* c-typeck.c (convert_for_assignment): Use
	vector_targets_convertible_p.
	* c-common.c (vector_targets_convertible_p): New.
	* c-common.h (vector_targets_convertible_p): New prototype.
	* config/rs6000/rs6000.c (rs6000_is_opaque_type): Do not check
	opaque_p_V2SI_type_node.

	* typeck.c (comp_ptr_ttypes_real): Use vector_targets_convertible_p.
	(comp_ptr_ttypes_const): Likewise.

	* g++.dg/other/opaque-1.C, g++.dg/other/opaque-2.C,
	g++.dg/other/opaque-3.C: Also run on powerpc*-*-linux*spe*.

From-SVN: r137325