2015-03-02  Robert Dewar  <dewar@adacore.com>

	* atree.ads, atree.adb (Uint24): New function
	(Set_Uint24): New procedure.
	* atree.h (Uint24): New macro for field access.
	* back_end.adb (Call_Back_End): For now, don't call back end
	if unnesting subprogs.
	* einfo.adb (Activation_Record_Component): New field
	(Subps_Index): New field.
	* einfo.ads (Activation_Record_Component): New field
	(Subps_Index): New field Minor reordering of comments into alpha order.
	* exp_unst.ads, exp_unst.adb: Continued development.

2015-03-02  Gary Dismukes  <dismukes@adacore.com>

	* exp_disp.ads: Minor reformatting.

2015-03-02  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch8.adb (Chain_Use_Clause): Do not chain use clause from
	ancestor to list of use clauses active in descendant unit if we
	are within the private part of an intervening parent, to prevent
	circularities in use clause list.

From-SVN: r221114