* lto-cgraph.c (asm_nodes_output): Make global.
	* lto-wrapper.c (run_gcc): Pass down paralelizm to WPA.
	* gcc.c (AS_NEEDS_DASH_FOR_PIPED_INPUT): Allow WPA
	parameter
	(driver_handle_option): Handle OPT_fwpa.

	* lto.c (lto_parallelism): New static var.
	(do_stream_out, wait_for_child, stream_out): New static functions.
	(lto_wpa_write_files): Add support for parallel streaming.
	(do_whole_program_analysis): Set parallelism.
	* lang.opt (fwpa): Add parameter.
	* lto-lang.c (lto_handle_option): Handle flag_wpa.
	(lto_init): Update use of flag_wpa.
	* lto-streamer.h (asm_nodes_output): Declare.

From-SVN: r207515