[Patch, Fortran, OOP] PR 50960: vtables not marked as constant

[Janus Weil]

Hi all,

the attached patch marks the 'vtab' symbols as constant
(FL_PARAMETER). They are fixed objects which are initialized once and
never change.

Regtested on x86_64-unknown-linux-gnu. Ok for trunk?

Is it ok to commit without a test case? If not, any suggestions how a
good test case could look like?

Cheers,
Janus


2011-11-08  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/50960
	* class.c (gfc_find_derived_vtab): Make the vtab symbols FL_PARAMETER.
	* expr.c (gfc_simplify_expr): Prevent vtabs from being replaced with
	their value.
	* resolve.c (resolve_values): Use-associated symbols do not need to
	be resolved again.
	(resolve_fl_parameter): Make sure the symbol has a value.
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