2015-11-18  Nicolas Roche  <roche@adacore.com>

	* sysdep.c (__gnat_localtime_tzoff): On Windows platform
	GetTimeZoneInformation function is thread-safe. Thus there
	is no need to lock the runtime in the implementation of
	__gnat_localtime_tzoff on that platform.

2015-11-18  Eric Botcazou  <ebotcazou@adacore.com>

	* s-arit64.adb (To_Neg_Int): Add a special case for 2**63 input.

2015-11-18  Hristian Kirtchev  <kirtchev@adacore.com>

	* contracts.adb (Analyze_Contracts): New routine.
	(Analyze_Enclosing_Package_Body_Contract): Removed.
	(Analyze_Entry_Or_Subprogram_Contract): Add formal parameter
	Freeze_Id.  Propagate the entity of the freezing body to vaious
	analysis routines.
	(Analyze_Initial_Declaration_Contract): Removed.
	(Analyze_Object_Contract): Add formal parameter
	Freeze_Id. Propagate the entity of the freezing body to vaious
	analysis routines.
	(Analyze_Previous_Contracts): New routine.
	* contracts.ads (Analyze_Enclosing_Package_Body_Contract): Removed.
	(Analyze_Contracts): New routine.
	(Analyze_Entry_Or_Subprogram_Contract): Add formal
	parameter Freeze_Id and update the comment on usage.
	(Analyze_Initial_Declaration_Contract): Removed.
	(Analyze_Object_Contract): Add formal parameter Freeze_Id and
	update the comment on usage.
	(Analyze_Previous_Contracts): New routine.
	* sem_ch3.adb (Analyze_Declarations): Use Analyze_Contracts to
	analyze all contracts of eligible constructs.
	* sem_ch6.adb (Analyze_Generic_Subprogram_Body):
	A body no longer freezes the contract of its initial
	declaration. This effect is achieved through different means.
	(Analyze_Subprogram_Body_Helper): A body now freezes the contracts
	of all eligible constructs that precede it. A body no longer
	freezes the contract of its initial declaration. This effect is
	achieved through different means.
	* sem_ch7.adb (Analyze_Package_Body_Helper): A body now freezes
	the contracts of all eligible constructs that precede it. A body
	no longer freezes the contract of its initial declaration. This
	effect is achieved through different means.
	* sem_ch9.adb (Analyze_Entry_Body): A body now freezes
	the contracts of all eligible constructs that precede
	it. A body no longer freezes the contract of its initial
	declaration. This effect is achieved through different means.
	(Analyze_Protected_Body): A body now freezes the contracts
	of all eligible constructs that precede it. A body no longer
	freezes the contract of its initial declaration. This effect
	is achieved through different means.
	(Analyze_Task_Body): A
	body now freezes the contracts of all eligible constructs that
	precede it. A body no longer freezes the contract of its initial
	declaration. This effect is achieved through different means.
	* sem_prag.adb (Add_Item_To_Name_Buffer): Single protected/task
	objects now output their respective current instance of xxx
	type messages.	(Analyze_Contract_Cases_In_Decl_Part): Add
	formal parameter Freeze_Id. Emit a clarification message
	when an undefined entity may the byproduct of contract
	freezing.
	(Analyze_Part_Of_In_Decl_Part): Add formal
	parameter Freeze_Id. Emit a clarification message when an
	undefined entity may the byproduct of contract freezing.
	(Analyze_Pre_Post_Condition_In_Decl_Part): Add formal
	parameter Freeze_Id. Emit a clarification message when an
	undefined entity may the byproduct of contract freezing.
	(Analyze_Refined_State_In_Decl_Part): Do not report unused body
	states as constituents of single protected/task types may not
	bave been identified yet.
	(Collect_Subprogram_Inputs_Outputs):
	Reimplemented.	(Contract_Freeze_Error): New routine.
	(Process_Overloadable): Use predicate Is_Single_Task_Object.
	* sem_prag.ads (Analyze_Contract_Cases_In_Decl_Part):
	Add formal parameter Freeze_Id and update the comment
	on usage.
	(Analyze_Part_Of_In_Decl_Part): Add formal
	parameter Freeze_Id and update the comment on usage.
	(Analyze_Pre_Post_Condition_In_Decl_Part): Add formal parameter
	Freeze_Id and update the comment on usage.
	* sem_util.adb (Check_Unused_Body_States): Remove global
	variable Legal_Constits. The routine now reports unused
	body states regardless of whether constituents are
	legal or not.
	(Collect_Body_States): A constituent of a
	single protected/task type is not a visible state of a
	package body.
	(Collect_Visible_States): A constituent
	of a single protected/task type is not a visible
	state of a package body.
	(Has_Undefined_Reference): New routine.
	(Is_Single_Concurrent_Object): Reimplemented.
	(Is_Single_Protected_Object): New routine.
	(Is_Single_Task_Object): New routine.
	(Is_Visible_Object): New routine.
	(Report_Unused_Body_States): Moved to Check_Unused_Body_States.
	* sem_util.ads (Check_Unused_Body_States): Update the comment on usage.
	(Has_Undefined_Reference): New routine.
	(Is_Single_Protected_Object): New routine.
	(Is_Single_Task_Object): New routine.
	(Report_Unused_Body_States): Moved to Check_Unused_Body_States.

2015-11-18  Pierre-Marie de Rodat  <derodat@adacore.com>

	* Makefile.rtl, impunit.adb: Add g-strhas.ads.
	* g-strhas.ads: New file.
	* s-strhas.ads: Add a comment to redirect users to g-strhas.ads.

2015-11-18  Bob Duff  <duff@adacore.com>

	* sem_elab.adb (Check_Internal_Call_Continue): Fix the case
	where the call in question is to a renaming of a subprogram that
	can be safely called without ABE.
	* checks.adb: Minor edits.

From-SVN: r230546