* passes.c (ipa_write_summaries_1): Set state;
	do not call compute_ltrans_boundary.
	(ipa_write_optimization_summaries): Likewise.
	(ipa_write_summaries): compute_ltrans_boundary here.
	* lto-streamer.h (lto_symtab_encoder_d): NODES are allocated in heap.
	(compute_ltrans_boundary): Update prototype.

	* lto.c (lto_wpa_write_files): Do not delete partition encoder;
	it is deleted after streaming.
	* lto-partition.c (partition_symbol_p): New function.
	(promote_var, promote_fn): Remove.
	(promote_symbol): New function.
	(lto_promote_cross_file_statics): First compute boundaries; rewrite
	to lookup the actual boundaries instead of computing them ad-hoc.

From-SVN: r191113