[Patch, fortran] PR51870 - [OOP] ICE with ALLOCATE and SOURCE-expr function returning BT_CLASS

[Paul Richard Thomas]

Dear All,

After discussion off line with Tobias and a bit of tweaking, the patch
was committed as revision 183613.

2012-01-27  Paul Thomas  <pault@gcc.gnu.org>
	    Tobias Burnus <burnus@gcc.gnu.org>

	PR fortran/48705
	PR fortran/51870
	PR fortran/51943
	PR fortran/51946
	* trans-array.c (gfc_array_init_size): Add two extra arguments
	to convey the dynamic element size of a calls object and to
	return the number of elements that have been allocated.
	(gfc_array_allocate): Add the same arguments and use them to
	call gfc_array_init_size.  Before the allocation dereference
	the data pointer, if necessary. Set the allocated array to zero
	if the class element size or expr3 are non-null.
	* trans-expr.c (gfc_conv_class_to_class): Give this function
	global scope.
	(get_class_array_ref): New function.
	(gfc_copy_class_to_class): New function.
	* trans-array.h : Update prototype for gfc_array_allocate.
	* trans-stmt.c (gfc_trans_allocate): For non-variable class
	STATUS expressions extract the class object and the dynamic
	element size. Use the latter to call gfc_array_allocate and
	the former for setting the vptr and, via
	gfc_copy_class_to_clasfc_cs, to copy to the allocated data.
	* trans.h : Prototypes for gfc_get_class_array_ref,
	gfc_copy_class_to_class and gfc_conv_class_to_class.


2012-01-27  Paul Thomas  <pault@gcc.gnu.org>
	    Tobias Burnus <burnus@gcc.gnu.org>

	PR fortran/48705
	* gfortran.dg/class_allocate_11.f03: New.

	PR fortran/51870
	PR fortran/51943
	PR fortran/51946
	* gfortran.dg/class_allocate_7.f03: New.
	* gfortran.dg/class_allocate_8.f03: New.
	* gfortran.dg/class_allocate_9.f03: New.
	* gfortran.dg/class_allocate_10.f03: New.

Cheers

Paul