gimple-fold.c (gimple_extract_devirt_binfo_from_cst): Add new arugment expected_type.

gimple-fold.c (gimple_extract_devirt_binfo_from_cst): Add new arugment expected_type.

	* gimple-fold.c (gimple_extract_devirt_binfo_from_cst): Add new
	arugment expected_type.
	(gimple_fold_call): Use it.
	* gimple.h (gimple_extract_devirt_binfo_from_cst): Update prototype.
	* ipa-cp.c (ipa_get_indirect_edge_target_1): Update.
	* ipa-prop.c (ipa_analyze_virtual_call_uses): Use
	obj_type_ref_class.
	(try_make_edge_direct_virtual_call): Likewise.
	* tree.c (obj_type_ref_class): New.
	* tree.h (obj_type_ref_class): Use it.

From-SVN: r201789