ipa-polymorphic-call.c (possible_placement_new): Fix condition on size.

	* ipa-polymorphic-call.c (possible_placement_new): Fix condition
	on size.
	(ipa_polymorphic_call_context::restrict_to_inner_type): Do not walk
	into vptr pointer.
	(ipa_polymorphic_call_context::dump): Fix formating.
	(walk_ssa_copies): Add logic avoiding loops; update uses.
	* ipa-prop.c (ipa_analyze_call_uses): Compute vptr_changed.
	* g++.dg/ipa/devirt-42.C: Update template.
	* g++.dg/ipa/devirt-44.C: Update template.
	* g++.dg/ipa/devirt-45.C: Update template.
	* g++.dg/ipa/devirt-46.C: Update template.
	* g++.dg/ipa/devirt-47.C: Update template.
	* g++.dg/ipa/devirt-48.C: New testcase.

From-SVN: r215902