* checks.adb (Apply_Address_Clause_Check): Remove Size_Warning_Output

	local variable and do not test it in Compile_Time_Bad_Alignment.
	Do not issue size or alignment warnings for the X'Address form.
	* sem_util.ads (Find_Overlaid_Object): Delete.
	(Find_Overlaid_Entity): New procedure.
	* sem_util.adb (Find_Overlaid_Object): Rename to...
	(Find_Overlaid_Entity): ...this and turn into a procedure.  Report
	whether the address is offseted within the overlaid entity.
	(Has_Compatible_Alignment): Track the offset globally instead of
	passing it to Check_Offset.  For an indexed component, compute the
	full offset when possible.  If the resulting offset is zero, only
	check the prefix.
	(Check_Offset): Delete.
	* sem_ch13.adb (Address_Clause_Check_Record): Add Off field.
	(Address_Aliased_Entity): Delete.
	(Analyze_Attribute_Definition_Clause) <Attribute_Address>: Call
	Find_Overlaid_Entity to find the overlaid entity and the offset.
	Adjust throughout for above change.
	(Validate_Address_Clauses): Always use attributes of entities, not of
	their type.  Tweak message for warning.  Call Has_Compatible_Alignment
	if the address is offseted to warn about incompatible alignments.
	* gcc-interface/gigi.h (annotate_object): Declare.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Annotate renaming
	entity.  Call annotate_object instead of annotating manually objects.
	(annotate_object): New function.
	* gcc-interface/trans.c (Subprogram_Body_to_gnu): Annotate parameters
	at the end.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@149520 138bc75d-0d04-0410-961f-82ee72b054a4

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