sem_ch3.adb: The predicate Is_Descendent_Of_Address is now an entity flag, for effiency.

sem_ch3.adb: The predicate Is_Descendent_Of_Address is now an entity flag, for effiency.

2007-08-31  Ed Schonberg  <schonberg@adacore.com>

	* sem_ch3.adb: The predicate Is_Descendent_Of_Address is now an entity
	flag, for effiency. It is called when analyzing arithmetic operators
	and also for actuals in calls that are universal_integers. The flag is
	set for the predefined type address, and for any type or subtype
	derived from it.

	* sem_ch4.adb (Analyze_One_Call): Reject an actual that is a
	Universal_Integer, when the formal is a descendent of address and the
	call appears in user code.
	(Analyze_Selected_Component): if the prefix is a private extension, the
	tag component is visible.

	* sem_util.ads, sem_util.adb: Remove Is_Descendent_Of_Address, now an
	entity flag.

From-SVN: r127980