2013-04-25 Hristian Kirtchev <kirtchev@adacore.com>

	* einfo.adb (Set_Abstract_States): The attribute now applies
	to generic packages.
	* sem_ch4.adb (Referenced): Moved to sem_util.
	* sem_ch7.adb (Unit_Requires_Body): A [generic] package with
	a non-null abstract state needs a body.
	* sem_prag.adb (Analyze_Depends_In_Decl_Part): Update the calls
	to Collect_Subprogram_Inputs_Outputs.
	(Analyze_Global_Item): Verify the proper usage of an item with mode
	In_Out or Output relative to the enclosing context.
	(Analyze_Pragma): Abstract_State can now be applied to a generic
	package. Do not reset the Analyzed flag for pragmas Depends and Global
	as this is not needed.
	(Appears_In): Moved to library level.
	(Check_Mode_Restiction_In_Enclosing_Context): New routine.
	(Collect_Subprogram_Inputs_Outputs): Moved to library level. Add
	formal parameters Subp_Id, Subp_Inputs, Subp_Outputs and Global
	seen along with comments on usage.
	* sem_util.ads, sem_util.adb (Referenced): New routine.

2013-04-25  Hristian Kirtchev  <kirtchev@adacore.com>

	* sem_ch6.adb (Expand_Contract_Cases): Generate
	detailed error messages only when switch -gnateE is in effect.

2013-04-25  Yannick Moy  <moy@adacore.com>

	* sem_attr.adb (Analyze_Attribute): Do not issue
	an error for a possibly misplaced 'Result or 'Old attribute when
	analyzing the aspect.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@198290 138bc75d-0d04-0410-961f-82ee72b054a4

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