[Patch, Fortran, OOP] PR 45290/45271: pointer initialization / vtab init

[Janus Weil <janus at gcc dot gnu dot org>]

Hi all,

this patch fixes PR 45271 by giving static initializers to the PPC
components of the vtabs. This is made possible by the recent progress
on pointer initialization (PR 45290). A prerequisite for vtab
initialization was fixing comment #6 of that PR, which is accomplished
simply by removing an 'gcc_assert' in 'build_function_decl'.

The central pieces of the patch are:
1) Setting up the initializer in class.c (add_proc_comp).
2) Removing 'gfc_trans_assign_vtab_procs', which handled the dynamic
initialization of the vtab PPCs at runtime.

Moreover some supplemental changes were needed, namely:
3) Modifying 'gfc_conv_initializer' to handle intialization of
array-valued procedure pointers.
4) Modifying 'mio_component' to skip the initializers of the vtabs.
This was done to fix a regression on class_15.f03. The initializers
are actually only needed in the original module where the vtab is set
up, but not anywhere else.

The patch was regtested on x86_64-unknown-linux-gnu. Ok for trunk?

Cheers,
Janus


2010-08-20  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/45271
	PR fortran/45290
	* class.c (add_proc_comp): Add static initializer for PPCs.
	(add_procs_to_declared_vtab): Modified comment.
	* module.c (mio_component): Add argument 'vtype'. Don't read/write the
	initializer if the component is part of a vtype.
	(mio_component_list): Add argument 'vtype', pass it on to
	'mio_component'.
	(mio_symbol): Modified call to 'mio_component_list'.
	* trans.h (gfc_conv_initializer): Modified prototype.
	(gfc_trans_assign_vtab_procs): Removed.
	* trans-common.c (create_common): Modified call to
	'gfc_conv_initializer'.
	* trans-decl.c (gfc_get_symbol_decl,get_proc_pointer_decl,
	gfc_emit_parameter_debug_info): Modified call to
	'gfc_conv_initializer'.
	(build_function_decl): Remove assertion.
	* trans-expr.c (gfc_conv_derived_to_class,gfc_trans_class_assign):
	Removed call to 'gfc_trans_assign_vtab_procs'.
	(gfc_conv_initializer): Add argument 'procptr'.
	(gfc_conv_structure): Modified call to 'gfc_conv_initializer'.
	(gfc_trans_assign_vtab_procs): Removed.
	* trans-stmt.c (gfc_trans_allocate): Removed call to
	'gfc_trans_assign_vtab_procs'.


2010-08-20  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/45271
	PR fortran/45290
	* gfortran.dg/pointer_init_5.f90: New.
	* gfortran.dg/typebound_call_18.f03: New.

Attachment: vtab_init.diff
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Attachment: pointer_init_5.f90
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Attachment: typebound_call_18.f03
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