 	      pat = PATTERN (trial);
 	      if (eligible_for_delay (insn, *pslots_filled, trial, flags))
 		goto winner;