re PR fortran/70752 (Incorrect LEN for ALLOCATABLE CHARACTER)

re PR fortran/70752 (Incorrect LEN for ALLOCATABLE CHARACTER)

2018-09-30  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/70752
	PR fortran/72709
	* trans-array.c (gfc_conv_scalarized_array_ref): If this is a
	deferred type and the info->descriptor is present, use the
	info->descriptor
	(gfc_conv_array_ref): Is the se expr is a descriptor type, pass
	it as 'decl' rather than the symbol backend_decl.
	(gfc_array_allocate): If the se string_length is a component
	reference, fix it and use it for the expression string length
	if the latter is not a variable type. If it is a variable do
	an assignment. Make use of component ref string lengths to set
	the descriptor 'span'.
	(gfc_conv_expr_descriptor): For pointer assignment, do not set
	the span field if gfc_get_array_span returns zero.
	* trans.c (get_array_span): If the upper bound a character type
	is zero, use the descriptor span if available.

2018-09-30  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/70752
	PR fortran/72709
	* gfortran.dg/deferred_character_25.f90 : New test.
	* gfortran.dg/deferred_character_26.f90 : New test.
	* gfortran.dg/deferred_character_27.f90 : New test to verify
	that PR82617 remains fixed.

From-SVN: r264724