2016-04-21  Philippe Gil  <gil@adacore.com>

	* tracebak.c (__gnat_backtrace): handle bad RIP values (win64 only)

2016-04-21  Javier Miranda  <miranda@adacore.com>

	* exp_aggr.adb (Component_Not_OK_For_Backend): Return true for string
	literals.

2016-04-21  Hristian Kirtchev  <kirtchev@adacore.com>

	* einfo.adb (Has_Non_Null_Abstract_State): New routine.
	* einfo.ads New synthesized attribute
	Has_Non_Null_Abstract_State along with occurrences in entities.
	(Has_Non_Null_Abstract_State): New routine.
	* sem_ch7.adb (Unit_Requires_Body): Add local variable
	Requires_Body. A package declaring an abstract state requires
	a body only when the state is non-null and the package contains
	at least one other construct that requires completion in a body.
	* sem_util.adb (Mode_Is_Off): Removed.
	(Requires_State_Refinement): Remove an obsolete check. Code
	cleanup.

2016-04-21  Bob Duff  <duff@adacore.com>

	* sem_attr.adb (Analyze_Attribute): In processing
	the 'Old attribute, a warning is given for infinite recursion. Fix
	the code to not crash when the prefix of 'Old denotes a protected
	function.
	* sem_ch5.adb (Analyze_Iterator_Specification):
	Avoid calling Is_Dependent_Component_Of_Mutable_Object in cases
	where the parameter would not be an object.

2016-04-21  Eric Botcazou  <ebotcazou@adacore.com>

	* sem_eval.adb (Compile_Time_Compare): Be prepared for an empty
	Etype or Underlying_Type of the operands.

2016-04-21  Eric Botcazou  <ebotcazou@adacore.com>

	* atree.adb (Print_Statistics): Protect against overflows and
	print the memory consumption in bytes.
	* table.adb (Reallocate): Do the intermediate calculation of the new
	size using the Memory.size_t type.

From-SVN: r235312