* doc/invoke.texi (-flto-partition, lto-partitions, lto-minpartition):
	Document.
	* opts.c (decode_options): Handle lto partitions.
	* common.opt (flto-partition=1to1, flto-partition=balanced): New.
	* params.def (PARAM_LTO_PARTITIONS, MIN_PARTITION_SIZE): New.

	* lto.c:  Include params.h.
	(add_cgraph_node_to_partition, add_varpool_node_to_partition): Do
	refcounting in aux field.
	(undo_partition, partition_cgraph_node_p, partition_varpool_node_p):
	New functions.
	(lto_1_to_1_map): Simplify.
	(lto_balanced_map): New function.
	(do_whole_program_analysis): Chose proper partitioning alg.
	* Make-lang.in (lto.o): Add dependency on params.h

From-SVN: r164995