2011-08-04  Eric Botcazou  <ebotcazou@adacore.com>

	* layout.adb (Layout_Type): For composite types, do not set Esize.
	* freeze.adb (Set_Small_Size): Remove test on alignment and do not
	set Esize.
	(Size_Known): Look at the RM size of components instead of the Esize.
	(Freeze_Record_Type): Look at the RM size instead of the Esize to
	issue warning and activate Implicit_Packing.
	(Freeze_Entity): Likewise.  Do not issue a warning for alias/atomic
	if the Esize is not known.
	* sem_ch13.adb (Analyze_Attribute_Definition_Clause) <Size>: Set Esize
	for elementary types only.
	(Analyze_Record_Representation_Clause): Look at the RM size instead
	of the Esize to issue errors.
	* gcc-interface/decl.c (gnat_to_gnu_entity): Do not set Esize if it
	is not known.
	<E_Record_Type>: Look at the RM size instead of the Esize.  Remove
	obsolete block.  
	Look at the RM size instead of the Esize for types if the latter is
	not known.
	(gnat_to_gnu_field): Use Known_Esize instead of Known_Static_Esize.

2011-08-04  Ed Schonberg  <schonberg@adacore.com>

	* sem_type.adb: proper handling of equality not involving anonymous
	access types.

From-SVN: r177339