2016-10-25 Paul Thomas <pault@gcc.gnu.org>

2016-10-25  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/45516
	* class.c (gfc_find_derived_vtab): Detect recursive allocatable
	derived type components. If present, add '_deallocate' field to
	the vtable and build the '__deallocate' function.
	* decl.c (build_struct): Allow recursive allocatable derived
	type components for -std=f2008 or more.
	(gfc_match_data_decl): Accept these derived types.
	* expr.c (gfc_has_default_initializer): Ditto.
	* resolve.c (resolve_component): Make sure that the vtable is
	built for these derived types.
	* trans-array.c(structure_alloc_comps) : Use the '__deallocate'
	function for the automatic deallocation of these types.
	* trans-expr.c : Generate the deallocate accessor.
	* trans.h : Add its prototype.
	* trans-types.c (gfc_get_derived_type): Treat the recursive
	allocatable components in the same way as the corresponding
	pointer components.

2016-10-25  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/45516
	* gfortran.dg/class_2.f03: Set -std=f2003.
	* gfortran.dg/finalize_21.f90: Modify tree-dump.
	* gfortran.dg/recursive_alloc_comp_1.f08: New test.
	* gfortran.dg/recursive_alloc_comp_2.f08: New test.
	* gfortran.dg/recursive_alloc_comp_3.f08: New test.
	* gfortran.dg/recursive_alloc_comp_4.f08: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241539 138bc75d-0d04-0410-961f-82ee72b054a4