2015-03-02  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_util.adb (Possible_Bit_Aligned_Component): Do not process
	an unanalyzed node.
	* sem_util.adb (Kill_Current_Values): Do not invalidate and
	de-null a constant.

From-SVN: r221107