backport: re PR fortran/42053 ([OOP] SELECT TYPE: reject duplicate CLASS IS blocks)

backport: re PR fortran/42053 ([OOP] SELECT TYPE: reject duplicate CLASS IS blocks)

merge from fortran-dev branch:

gcc/fortran/

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/42053
	* resolve.c (resolve_select_type): Check for duplicate CLASS IS blocks.

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/41631
	* decl.c (gfc_match_derived_decl): Set extension level.
	* gfortran.h (symbol_attribute): Expand 'extension' bit field to 8 bit.
	* iresolve.c (gfc_resolve_extends_type_of): Return value of
	'is_extension_of' has kind=4.
	* match.c (select_type_set_tmp,gfc_match_class_is): Create temporary
	for CLASS IS blocks.
	* module.c (MOD_VERSION): Bump module version.
	(ab_attribute,attr_bits): Remove AB_EXTENSION.
	(mio_symbol_attribute): Handle expanded 'extension' field.
	* resolve.c (resolve_select_type): Implement CLASS IS blocks.
	(resolve_fl_variable_derived): Show correct type name.
	* symbol.c (gfc_build_class_symbol): Set extension level.

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	* intrinsic.h (gfc_resolve_extends_type_of): Add prototype.
	* intrinsic.c (add_functions): Use 'gfc_resolve_extends_type_of'.
	* iresolve.c (gfc_resolve_extends_type_of): New function, which
	replaces the call to EXTENDS_TYPE_OF by the library function
	'is_extension_of' and modifies the arguments.
	* trans-intrinsic.c (gfc_conv_extends_type_of): Removed.
	(gfc_conv_intrinsic_function): FOR EXTENDS_TYPE_OF, don't call
	gfc_conv_extends_type_of but gfc_conv_intrinsic_funcall.

2009-11-30  Paul Thomas  <pault@gcc.gnu.org>
	    Janus Weil  <janus@gcc.gnu.org>

	* decl.c (encapsulate_class_symbol): Replaced by
	'gfc_build_class_symbol'.
	(build_sym,build_struct): Call 'gfc_build_class_symbol'.
	(gfc_match_derived_decl): Replace vindex by hash_value.
	* dump-parse-tree.c (show_symbol): Replace vindex by hash_value.
	* gfortran.h (symbol_attribute): Add field 'vtab'.
	(gfc_symbol): Replace vindex by hash_value.
	(gfc_class_esym_list): Ditto.
	(gfc_get_derived_type,gfc_build_class_symbol,gfc_find_derived_vtab):
	New prototypes.
	* module.c (mio_symbol): Replace vindex by hash_value.
	* resolve.c (vindex_expr): Rename to 'hash_value_expr'.
	(resolve_class_compcall,resolve_class_typebound_call): Renamed
	'vindex_expr'.
	(resolve_select_type): Replace $vindex by $vptr->$hash.
	* symbol.c (gfc_add_save): Handle vtab symbols.
	(gfc_type_compatible): Rewrite.
	(gfc_build_class_symbol): New function which replaces
	'encapsulate_class_symbol'.
	(gfc_find_derived_vtab): New function to set up a vtab symbol for a
	derived type.
	* trans-decl.c (gfc_create_module_variable): Handle vtab symbols.
	* trans-expr.c (select_class_proc): Replace vindex by hash_value.
	(gfc_conv_derived_to_class): New function to construct a temporary
	CLASS variable from a derived type expression.
	(gfc_conv_procedure_call): Call 'gfc_conv_derived_to_class'.
	(gfc_conv_structure): Initialize the $extends and $size fields of
	vtab symbols.
	(gfc_trans_class_assign): Replace $vindex by $vptr. Remove the $size
	assignment.
	* trans-intrinsic.c (gfc_conv_same_type_as): Replace $vindex by
	$vptr->$hash, and replace vindex by hash_value.
	* trans-stmt.c (gfc_trans_allocate): Insert $vptr references, replace
	$vindex by $vptr. Remove the $size assignment.
	* trans-types.c (gfc_get_derived_type): Make it non-static.

gcc/testsuite/

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/42053
	* gfortran.dg/select_type_9.f03: New.

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/41631
	* gfortran.dg/extends_type_of_1.f03: Fix invalid test case.
	* gfortran.dg/module_md5_1.f90: Adjusted MD5 sum.
	* gfortran.dg/select_type_1.f03: Remove FIXMEs.
	* gfortran.dg/select_type_2.f03: Ditto.
	* gfortran.dg/select_type_8.f03: New test.

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	* gfortran.dg/extends_type_of_1.f03: New test.
	* gfortran.dg/same_type_as_1.f03: Extended.

2009-11-30  Paul Thomas  <pault@gcc.gnu.org>

	* gfortran.dg/class_4c.f03: Add dg-additional-sources.
	* gfortran.dg/class_4d.f03: Rename module. Cleanup modules.

libgfortran/

2009-11-30  Janus Weil  <janus@gcc.gnu.org>

	* gfortran.map: Add _gfortran_is_extension_of.
	* Makefile.am: Add intrinsics/extends_type_of.c.
	* Makefile.in: Regenerated.
	* intrinsics/extends_type_of.c: New file.

From-SVN: r154840