exp_ch6.adb (Add_Or_Save_Precondition): New routine.

exp_ch6.adb (Add_Or_Save_Precondition): New routine.

2014-02-25  Hristian Kirtchev  <kirtchev@adacore.com>

	* exp_ch6.adb (Add_Or_Save_Precondition): New routine.
	(Collect_Body_Postconditions_In_Decls): New routine.
	(Collect_Body_Postconditions_Of_Kind): Factor out code. Handle
	postcondition aspects or pragmas that appear on a subprogram
	body stub.
	(Collect_Spec_Preconditions): Factor out code. Handle
	precondition aspects or pragmas that appear on a subprogram
	body stub.
	* sem_ch6.adb (Analyze_Subprogram_Body_Helper): The analysis of
	aspects that apply to a subprogram body stub is no longer delayed,
	the aspects are analyzed on the spot.
	(SPARK_Aspect_Error):
	Aspects that apply to a subprogram declaration cannot appear in
	a subunit.
	* sem_ch10.adb Remove with and use clause for Sem_Ch13.
	(Analyze_Proper_Body): Add local variable Comp_Unit. Unum
	is now a local variable. Code cleanup. Analysis related to
	the aspects of a subprogram body stub is now carried out by
	Analyze_Subprogram_Body_Helper. Do not propagate the aspects
	and/or pragmas of a subprogram body stub to the proper body
	as this is no longer needed. Do not analyze the aspects of a
	subprogram stub when the corresponding source unit is missing.
	(Analyze_Protected_Body_Stub): Flag the illegal use of aspects
	on a stub.
	(Analyze_Task_Body_Stub): Flag the illegal use of
	aspects on a stub.
	(Optional_Subunit): Add local variable Unum.
	* sem_ch13.adb (Insert_Delayed_Pragma): Do not analyze a generated
	pragma when it applies to a subprogram body stub.
	* sem_prag.adb (Analyze_Pragma): Pragmas Contract_Cases,
	Depends and Global can now apply to a subprogram body stub as
	long as it acts as its own spec.
	(Analyze_Refined_Pragma):
	Code reformatting. Refinement pragmas cannot apply to a subunit.

From-SVN: r208134