2013-04-11 Javier Miranda <miranda@adacore.com>

	* exp_ch11.adb (Expand_N_Handled_Sequence_Of_Statements): Do
	not add cleanup actions in thunks associated with interface types.
	* exp_ch3.ad[sb] (Is_Variable_Size_Record): Move declaration to
	the package spec.
	* exp_ch4.adb (Tagged_Conversion): Update call to
	Expand_Interface_Conversion since the parameter Is_Static is no
	longer needed.
	* exp_ch6.adb (Expand_N_Extended_Return_Statement): Adding
	assertion to ensure that interface thunks are never handled by
	this routine.
	(Expand_N_Simple_Function_Return): Do not rewrite this statement
	as an extended return statement in interface thunks, and do not
	perform copy in the secondary stack if the return statement is
	located in a thunk.
	* exp_disp.adb (Expand_Dispatching_Call): No longer displace
	the pointer to the returned object in functions returning interface
	types.
	(Expand_Interface_Thunk): For functions returning interface types
	displace the pointer to the returned object.
	(Expand_Interface_Conversion): Remove formal
	Is_Static since this subprogram can now evaluate it locally.
	* sem_ch3.adb (Add_Internal_Interface_Entities): For functions
	propagate the type returned by the covered interface primitive to
	the internal interface entity. Needed by the thunk to generate
	the code which displaces "this" to reference the corresponding
	secondary dispatch table.
	* sem_disp.adb (Propagate_Tag): Update call to
	Expand_Interface_Conversion since the parameter Is_Static is no
	longer needed.
	* sem_res.adb (Resolve_Type_Conversion): Update calls to
	Expand_Interface_Conversion since the parameter Is_Static is no
	longer needed plus code cleanup.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@197786 138bc75d-0d04-0410-961f-82ee72b054a4

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