2016-04-20  Hristian Kirtchev  <kirtchev@adacore.com>

	* einfo.adb Flag286 is now used as Is_Exception_Handler.
	(Is_Exception_Handler): New routine.
	(Set_Is_Exception_Handler): New routine.
	(Write_Entity_Flags): Output the status of Is_Exception_Handler.
	* einfo.ads New attribute Is_Exception_Handler along with
	occurrences in entities.
	(Is_Exception_Handler): New routine along with pragma Inline.
	(Set_Is_Exception_Handler): New routine along with pragma Inline.
	* exp_ch7.adb (Make_Transient_Block): Ignore blocks generated
	for exception handlers with a choice parameter.
	* sem_ch11.adb (Analyze_Exception_Handlers): Mark the scope
	generated for a choice parameter as an exception handler.

2016-04-20  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch3.adb (Build_Derived_Access_Type): Remove dead code.
	(Constrain_Discriminated_Type): In an instance, if the type has
	unknown discriminants, use its full view.
	(Process_Subtype): Check that the base type is private before
	adding subtype to Private_Dependents list.

2016-04-20  Bob Duff  <duff@adacore.com>

	* sem_ch13.adb: Minor comment fix.

From-SVN: r235264