PR lto/52722
	PR lto/51765
	PR lto/52634	
	* lto-cgraph.c (compute_ltrans_boundary): When alias is in the boundary,
	add its target too.
	* lto.c (add_references_to_partition): Add also aliased nodes.
	(add_cgraph_node_to_partition,
	add_varpool_node_to_partition): Work on nodes, not functions/variables;
	when adding alias, add also the aliased object.

	* gcc.dg/lto/pr52634_1.c: New testcase.
	* gcc.dg/lto/pr52634_0.c: New testcase.

From-SVN: r186252